A History of Crustacea: Recent MalacostracaD. Appleton, 1893 - 466 pagini |
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Pagina 32
... segment , is considered by others not to be a true twenty - first segment , but a median outgrowth of the twentieth . Scarcely ever can the whole number be dis- tinguished in one and the same animal . As the Entomos- traca always have ...
... segment , is considered by others not to be a true twenty - first segment , but a median outgrowth of the twentieth . Scarcely ever can the whole number be dis- tinguished in one and the same animal . As the Entomos- traca always have ...
Pagina 34
... segment should be studied , in some form the less abnormal the better . 1. The first segment is known as the ocular or ophth- almic . This is clearly articulated in the Squillidæ , but only occasionally in other groups , as in the ...
... segment should be studied , in some form the less abnormal the better . 1. The first segment is known as the ocular or ophth- almic . This is clearly articulated in the Squillidæ , but only occasionally in other groups , as in the ...
Pagina 39
... segment is of great im- portance , since from this , or from it in conjunction with the preceding segment , the carapace is developed . Its appendages also , the mandibles , yield in value to very few of the other organs . In form they ...
... segment is of great im- portance , since from this , or from it in conjunction with the preceding segment , the carapace is developed . Its appendages also , the mandibles , yield in value to very few of the other organs . In form they ...
Pagina 41
... ( The scaphognathite . ) 2 The Norwegian North Atlantic Expedition Crustacea , p . 21 . Oversigt over de paa Dijmphna - Togtet indsamlede Krebsdyr , p . 193 note , and p . 252 . 7. The appendages of the seventh segment are dis- tinguished ...
... ( The scaphognathite . ) 2 The Norwegian North Atlantic Expedition Crustacea , p . 21 . Oversigt over de paa Dijmphna - Togtet indsamlede Krebsdyr , p . 193 note , and p . 252 . 7. The appendages of the seventh segment are dis- tinguished ...
Pagina 42
... segment , and yet do not violate the rule that a single segment is limited to a single pair of appendages . By tracing the process of development Dr. Claus made it clear that they were in fact the exopods and endopods of a single pair ...
... segment , and yet do not violate the rule that a single segment is limited to a single pair of appendages . By tracing the process of development Dr. Claus made it clear that they were in fact the exopods and endopods of a single pair ...
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Termeni și expresii frecvente
adult Amphipoda animal Anomura apex appendages basal joint Bate and Westwood Beddard belong Brachyura branchiæ branchial branchial cavity Budde-Lund carapace character chelate chelipeds crab Crustacea Cumacea Dana described developed distinct distinguished Dollfus dorsal epipod exopod eye-stalks eyes Fabricius fathoms female fifth joint fifth pair five pairs flagella flagellum Fritz Müller front genera genus Giard and Bonnier gnathopods Haan inch inner branch Isopoda Kossmann Kröyer larvæ larval last pair Latreille Leach limbs Linn Macrura Malacostraca male mandibles margin maxillæ Miers Milne-Edwards Mysis outer branch pair of legs pair of trunk-legs pairs of pleopods palp parasitic peduncle peræon peræopods pleon pleopods preceding Risso rostrum rudimentary S. I. Smith Sars second antennæ second joint second maxillipeds setæ seventh joint short side sixth segment slender specimens Spence Bate spines Stimpson sub-order telson terminal joint third maxillipeds three pairs three-jointed tribe trunk two-jointed type species uropods ventral
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