Total of Testaceous Mollusca, common to the west of Scandinavia and the north of Spain, 137 in 289, or 47 per cent. of the former. All the species, enumerated in the list immediately preceding, inhabit the Mediterranean, or to the southward of Cape St. Vincent, except the following: Consequently, there are of Scandinavian species extending into the Mediterranean region Acephala lamellibranchiata.......... 66 in 124, or 53 per cent. Total of testaceous mollusca, common to the west of Scandinavia and the Mediterranean region, 119 in 289, or 41 per cent. The Scandinavian species obtained in the Canary Islands are Total number of marine testaceous mollusca common to the west of Scandinavia and to the Canary Islands, 50 in 289, or 17 per cent. of the former. BRITISH SEAS. The number of species of British marine testaceous mollusca, recorded by Messrs. Forbes and Hanley, is 406. The following British species are common to North America : ACEPHALA LAMELLI Cyprina Islandica Chiton albus Lamellaria perspicua tenebrosa Shewing the proportion to British species of Acephala lamellibranchiata...... .. 24 in 163, or 14 per cent. 2 5. 40 Total of British marine testaceous mollusca, common to North Referring to the list of species common to Britain and Scandinavia, we find them to bear the following proportion to the British species: Total of British marine testaceous mollusca, common to Scandinavia, 217 in 406, or 53 per cent. The following British species have been obtained on the coasts of the north of Spain, including Vigo, except those marked, which, though not hitherto procured from the district, may be considered as belonging to it, in consequence of having been found in more southern localities: |