In the month of April, 1852, I spent two days at Mogador, in the south west of Morocco, when I obtained 110 species of mollusca ; the following is the list, not previously published It will be seen that the fauna of Mogador, as illustrated by the preceding list, is generally identical with that of the Mediterranean and southern peninsula, and that while a few (Marginella, Mitra zebina, a Chiton, Columbella Broderippii, and a Turbo unnamed) are probably natives of tropical Africa, and all but the last obtained in the Canaries ; others, such as Tellina fabula, Lucina borealis, Patella pellucida, Trochus crassus, &c., are typical of a more northern fauna than that of the Mediterranean. About one-half the species range as far north as Britain, but of 22 of them dredged in 35 to 50 fathoms, (the remainder being littoral or from shallow water,) all but 6 are well-known inhabitants of the British seas. CANARY ISLANDS. Messrs. Webb and Berthelot, in their valuable work on the Natural History of the Canary Islands, enumerate 124 species of Marine Testaceous Mollusca. During a month that I passed in these Islands, in 1852, I procured the following: Donax anatinus? Ervilia castanea (new) 12 to 16 f. 12 to 16 f. sand & m. frequent; young; Lan cerote 12 to 16 f. 12 to 16 f. sand & m. frequent; Lancerote; Venus verucosa spots 12 to 60 f. 12 to 16 f. sand & m. very frequent; small, Lucina Adansoni frequent; small s. & weed frequent; bright colour mud rare; valves; Teneriffe 12 to 16 f. 12 to 16 f. m.&weed frequent; Lancerote m.&weed frequent; Lancerote sand & m. rare sand &m. rare mud rare leucoma 12 to 16 f. flexuosa 20 to 60 f. 12 fath. 12 to 16 f. shore 12 to 20 f. 20 fath. coral & stone frequent; allied to M. Petagne of Scacchi 12 to 60 f. 12 to 16 f. gravel&weed frequent |