OCR Text |
Show 1891.] GEOGRAPHICAL DISTRIBUTION OF SLUGS. 217 Mr. E. A. Smith as Athoracophorus virgatus, and the original specimens are in the British Museum. • ATHORACOPHORUS, Gould, 1852 (=Janella, Gray).-A New- Zealand genus, consisting of small species with a dorsal groove, but in the typical forms no triangular " mantle " like that of Aneitea. A. bitentaculatus (Q. & G.).-New Zealand. A. bitentaculatus forma antipodarum (Gray).-New Zealand. Gray's type is in the British Museum, as well as a specimen from Wellington (Otago Univ. Museum). The variety differs from the type in being without spots. Subg. Konophora, Hutton.-This subgenus or section scarcely differs from Athoracophorus, but the dorsal groove, in a specimen in the British Museum, is not carried forward medially beyond the point where it branches, and the diverging branches converge below the tentacles and unite just above the mouth. A. marmoreus (Hutton).-New Zealand, South Island. A. marmoreus forma nov.: 22 millim. long (in alcohol). Whitish, with scattered pale brownish depressed-raised tubercles, foot with a fairly well-defined margin. Dnnedin (Otago University Museum), in the British Museum. This form differs very much in colour from Hutton's description of the type. Subg. Pseudaneitea, nov.-Small Slugs of N e w Zealand and the Auckland Is., resembling Athoracophorus, but showing a decided tendency towards the formation of a " mantle-area " like that of Aneitea. The Jcmella papillata of Hutton may be taken as the type. A. papillatus (Hutton).-New Zealand, North Island and South Island; also Auckland Is. and Chatham Is. A specimen from Dun-edin (Otago University Museum) is in the British Museum. This species is widely different from A. bitentaculatus, of which it was considered a variety. The " mantle-area" is quadrangular, and the edges of the foot are excavate-grooved. The dorsal groove persists somewhat on the face. A. verrucosus, V. Mts. in Simroth. Auckland Is. Very nearly allied to the last. The " mantle-area " is triangular. A. marmoratus, V. Mts. in Simroth. Auckland Is. This will probably form a distinct subgenus or section. The specific name is unfortunately chosen, as there is already a marmoreus of Hutton. NEOJANELLA, n. g. The most simply developed of the family, lacking both the " mantle-area " and the dorsal groove, Neojanella dubia, n. sp.-Length (in alcohol) 53 millim., breadth 11 millim. Sole not differentiated into parts, and only a very slight groove between the sole and back. No " mantle-area." Respiratory orifice situated on the back, slightly to the right of the median line. Tail rounded, flattened, no keel, no mucus-pore. Sole pale yellowish. Back pale yellowish, marbled all over with black or dark bluish grey. Respiratory orifice pale, on a pale patch, which is ringed with black. Head injured and shrivelled in the specimen described. |