1891.] GEOGRAPHICAL DISTRIBUTION OF SLVtiS. 217 



Mr. E. A. Smith as Aihoracophorus 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 o{ Aneitea. 



A. biteniaculatus (Q. & G.). — New Zealand. 



A. biteniaculatus forma antipodarian (Gray). — New Zealand. 

 Gray's type is in the British Mu.«eum, 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 Atlioracophonts, 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 

 fairlj'- well-defined margin. Dunedin (Otago Utdversity Museum), 

 in the British Museum. This form differs very much in colour from 

 Button's description of the type. 



Subg. Pseudaaeitea, nov. — Small Slugs of New Zealand and the 

 Auckland Is., resembling Athoracophorus, but showing a decided 

 tendency towards the formation of a " mantle-area " like that of 

 Aneiteci. The Jcinella papillata of Hutton may be taken as the 

 type. 



A. papillatus i^ixxiton') . — New Zealand, North Island and South 

 Island ; also Auckland Is. and Chatham Is. A specimen from Dun- 

 edin [Otago Vniversitij 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 

 1 1 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. Eespiratory orifice pale, on a pale patch, which is ringed 

 with black. Head injured and shrivelled in the specimen described. 



