COLLINGE : NON-OPERCULATE LAND AND FRESHWATER MOLLUSCS 85 



Cochin China. Later Semper (26) found a slug in Central Luzon 

 which he named Vaginulu^ fri</nnus, and expressed the opinion 

 that it was more like a Liiiiax than a Vwiinula. Stoliczka (30) 

 in 1873 found in Penang a species closely allied to V. tourranmnixix, 

 Soul., which according to Heynemann (17), is probably identical with 

 the 1 '. pulvendenta of Benson from the same island. Heynemann in 

 1876! described a further new species from Queensland, which he 

 named V. australu. In 1882, Heude (16, p. 10, pi. xiii, figs. 2, 2a) 

 gave a brief description of a slug found in Eastern China, under the 

 name of Vwjimdus sitiends ; finding, however, that the name .sinensis 

 was preoccupied by Mollendorff's Vagitmla sinenms, he re-named it 

 leonlna, an altogether unneccessary change, as he now (16) transferred 

 it to a new genus Rathouida. Tapparone-Canefri (31) in 1883 des- 

 cribed a species from New Guinea which he named V. prisinatira. 

 Heude in 1885 (16, p. 100, pi. xxvi, figs. i. la) gave a description and 

 figures of a further new species of Rathouisia {R. ti(irma), while at the 

 same time Rathouis (24) gave a short, but exceedingly interesting 

 account of the life-history of R. leojiina, Heude, and figures of many 

 parts of the internal structure. Unfortunately, as the Sarasins (25) have 

 observed, the lithographic impressions of his figures are so faint that 

 much of the detail is lost. 



When studying the specimens of slugs in the British Museum 

 collection in 1885, Heynemann examined two slugs, one from an 

 island in the Torres Straits, the other from the Huon Gulf (17). 



Heude in 1890 (16, p. 133, pi. xxxvi, figs. 23, 23a), described a 

 further new species of Ratliouisia (R. pantlierina) from Eastern China, 

 and gave figures of the animal. 



In 1891, Simroth (27) in a paper betokening rare and critical in- 

 sight, founded the genera Atopos and Pruma, the former including 

 three new species : A. sem]>en from Mindanao, and A. leuckarti and 

 A. sfi-ubelli from Amboina, and the Va<jinulu>^ tritjonus of Semper and 

 the V. 2Julve7'ulenta of Benson. The new genus Prisma included the 

 following species : P. tourrannense, Soul., from Cochin China, P. 

 prmnaticum^ Tap.-Can., from New Guinea, P. audrale, Heyn., from 

 Queensland, and the Huon Gulf specimen in the British Museum 

 collection, to which he gave the name of P. heynemanni. A detailed 

 account of the anatomy of the three new species of Atopos was given, 

 illustrated by figures. 



In the same year Cockerell (2) published the names Va(iundinae 

 or Ratliouininae, as a sub-family for the genera Ratliouisia, Atopos and 

 Prisma. He further pointed out that a specimen in the British 



t J. Mus. Godeffr., 1876, xii, p. 159. 



