THE NAUTILUS. Ill 



the species is usually credited to him, but in the index the 

 species is credited to Swainson. It is possible that he thought 

 that the shell that he described and figured was the same as 

 Swainson' s species. Frauenfeld (Verzeichniss, Paludina, 1864, 

 p. 584) expresses the opinion that Reeve's species is really the 

 same, but the figure, description, such as it is, and the locality, 

 if correct, renders it quite improbable. 



I do not think either that the shell figured by Bartsch as this 

 species is really the same. 



Reeve as usual gives no dimensions, but his figure measures: 

 alt. 25, diam. 20; aperture, alt. 13.5, diarn. 12 mm. 



The type, said by Reeve to be in the Cuming Collection, 

 seems to have been lost or mislaid as Mr. H. C. Fulton, who 

 made a search for it at my request, was unable to find it at the 

 British Museum. 



I have before me four shells that I believe represent this 

 species and which are figured on pi. IX, figs. 1-4. Two (figs. 

 1 and 2) are from the Andrews collection and were sent to Mrs. 

 Andrews by Dr. Wesley Newcomb as V. amplior Rve., and as 

 from the Philippine Islands. They are clearly not Reeve's 

 amplior, which Frauenfeld (Verzeichniss, p. 569) considers the 

 same as Mousson's V. lineolatus amplus and Kobelt (Con. Cab., 

 Viviparidae, 1908, p. 260) calls a variety of V. javanicus. 



The third specimen (fig. 3) is No. 3252 of the collection of 

 the Museum of Zoology, University of Michigan, and formed a 

 part of the collection of Joseph Monds, of Salem, Mass., pur- 

 chased by the University in 1855. It was originally unnamed 

 and is labeled "Manilla." 



The fourth (fig. 4), (Coll. Walker, No. 31774) was part of 

 the Quadras collection and has his original label ' ' Pal. carinata 

 Rve., Rio Pasig, Manila." With it was a larger shell of appar- 

 ently a different species. 



As Reeve's type has disappeared, I propose to call the species 

 represented by these specimens Viviparus pseudocarinatus, fig. 1 

 being the type and the others paratypes. If Reeve's type 

 should be found and prove to be identical, his specific name 

 will be superseded by pseudocarinatus. 



Viviparus pseudocarinatus may be described as follows: Shell 



