114 THE NAUTILUS. 



Cumingianus is a large, well-marked species and was excel- 

 lently figured by Reeve. It was the first of the more-widely 

 umbilicated Philippine species to be described and is not likely 

 to be confounded with any of its contemporaneous species. 



The characteristic specimen figured is from the MacAndrew 

 collection (Coll. Walker, No. 46916) and measures: alt. 39.7, 

 diam. 30.5 mm. Another with it measures: alt. 36.5, diam. 

 29 mm. This specimen has its operculum, which is of the 

 characteristic javanicus type. 



The specimen figured by Bartsch (Pr. U. S. N. M., XXXII, 

 1907, pi. X, fig. 7) is apparently immature as it measures only 

 alt. 17.1, diam. 14.8 mm. 



Autoptically unknown to Frauenfeld, von Martens and Ko- 

 belt, the first two express no opinion in regard to it, but the 

 latter (Con. Cab., Viviparidae. 1908, p. 273) thinks that it is 

 probably a thick-shelled variety of V. costatus (Q. and G.); but 

 that view is not tenable. 



VII. 

 VIVIPARUS ANGULARIS (Miiller). PI. VIII, figs. 4-5. 



Nerita angularis Miiller. Hist. Verm., II, 1774, p. 187. 

 Helix angularis Chemnitz. Con. Cab., IX, 1786, p. 160, pi. 

 134, figs. 1222-1223. 



Miiller' s description of his Nerita angularis is as follows: 



' ' Nerita testa imperforata, virescente, anfractibus spiraliter angu- 

 lat'is, fauce alba. 



1 ' Cochlea virginiana e fiavo viridescens non fasciata. ' ' 



"List. Syn. t. 127, 1 27. 



"Dan. Kant-neriten. 



long. 12 lin. lat. 6 lin. 



' ' Testa opaca, conica, glabra virescens striis transvers'is subtttlimis, 

 spiralibus tribus in singulo anfractu elevatis, acutis. Anfractus 

 quinque prope perpendiculares. 



' 'Apertura retundata, ad anfractum vicinum in angulum producta. 

 Foramen vel umbilicus nullus. Faux calcarea. Striae spirales in 

 quibusdam evanescunt. 



" Figura Listeri nostril major, caeterum refert. In flumine 

 Chinensi emporium Canton alluente. ' ' 



