198 PROCEEDINGS OF THE ACADEMY OF [May-Oct., 



Cochliopa guatemalensis (:\Iorelet) 



Valvata guatemalensis Morelet, Testacea Novissima, etc., II, 1851, p. 22. 



Fischer and Crosse, Miss. Sci. Mex., Moll. II, p. 302, pi. 48, figs. 2-26; 



pi. 50, figs. 1-16. 

 Cochliopa guatemalensis (Morel.) v. Martens, Biologia, p. 428. 



Rio Michatoj^a near Istapa, southern Guatemala. 



Cochliopa rowelli (Tryon). 



Amnicola rowelli Tryon, Proc. A. N. S. Phila., 1863, p. 147, pi. 1, figs. 8, 9. 



Cochliopa rowelli Tryon, Stimpson, Smithsonian Misc. Coll. No. 201, 1865, 

 p. 50. W. G. Binney, Land and Freshwater Shells of N. A., Ill, p. 73, 

 figs. 144. Pilsbrv, Nautilus XIX, 1905, p. 91. J. Powell, Nautilus, XX, 

 p. 10. 



Panama (W. Newcomb); Rio Matasnillo, Las Sabanas, Panama 

 (J. Zetek). 



This species has been omitted from works on Central American 

 mollusks because it was reported from California by the Rev. J. 

 Rowell, who collected the original specimens. No other Californian 

 conchologist has found it in the places he mentioned, but it has been 

 taken in Panama by Dr. Wesley Newcomb many years ago, and 

 recently by Mr. James Zetek. There can be no reasonable doabt 

 that Mr. Rowell was mistaken in the locality, and really picked it 

 up on his way to California by the Panama route. 



Cochliopa tryoniana Pils. 



Nautilus, IV, 1890, p. 52. Proc. A. N. S. Phila., 1891, p. 331, pi. 15, fig. 12. 

 Biologia, p. 428, pi. 33, figs. 9-9c. 



Western Nicaragua, southwestern Costa Rica. 



Cochliopa trochulus Martens. 



Biologia, p. 429, pi. 23, fig. 7. 



Southwestern Costa Rica (Pittier and Biolley) to Panama (James 

 Zetek). 



Cochliopa infundibulum Martens. 

 Biologia, p. 429, pi. 23. fig. 3. 



Guatemala. 



Another related species was taken at Esmeralda, Rio Dulce, 

 Guatemala, by Mr. Hinkley. This, I understand, will soon be de- 

 scribed, making in all twelve species of Cochliopa. 



Cochliopa hinkleyi new species. Fig. 4. 



The shell is minute, planorhoid, with a very wide, shallow um- 

 bilicus and a slightly concave spire. Color brownish corneous. The 

 three whorls are oval in section, the last descending slowly and at 

 the end, only very shortly in contact with the preceding. Sculp- 

 ture of numerous subequal, rather sharp spiral threads separated by 



