634 PROCEEDINGS OF THE ACADEMY OF [DeC, 



Dohrn, and in the mature specimen it can be distinguished on the 

 early whorls within the umbilicus. 



Alt. 13, greatest diam. 27, least diam. 22. .5, diam. of the umbilicus 

 within the last whorl 5 mm. 



One mature living and eight immature specimens were taken 

 between Camps 38 and 39, M. & M. R. R., and two immature speci- 

 mens at Camp 46. 



Dr. von Ihering's var. juruana was taken at a point about half way 

 between the original location and these points on the Madeira and 

 Mamore Rivers. 



Solaropsis sp. undet. 



A single specimen of this genus, too young to identify, taken at 

 Para, was sent from the Goeldi Museum. 



Genus PSADARA. 

 Psadara derbyi cearana n. subsp. Pi. XXII, fig. 19. 



A single mature specimen "from the State of Ceara" was sent by 

 Mr. Rocha and a half-grown specimen was taken on the Maranguape 

 Mountain. It differs from the type by being larger, with fewer whorls . 

 Comparative measurements follow: 



P. derbyi v. Ihering, whorls 4^, diam. 12 mm. 



P. derbyi cearana, whorls 4J, greatest diam. 16.5, least diam. 13.7, 

 alt. 8.25 mm. 



Genus STROPHOCHEILUS Spix. 

 Strophocheilus (Borus) maximus (Sowerby). 



Cochlogena maxima Sby., Appendix to Tank. Cat., p. 7 (1825, unrecognizable 



description) . 

 Bulinus maximus Sby., Conch. Illustr., fig. 63 (1841?). 

 Strophocheilus (Borus) maximus Sby., Pilsbry, Man. Conch. (2), X, p. 1.5, 



pi. 4, fig. 5. 



A single living specimen was taken between Camps 45 and 46, 

 Madeira & Mamore R. R., and dead specimens were taken quite 

 commonly all the way from Camp 39 to Camp 43. 

 strophocheilus (Borus) cantagallanus (Rang). 



Helix cantagallana Rang, Ann. Nat. Sci., XXIV, p. 50 (1831). 

 Strophocheilus (Borus) cantagallanus (Rang), Pilsbry, Man. Conch. (2), X, 

 p. 22, pi. 16, fig. 24; pi. 17, figs. 28, 29. 



A single dead specimen was taken at Carnaubinha near the head 

 of the Natal estuary, 

 strophocheilus (Borus) oblongus (MuUer). 



Helix oblonga Miiller, Hist. Vermium, II, p. 86, and of Gmelin, Born and 



Dillwyn. 

 Strophocheilus (Borus) oblongus (MuUer) Pilsbry, Man. Conch. (2), X, p. 



29, pi. 14, figs. 70-73. 



