236 APPENDIX, VOL. XXVI. 



STERKIA BAKERI n. sp. PL 24, figs. 1, 2, 3. 



The shell is thin, straightly rimate, imperforate, cylindric, 

 ochraceous-tawny ; surface very weakly but regularly striate, 

 with traces of weak granulation in places. The whorls are 

 strongly convex. The aperture is obstructed by five teeth. 

 The angular lamella is strong and high, curved, much shorter 

 than the parietal lamella, which is high and long, entering 

 very deeply. The columellar lamella is situated high, and 

 slants rapidly upwards within. Upper-palatal fold is strong, 

 rather long, marked externally by a slight depression. The 

 lower-palatal is much more deeply placed, about equal to the 

 upper. The peristome is tawny, reflected, the outer margin 

 bent in a little in the middle. Length 1.9, diam. 0.9 mm. ; 

 fully 5 whorls. 



Mexico: southern part of the State of Vera Cruz, Canton 

 of Acayucan, at the Hacienda de Cuatotolapan, between the 

 Rio San Juan and its tributary the Arroyo Hueyapan (H. 

 Burrington Baker). 



In its proportions, the diameter about half of the length, 

 this species resembles 8. rhoadsi. It differs by the more ob- 

 tuse summit, the more distinctly striate surface and the 

 stronger and longer teeth, of which the lower palatal is more 

 deeply immersed. The inner end of the parietal lamella is 

 not visible in an obliquely basal view in the aperture, but it 

 also passes out of sight inward in 8. rhoadsi, though weaker 

 within than the present species. 



8. antUlensis is a shorter, broader shell, with less immersed 

 lower-palatal fold. The parietal lamella is long, as in rhoadsi 

 and bakeri. In 8. eyriesi the parietal is distinctly shorter. 



The tropical American Sterkiae evidently form a complex 

 of intimately related races. It is not possible to judge their 

 specific distinctions by the very small number of specimens 

 now known, from a few widely separated localities. 



TRUNCATELLINA CYLINDRICA (Fer.). Page 65. Reference to 

 figures should be : PL 8, figs. 3, 4, 8. 



Locard has distinguished the varieties major, mmor, curta 

 and ventricosa, "defined by their names," and probably from 



