OCHRODERMA. 329 



tieri as described by von Martens in color, but seems to be 

 the same species. Probably 0. martensi is a dextral form of 

 0. pit tieri. 



4. 0. MARTENSI Dall. PI. 47, figs. 22, 23, 24. 



' ' Shell small, of a yellowish-green color, polished, with 5% 

 whorls, a rather blunt apex and distinct suture ; under mag- 

 nification the upper whorls are seen to be minutely axially 

 wrinkled, most distinctly so in front of the suture, but in the 

 later whorls this sculpture becomes obsolete. There is also a 

 fine, obscure, spiral striation, and in certain spots, under 

 magnification, the two series of lines form a faint reticula- 

 tion. The shell has much the general form of Cochlicopa 

 lubrica, the aperture is small, semilunate, the pillar obliquely 

 truncated, somewhat thickened at the twisted edge; on the 

 body is a very prominent projecting lamina which extends 

 inside the shell for about one whorl, projects at the mouth 

 half-way 'to the outer lip and is united to the pillar and 

 outer lip by a thin callus ; the outer lip is not reflected, but is 

 not sharp-edged in the adult; directly opposite the parietal 

 lamella is a single thickened spiral ridge, but little elevated, 

 and extending inward about one-third of the last whorl. Alt. 

 of shell 10, of aperture 4.25 ; lat. of shell 4, of aperture 2 

 mm." (Dall). 



Cocos Island, under stones (Snodgrass and Heller). 



Leptinaria (Neosubulina) martensi DALL, Proc. Acad. Nat. 

 Sci. Phila., 1900, p. 97, pi. 8, f. 10 (April 16, 1900). 



"An immature dextral specimen among the seven sinistral 

 L. pittieri v. Marts, may have belonged to this species. It 

 differs from that species by being dextral, by having a mouth 

 larger in proportion to the spire, and in having one less whorl 

 in a somewhat greater length" (Dall). 



The type figure is copied, fig. 22. Another specimen of 

 the original lot is drawn on a large scale, fig. 24, length 10, 

 diam. 4, aperture 4.2 mm., with 5% whorls. The parietal 

 lamella enters slightly less than one whorl. Within the mouth 

 a low, inconspicuous thickening on the outer lip, entering the 

 throat, may be seen on careful inspection. 



