494 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



The type (U.S.N.M. no. 104347) has lost its first whorl. The 5.1 

 remaining measure: Length, 63.5 mm; greater diameter, 37.9 mm. 



The specimen was collected by Lieutenant Febiger. It has no 

 specific locality data with it. 



COCHLOSTYLA (CHRYSALLIS) ALBOLABRIS ALBOLABRIS Bartsch 



Plate 111, Figure 6 



1932. Cochlostyla (Chrysallis) albolabris albolabris Bartsch, Journ. Washington 

 Acad. Sci., vol. 22, p. 341. 



Shell elongate-ovate. The nuclear whorls white; the early post- 

 nuclear whorls buff with a narrow brown band at the summit ; the rest 

 of the postnuclear whorls chestnut-brown marked by bands of yellow- 

 ish buff, which vary decidedly in slant. On some parts of the whorls 

 they are protractively and on other parts retractively slanting. They 

 are also of irregular width and spacing and extend on the last turn from 

 the summit to the umbilicus. Interior of aperture white with a bluish 

 tinge. This color extends over the expanded peristome to the very 

 edge, which is brownish. The shell is covered by a very thin perios- 

 tracum. Nuclear whorls 3, the first well rounded, smooth; the next 

 showing the beginning of lines of growth, which become intensified on 

 the last nuclear whorl where they practically merge into the post- 

 nuclear sculpture. The postnuclear whorls are marked by irregular 

 lines of growth, which scarcely merit the term of threads. These are 

 of irregular strength and spacing. They are also marked by micro- 

 scopic crisscross sculpture, which cuts these lines of growth obliquely, 

 both protractively and retractively, both on spire and base. The 

 aperture is moderately large. The outer lip is expanded and reflected ; 

 the inner lip also expanded, broadly so at its insertion where it is 

 reflected and leaves only a chink of the umbilicus. The parietal wall 

 is covered by a thin callus, which permits the color pattern of the parie- 

 tal wall to shine through, which protects the color pattern of the 

 parietal wall with a translucent glaze. 



The type (U.S.N.M. no. 104346) has 6.1 whorls and measures: 

 Length, 61 mm; greater diameter, 32.7 mm. 



COCHLOSTYLA (CHRYSALLIS) ANTONI Semper 



Shell ovate to elongate-ovate, varying in the known races from ovate 

 to elongate-ovate. The nuclear turns and the early postnuclear whorls 

 are flesh-color; the later turns are straw-color with hydrophanous 

 bands of a little paler or darker shade. The entire surface of the shell 

 is co/ered by a thin greenish-yellow periostracum. The aperture is 

 white within and also white on the reflected peristome. The nuclear 

 whorls are well rounded. The postnuclear whorls are marked by re- 

 tractively slanting lines of growth, which are irregular in strength and 

 spacing. There are also fine, somewhat crinkly, feebly incised, spiral 



