PSEUDOSUBULINA. 9 



f. 20. Pseudosubulina eiseniana Cooper. DALL, Proc. U. ST 

 Nat. Mus. xix, p. 364, 1896. 



" Fourteen found by Dr. Eisen under stones living, but the 

 epidermis being destroyed by alcohol, they do not have exactly 

 the color of fresh ones." (Cooper.) 



Dr. Dall states that this species and the next have the nu- 

 clear whorls delicately ribbed. P. eiseniana has no jaw ; ra- 

 dula with 13,1,13 slender, arched, needle-like teeth. 



15. P. TASTENSIS (Cooper). PI. 6, fig. 33. 



"Shell dextral, much elongate, white, translucent, nuclear 

 whorls as in M. eiseniana, third less narrowed, sculpture 

 nearly similar, whorls 14 to 16, longer and less oblique, 14 of 

 them equaling 16 in that species. Outline of whorls flatter, 

 mouth vertically longer, body-whorl not contracted, peristome 

 not continuous, the lip being separated by the parietal wall 

 about 1-20 of an inch. Whole shell a fifth longer, with the 

 same number of whorls. Length 0.74 inch, breadth 0.08 ; 

 mouth 0.10 long, 0.06 wide." (Cooper). 



Lower California : Six only were found at Saltito Pass, 

 just north of El Taste Mountains, at 3,200 feet altitude. 



Melaniella tastensis COOPER, Proc. Cal. Acad. Sci. 2d ser., 

 iv, p. 141, pi. 6, f. 21. (April 25, 1894). 



"In some the upper 6 or 7 whorls are much slenderer, 

 proportionately, than the rest, as if they were starved when 

 young, and often bent out of the straight course, as shown 

 in figure. 



' l Found under damp wood on the ground at the end of the 

 wet (summer) season. Only two of them have 16 whorls, one 

 13, and three 11, these being immature." (Cooper.) 



16. P. EXILIS (Pfeiffer). PI. 18, fig. 29. 



Shell minute, acicular, the apex obtuse, hyaline or very pale 

 corneous, under a lens seen to be longitudinally subarcuately 

 rib-striate, whorls 8 to 9, narrow, flattened, the last slightly 

 more than one-fifth the total length; columella subarcuate, 

 obliquely truncate at the base of the oval-elliptic aperture; 

 peristome simple, acute. Length 5.33, diam. 1.5, aperture 

 lx.5 mm. (Pfr.). 



