140 CALIFORNIA ACADEMY OF SCIENCES. 



may have obtained it on one of the islands, but Xantus 

 can scarcely have overlooked it, and Eisen informs me 

 that he never was at Cape St. Lucas until 1893, and he 

 got nothing like it there. The specimens found abund- 

 antly at Hermosillo, Mexico, by him, which I called a 

 var. of B. alternatus Say, may possibly be referred to, but 

 do not agree in every particular with the description. 



BuLiMULUS suFFLATUS W. G. Binney. 



Specimens of the young of this species much resemble 

 B . xaniiisi, but have more swollen and obtuse whorls, the 

 epidermis being also thinner and quite smooth, pale and 

 shining. Numerous half -grown living specimens from 

 El Taste Mountains, at about 3,200 feet altitude, have 

 the thin alternately -striped epidermis entire, and varv 

 largely in size of umbilicus. (See pi. v, fig. 11.) When 

 larger, some examples are much more swollen than the 

 typical B . sitfflatus, and have only a few strips of epider- 

 mis left, as in fig. 9. Four dead, bleached shells from 

 El Chinche Mountains, at 2,000 feet altitude, approach 

 nearer to large B . ^ihila, and are evidently mature, with 

 thickened lips. One is figured in fig. 10, and they may be 

 called var. chinchensis. The nearest to typical B. ptlula 

 is from near San Jose del Cabo, and shown in fig. 12. 

 Figs. 15 and 16 are of shells from El Taste Mountains, 

 3,200 feet high, and bleached, which may be varieties of 

 some here named, but until more perfect shells are ob- 

 tained must be uncertain. 



The much larger form called by me var. iimihin's in 

 article No. 3, p. 340, figured on pi. xiv, fig. 6, is very 

 similar to fig. 10, except in size, and approaches tigs. 15 

 and 16. 



CoLUMNA (ramentosa?) abbreviata J. G. C. 



Only four examples of this form were found on the El 



