44 AMERICAN JOURNAL 



writes, "Appears to be a rather common species in some locali- 

 ties, of which I possess some hundreds of specimens." 



The beautiful specimen which Mr. Keeve has described as 

 lo spirostoma is only a distortion of this species. I have seen 

 several specimens which exhibit the same form of growth in 

 a less marked degree. Mr. Keeve himself suspects their spe- 

 cific identit}^. 



5. lo TURRITA, Anthony. 



Plate 4. Fig. 12, 



This species is certainly further removed from the ordinary 

 type of lo than any of the others; its graceful, slender form, 

 long spire of many whorls, and sharp spines, serve readily to 

 distinguish it. Mr. Reeve's fig. 19 5. of this species, does not 

 represent it however, but is decidedly a spinosa. I have seen 

 the original of this figure. 



The species is a rare one. Mr. Anthony possesses only the 

 type specimen, but several fine individuals occur in Mr. Lea's 

 collection. A specimen is also in the Museum of the Academy 

 of Natural Sciences. 



