white.] PALEONTOLOGY CRETACEOUS FOSSILS. 319 



below to a small, sharply defined notch at the base of the truncated 

 columella, which seems to bear two small folds near its lower part, one 

 being formed by the twisted and truncated lower margin ; inner lip a 

 little thickened ; surface ornamented by distinct, regular, vertical folds 

 that are nearly or quite obsolete on the body -volution below its upper 

 part, and regular revolving hues quite well defined on the body-turn, 

 especially its lower part, and appear to be obsolete on those of the spire ; 

 lines of growth moderately distinct. 



" Length, 0.50 inch ; breadth, 0.20 inch ; angle of spire about 30°. 



"This species differs even more strongly from the last [A. gr eg aria] 

 than that form does from the species rJwmboides, having a much more 

 elevated spire and a proportionally smaller body- volution and aperture. 

 In ornamentation, however, the three forms are much alike. The spe- 

 cies here under consideration shows a somewhat more thickened inner 

 lip than «I have yet seen in either of the others. 



" For the reasons already explained, this and the last may have to 

 take the name Turricula gregaria, T. subfusiformis, if all three do not, 

 as suggested back, require to be grouped together as a new section, 

 under the names Admetopsis rhomboides, A. gregaria, and A. subfusiformis. 



" Locality and position. — Same as last." 



The figure illustrating this species on plate 9 was drawn by Mr. Meek, 

 and he had written the name Admetopsis subfusiformis under the figures. 

 All three of these forms are associated together in the same layers, and 

 after examining many examples I am much inclined to think that they 

 represent not more than two species at most. As to their generic rela- 

 tions, see remarks following the description of the last species. Figure 

 5 a, plate 3, represents a specimen from near Cedar City, Utah, which 

 Mr. Meek had identified as belonging to his A. gregaria. I have not 

 been able to find his type of that species among the collections, but 

 judging from his description and collections which I have made from 

 the typical locality at Coalville, Utah, I am not disposed to regard A. 

 gregaria as distinct from A. rliomboidea. I therefore use the name for 

 both these forms that comes first in the order of his descriptions. 



