170 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



KEY TO THE SUBSPECIES OF CHRISTOPHIPOMA BERTINI 



Shell broadly ovate bertini 



Shell elongate-ovate gracillimum 



CHRISTOPHIPOMA BERTINI BERTINI (Maltzan) 



Plate 28, Figure 13 



1888. Choanopoma bertini Maltzan, Nachr. deutschen malak. Ges., vol. 20, p. 181 

 1920. Annularia (Annularella) bertini Henderson and Bartsch, Proc. U. S. Nat. 

 Mus., vol. 58, p. 74. 



This subspecies is broadly ovate and is marked with small brown 

 spots arranged in both axial and spiral series. It is also faintly rayed. 

 The last whorl has yy of the lamellar axial ribs between which one to 

 six weaker axial threads are present. The spiral sculpture is indicated 

 by four very feeble nodules on the upper portion of the whorls. The 

 umbilicus has eight strong spiral cords. 



The specimen figured (U.S.N.M. No. 122962) was collected by 

 Henderson and Simpson at Sans Souci, Haiti. It has 5.5 whorls re- 

 maining and measures: Height, 13.2 mm.; greater diameter, 10.3 mm.; 

 lesser diameter, 6.7 mm. 



The broadly ovate shape will readily distinguish this from the other 

 subspecies. 



U.S.N.M. No. 162961 contains 37 specimens from the same source. 



U.S.N.M. No. 504132 contains 5 semifossil specimens collected by 

 Henderson at Cap-Haitien. 



CHRISTOPHIPOMA BERTINI GRACILLIMUM (Maltzan) 



Plate 28, Figure 12 



1888. Choanopoma bertini gracillima Maltzan, Nach. deutschen malak. Ges., 



vol. 20, p. 181. 

 1920. Annularia (Annularella) bertini gracillima Henderson and Bartsch, Proc. 



U. S. Nat. Mus., vol. 58, p. 74. 



Shell elongate-ovate, flesh-colored, marked with distantly spaced, 

 small spots of brown, which are arranged in axial and spiral series. On 

 the last whorl of this subspecies the differentiation between the coarser 

 and finer spiral threads is less pronounced than on the early ones, where 

 two to five are present between the stronger lamellar elements. Of the 

 strong ribs, 127 are present on the last turn in the individual figured. 

 There are four feeble nodules on the ribs near the summit and 11 spiral 

 cords in the umbilicus. 



The specimen figured (U.S.N.M. No. 162963) was collected by 

 Henderson and Simpson at La Ferriere, Haiti. It is a complete specimen 

 having 7 whorls and measures : Height, 16.5 mm. ; greater diameter, 

 lo.o mm. ; lesser diameter, 8.0 mm. 



The more slender shape will readily distinguish this from typical 

 hertini. 



U.S.N.M. No. 162964 contains 59 specimens from the same source. 



