210 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



KEY TO THE SUBSPECIES OF OPISTHOSIPHON (CUBITASIPHONA) BERRYI 



Posterior half of inner lip of the outer peristome flaringly expanded 



to almost cover the umbilicus vig^etense 



Posterior half of inner lip of the outer peristome not flaringly ex- 

 panded but strongly inbent to partly cover the umbilicus. 



Axial ribs moderately strong berryi 



Axial ribs very fine transitorium 



OPISTHOSIPHON (CUBITASIPHONA) BERRYI VIGUETENSE, new subspecies 



Plate 17, Figure 8 



This subspecies is easily differentiated from the others by its larger 

 size and pale color. Bartsch collected a large series of specimens at 

 La Vigueta, on the north side of the Cubitas Mountains, between 

 Paso de la Guanaja and Los Paredones. 



The type, U.S.N.M. No. 535478, has 41 axial ribs on the first of 

 the remaining turns and 132 on the last; it has 4.1 whorls remaining 

 and measures: Length, 14.3 mm.; greater diameter, 9.0 mm.; lesser 

 diameter, 7.2 mm. 



OPISTHOSIPHON (CUBITASIPHONA) BERRYI BERRYI Clapp 



Plate 17, Figures 9, 10 



1919. Opisthosiphon berryi Clapp, Nautilus, vol. 32, p. 86, pi. 7, fig. 14. 



1920. Opisthosiphon berryi Henderson and Bartsch, Proc. U. S. Nat. Mus., 



vol. 58, p. 67. 



1920. Opisthosiphon (Opisthosiphona) berryi semiapertus (Torre and Henderson) 



Henderson and Bartsch, Proc. U. S. Nat. Mus., vol. 58, p. 67. 



1921. Opisthosiphon (Opisthosiphona) berryi Torre and Henderson, Proc. U. S. 



Nat. Mus., vol. 59, p. 248, pi. 38, figs. 1-4. 

 1921. Opisthosiphon (Opisthosiphona) berryi semiapertum Torre and Henderson, 

 Proc. U. S. Nat. Mus., vol. 59, pp. 249-250, in part, pi. 38, figs. 5-8. 



This subspecies has a wide distribution. It was described from col" 

 lections made by Dr. S. S. Berry at Cairije, Cerro de Tuabaquey, at 

 the eastern end of the Cubitas Mountains. Bartsch collected it at 

 Los Corrales de Cangilones. It appears to range through the rock 

 piles of the southeastern part of the Cubitas Mountain region, includ- 

 ing the passes of Vereda de los Burros and de la Guanaja. 



Study of a large amount of material now in our collection compels 

 us to fuse Opisthosiphon (Opisthosiphona) berryi semiapertum with the 

 typical subspecies. 



In this race the posterior half of the inner lip of the outer peristome, 

 while expanded, does not almost cover the umbilicus, but it is inbent 

 to partly cover it. In this respect it differs from 0. (C.) berryi vigue- 

 tense. Opisthosiphon (Cubitasiphona) berryi transitorium has the 

 axial ribs much finer. 



In the specimen figured, U.S.N.M. No. 355475, which is one of the 

 original lot, the first whorl shows 70 axial riblets, while the last whorl 



