HISPANIOLAN AND BAHAMAN ANNULARIIDAE 19 



CHONDBOPOMA (CHONDKOPOMOBUS) PEXITIANUM COSTATUM Weinland 



Plate 2, Figure 4 

 1880. Chondropoma petitianum costata Weinland, Jahrb. deutschen malak. Ges., 



vol. 7, p. 346. 

 1933. Chondropoma trachyderma Pilsbry, Proc. Acad. Nat. Sci. Philadelphia, vol. 

 85, p. 123, pi. 6, fig. 10. 



This subspecies comes from the Samana Bay region, Dominican Re- 

 public. It is easily distinguished from the other members of the group 

 by its distantly spaced axial riblets. 



The specimen figured (U.S.N.M. No. 4719^6) is one of 20 collected 

 by Gerrit S. Miller, Jr., at San Gabriel on the south shore of Samana 

 Bay. It has 5.5 whorls remaining and measures: Length, 13.5 mm.; 

 greater diameter, 7 mm. ; lesser diameter, 5.8 mm. 



U.S.N.M. No. 426038 contains i specimen collected by William M. 

 Gabb at Santo Domingo. 



U.S.N.M. No. 471987 contains 27 specimens collected by W. L. Abbott 

 on San Gabriel Islet, Samana Bay. 



U.S.N.M. No. 471988 contains 9 specimens collected by W. L. Abbott 

 12 miles northwest of Sanchez, Samana Bay. 



CHONDBOPOMA (CHONDBOPOMOBUS) PETITIANUM DOMINICUM, 



new subspecies 



Plate 2, Figure 6 



This race, which comes from the region of Puerto Plata, Dominican 

 Republic, and the coast line east to Sosua, is distinguished from the 

 other members of the closely spaced, axially ribbed forms by having the 

 umbilicus comparatively broad. 



The type (U.S.N.M. No. 493309) comes from Puerto Plata and was 

 received from the H. Prime Collection. It has 4.8 whorls remaining and 

 measures: Length, 12 mm.; greater diameter, 6.7 mm.; lesser diameter, 

 5,1 mm. 



U.S.N.M. No. 493310 contains 13 topotypes from the same source. 



U.S.N.M. No. 49331 1 contains 4 specimens from the type locality from 

 the Sanderson Smith Collection. 



U.S.N.M. No. 336763 contains 19 specimens collected by W. L. Abbott 

 among coral debris i to 2 miles from the sea at 50 to 150 feet altitude 

 in grassland and secondary jungle, at Sosua, 16 miles east of Puerto 

 Plata. 



U.S.N.M. No. 529442 contains 3 specimens labeled "Haiti." 



CHONDBOPOMA (CHONDBOPOMOBTJS) PETITIANUM DESSAUNESI, 



new subspecies 



Plate 2, Figure 3 

 This subspecies Henderson and Bartsch collected on the hills at 

 Thomazeau in the Cul-de-Sac. 



It closely resembles the northern race in size, shape, and coloration 



