20 BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



but has fewer and stronger ribs. On the last whorl of this race 80 axial 

 ribs are present, while in Chondropoma (Chondropomonis) petitianum 

 hispaniolae I count 110 on the same turn. 



The type (U.S.N.M. No. 471984) has 5.5 whorls remaining and 

 measures : Length, 14 mm. ; greater diameter, 6.7 mm. ; lesser diameter, 

 5.2 mm. 



U.S.N.M. No. 471985 contains 33 topotypes from the same source. 



CHONDROPOMA (CHONDBOFOMORUS) PETITIANUM HISPANIOLAE 



Clench and Aeuayo 



Plate 2, Figure 1 



1937. Chondropoma (Chondropomorus) hispaniolae Clench and Aguayo, Mem. 

 Soc. Cubana Hist. Nat., vol. 11, No. 2, pp. 64-65, pi. 7, figs. 1, 2. 



This race comes from the region of Sans Souci and La Ferriere, Haiti. 

 The type locality is Milot. 



It has the umbilicus very narrow and the axial ribs closely crowded, 

 and it differs from the very closely related Chondropoma (Chondropo- 

 monis) petitianum dessalinesi in having a much larger number of axial 

 ribs. For example, the specimen figured has no on the last whorl, while 

 dessalinesi has only 80 on the same turn ; otherwise they resemble each 

 other in every feature. 



The figured specimen (U.S.N.M. No. 471981) was collected by John 

 B. Henderson at Sans Souci. It has almost 6 whorls remaining and 

 measures : Length, 14.9 mm. ; greater diameter, '/.3 mm. ; lesser diam- 

 eter, 5.5 mm. 



U.S.N.M. No. 471982 contains 393 specimens from the same source. 



U.S.N.M. No. 162929 contains 51 specimens collected by Henderson 

 and Simpson. 



U.S.N.M. No. 162930 contains 7 specimens collected by Henderson 

 and Simpson at La Ferriere. 



CHONDROPOMA (CHONDROPOMORUS) PETITIANUM PETITIANUM (Pfeiflfer) 



Plate 2, Figure 2 

 1850. Cyclostoma petitianum Pfeiffer, Zeitschr. Malak., vol. 7, pp. 78-79. 

 1854. Cyclostoma petitianum Pfeiffer, Martini-Chemnitz Conchylien Cabinet, ed. 

 2, vol. 1, sect. 19, pp. 277-278, pi. 37, figs. 23-24. 



This race was collected by Salle in the Dominican Republic, the exact 

 locality being still in doubt. Our figure is from the type in the British 

 Museum. It differs from the other subspecies in having the intercostal 

 spaces no wider than the axial ribs. 



The type has 5 whorls remaining and measures: Length, 13.2 mm.; 

 greater diameter, 6.4 mm. 



CHONDROPOMA (CHONDROPOMORUS) CARICAE Pfdffer 



Shell elongate-conic, flesh-colored with spiral series of faint oblique 

 brown spots on the spire and narrow interrupted spiral bands of brown 



