HISPANIOLAN AND BAHAMAN ANNULARIIDAE 83 



simple, slightly auriculated at the posterior angle, and a little more 

 broadly expanded on the inner and basal lip than on the rest. Oper- 

 culum as described in the generic definition. 



This species appears confined to Haiti. Representatives of it are known 

 from the north coast of the island, the Cul-de-Sac region, and the island 

 of Gonave. 



I am recognizing five subspecies, which the following key and descrip- 

 tions will help to differentiate : 



KEY TO THE SUBSPECIES OF HISPANIPOMA QUATERNATUM 



Tufts at summit of whorls very closely approximated quaternatum 



Tufts at summit of whorls not very closely approximated. 

 Denticles at summit very strong. 



Suture strongly channeled dentilobatum 



Suture not strongly channeled monticolum 



Denticles at summit not very strong. 



Shell elongate-ovate cabaretense 



Shell ovate charmettense 



HISPANIPOMA QUATEBNATCM QUATERNATUM (Lamaxck) 



Plate 14, Figure 13 



1822. Cyclostonia quaternata Lamarck, Histoire naturelle des animaux sans 



vertebres, vol. 6, pt. 2, p. 147. 



1842. Cyclostoma quaternata Delessert, Recueil de coquilles . . ., pi. 29, fig. 3. 



1847. Cyclostoma quaternata Sowerby, Thesaurus conchyliorum, p. 149, pi. 28, 



figs. 178, 179. 



1848. Cyclostoma quaternata Pfeiffer, Martini-Chemnitz Conchylien Cabinet, vol. 



1, sect. 19, p. 81, pi. 10, figs. 12, 13. 



1850. Cistula quaternata Gray, Nomenclature of molluscous animals and shells 



in the collection of the British Museum, p. 59. 



1851. Tudora quaternata Pfeiffer, Zeitschr. Malak., vol. 8, p. 167. 



1863. Chondropoma quaternata Reeve, Conchologia iconica, pi. 8, fig. 60. 

 1920. Parachondria (Parachondria) quaternata Henderson and Bartsch, Proc. 

 U. S. Nat. Mus., vol. 58, p. 66. 



This subspecies ranges from the Peterborough Mountains north of 

 Gonaives, south through St. Marc through the Cul-de-Sac region to 

 Fond Parisien and Fonds Verettes. 



It is the largest subspecies, usually with an orange tinge. Here, too, 

 the tufts at the summit are more inclined to be appressed to the preced- 

 ing turn than in the other races. 



The specimen figured (U.S.N.M. No. 3553i6) is one of 70 that 

 Henderson and I collected at Trou Caiman near Thomazeau. It has 

 a little over 4 whorls remaining and measures : Height, 19.7 mm. ; greater 

 diameter, ii.o mm.; lesser diameter, 9.8 mm. It has 150 axial ribs on 

 the last whorl and 16 spiral threads between the summit and the periph- 

 ery of the same whorl. The axial and spiral sculpture on the base of the 

 last whorl in this subspecies is usually feebly developed, sometimes ob- 



