HISPANIOLAN AND BAHAMAN ANNULARIIDAE 105 



U.S.N.M. No. 355310 contains i specimen collected by Hermann RoUe 

 at Port-au-Prince. 



U.S.N.M. No. 35531 1 contains 3 specimens from Port-au-Prince from 

 the Prime Collection. 



U.S.N.M. No. 529452 contains 2 specimens received from Sowerby 

 and Fulton. 



U.S.N.M. No. 355310 contains i specimen collected by Henderson 

 back of L'Arcahaie. 



HAITIPOMA EUTYCHES (PUsbry) 



Shell elongate-ovate, varying in color from w^hite to pale yellow. 

 Nuclear w^horls decollated in all our specimens. Postnuclear w^horls in- 

 flated, strongly rounded, narrowly shouldered at the summit, and marked 

 by retractively curved, sublamellar axial riblets, which are rather dis- 

 tantly spaced, of which several fuse to form sharp, strong, exserted cusps 

 at the summit. The spiral sculpture consists of tufts about as strong as 

 the axial riblets, which render the axial riblets nodulose. The spaces 

 enclosed between the axial ribs and spiral threads are more or less 

 squarish pits, sometimes rectangular. Suture deeply channeled. Periph- 

 ery strongly rounded. Base inflated, strongly rounded, and marked by 

 the junction of the axial ribs and spiral threads, the number of which, 

 as those on the spire, vary in the different subspecies. The umbilical wall 

 also bears spiral threads. The last whorl is decidedly solute for almost 

 half a turn. Aperture oval; peristome double, the outer a little more 

 expanded on the basal portion of the inner lip than on the rest, forming 

 a conspicuous auricle at the posterior angle; inner peristome exserted 

 and slightly reflected. Operculum typically haitipomid. 



I am recognizing three subspecies, which the following key and de- 

 scriptions will help to differentiate : 



KEY TO THE SUBSPECIES OF HAITIPOMA BUTYCHES 



Suture broadly channeled. 



Whorls decidedly inflated wetmorei 



Whorls not decidedly inflated eutyches 



Suture not broadly channeled rabelense 



HAITIPOMA EUTYCHES WETMOREI, new subspecies 



Plate 15, Figure 2 



This subspecies was collected by Dr. Alexander Wetmore at the 

 Pettigrew Plantation at Fort Liberte in northwestern Haiti. It has the 

 suture very deeply channeled and very strong ribs and spiral threads 

 and is rather more chubby than the other two races. 



The type (U.S.N.M. No. 504030) has 4.3 whorls remaining, the last 

 of which bears 104 axial riblets, 8 spiral threads between summit and 

 periphery, 9 on the base, io-[- on the umbilical wall. It measures : Height, 

 13.0 mm. ; greater diameter, 7.3 mm. ; lesser diameter, 6.3 mm. 



U.S.N.M. No. 403882 contains 8 topotypes from the same source. 



