86 



BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



we described as gonavicola. It is a stout race, smaller than typical 

 quaternatmn. 



The specimen figured (U.S.N.M. No. 504000) has 180 axial ribs on 

 the last turn. It has 6 spiral threads on the first and 10 on the second 

 whorl, while on the last they are too obsolete to be counted. There are 

 12 fairly strongly developed cords on the umbilical wall. The specimen 

 figured is the type of gonavicola. It has a little over 3 whorls and meas- 

 ures : Height, 14.9 mm. ; greater diameter, 9.5 mm. ; lesser diameter, 

 7.9 mm. 



Forty-nine additional specimens yield the following average measure- 

 ments : 



U.S.N.M, No. 314944 contains i specimen collected by Dr. W. L, 

 Abbott on Gonave Island. 



U.S.N.M. No. 355329 contains 32 specimens collected by Dr. W. L. 

 Abbott on Gonave Island. 



U.S.N.M. No. 355330 contains 17 specimens collected by Dr. W. L. 

 Abbott near Anse a Galets. 



U.S.N.M. No. 381015 contains i specimen collected by Eyerdam i 

 mile northeast of Point-a-Raquette. 



U.S.N.M. No. 425368 contains i specimen collected by Eyerdam on 

 Gonave Island. 



HISPANIPOMA QUATEBNATUM MOXTICOLUM, new sabspecies 



Plate 14, Figure 3 



This subspecies Henderson and I collected at Petionville, and C. R. 

 Orcutt gathered specimens at "Mount Traverse," which is somewhere 

 between Fonds Verettes and Saltrou, probably on the eastern side of 

 the mountain. 



The type (U.S.N.M. No. 35533S) comes from Petionville. It has a 

 little over 4 whorls remaining and measures: Height, 14.5 mm.; greater 

 diameter, 7.5 mm.; lesser diameter, y.2 mm. It has 137 axial ribs on 

 the last turn and 11 spiral threads between the summit and the periph- 

 ery on the last turn, and 12 on the base and 15 on the umbilical wall. 

 The latter are less strong than those on the base. 



This race is readily distinguished from the other subspecies by its 

 much stronger spiral sculpture. 



