236 



BULLETIN 192, UNITED STATES NATIONAL MUSEUM 



U.S.N.M. No. 420171 contains 60 specimens collected by Maynard 

 on the south shore on both sides of Blue Hill, New Providence. 



U.S.N.M. No. 124356 contains 7 specimens collected by Nuttall at 

 Nassau. 



U.S.N.M. No. 355438 contains 6 specimens from the Ford Collection 

 from New Providence. 



U.S.N.M. No. 348678 contains 2 specimens collected by C. C. Allen 

 on the south beach of New Providence. 



U.S.N.M. No. 180677 contains a deformed specimen shown on plate 

 37, figure 9, collected by Owen Bryant on the Grantstown Road, Nassau. 



OPISTHOSIPHON (OPISTHOSIPHON) BAHAMENSI8 EXUMAENSIS, 

 new subspecies 



Plate 37, Figure 11 



In strength of sculpture, this race resembles typical pisthosiphon 

 (Opisthosiphon) bahamensis bahamcnsis. It differs from this, however, 

 in being much more globose and in having the ribs and spiral threads 

 even stronger, and the denticles at the summit not exserted. The type has 

 60 axial ribs on the first, 80 on the second, and 88 on the last of the re- 

 maining turns. 



The type (U.S.N.M. No. 355441) was collected by J. J. Brown on 

 Exuma Island, Bahamas. It has a little more than 3 whorls and measures : 

 Length, 10.6 mm. ; greater diameter, 6.3 mm. ; lesser diameter, 4.8 mm. 



Eighteen topotypes (U.S.N.M. No. 53612 and 355528) yield the fol- 

 lowing measurements : 



OPISTHOSIPHON (OPISTHOSIPHON) PHOENICOPTERUS, new species 



Shell small, horn-colored or white. Nuclear whorls 2, well rounded, 

 small. Postnuclear whorls inflated, strongly rounded, and broadly shoul- 

 dered at the summit, marked by decidedly retractively curved axial ribs, 

 which are rather strong in O pisthosiphon (Opisthosiphon) p. phoenicop- 

 terus and feeble in O. (0.) p. nutricius. The spiral sculpture consists 

 of rather strong threads equaling the riblets in strength in phoenicop- 

 terus and feeble threads in mitricius. Sature channeled. Periphery 

 strongly rounded. Base moderately long, narrowly openly umbilicated, 

 and marked by the continuation of the axial riblets and spiral threads. 

 Additional spiral threads are present on the umbilical wall. Aperture 

 very broadly oval, almost circular; peristome double, the outer broadly 

 expanded, only a trifle wider on the inner lip than the outer, forming 



