300 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 89 



ANNULARIA (ANNULAROPS) BLAINI BLAINI ([Gundlach] Pfeiffer) 



Plate 32, Figure 8 



1863. Choanopoma blaini [Gundlach] Pfeiffer, Malakozool. Blatter, vol. 10, 



pp. 191-192. 

 1920. Annularia (Annularops) blaini Henderson and Bartsch, Proc. U. S. Nat. 



Mus., vol. 58, p. 74. 



This subspecies inhabits the Sierra de La Giiira and the mogotes 

 adjacent to it. At first sight this shell may be confused with its 

 neighbor, A. (A.) semicana semicana, with which it agrees in size. 

 The open umbilicus, owing to the absence of the cut in the middle of 

 the outer peristome of the inner lip and to the absence of its reflection 

 over the umbilicus, will easily differentiate it from that shell. The 

 specimen figured is one of a series, U.S.N.M. No. 356265, and has 3.8 

 whorls remaining which measure: Length, 17.2 mm.; greater diameter, 

 12.2 mm.; lesser diameter, 9.7 mm. Its large size will easily distin- 

 guish it from A. (A.) blaini cumbrensis. 



Gundlach states of this subspecies (Malakozool. Blatter, vol. 10, 

 p. 192, 1863): "After showers this moUusk can be found upon large 

 stones in the crevices of which it withdraws in unfavorable seasons. 

 Anmial dark gray with whitish dots which group themselves into spots 

 upon the foot and head. Head rose red within. Forehead with a 

 dark suffusion. Tentacles coral red with blackish tip." 



ANNULARIA (ANNULAROPS) BLAINI CUMBRENSIS. new subspecies 



Plate 32, Figure 2 



This race, which was collected by Henderson on La Cumbre, is 

 much smaller than typical A. (A.) blaini blaini. It also has the axial 

 riblets much finer and more closely spaced and the spiral threads 

 obsolete. 



The type, U.S.N.M. No. 356161, has 3.5 whorls remaining and 

 measures: Length, 10.7 mm.; greater diameter, 7.1 mm.; lesser diam- 

 eter, 5.9 mm. 



ANNULARIA (ANNULAROPS) TRYONI (Arango) 



Shell elongate-ovate, pale yellow. Nuclear whorls 2, strongly 

 rounded, smooth, microscopically granulose. Postnuclear whorls 

 moderately inflated, strongly rounded, marked by rather strong, 

 sublamellar, almost vertical axial riblets, of which 104 occur on the 

 first, 140 on the second, and 164 on the last whorl in the type of A. (A.) 

 tryoni tryoni, and 76 on the first, 104 on the second, and 184 on the 

 last of the remaining whorls in A. (A.) tryoni vinalensis. The axial 

 riblets are a little more strongly developed near the summit and the 

 suture than on the middle of the turns. The spiral sculpture consists 

 of poorly developed threads, of which 8 are present on the last whorl 



