336 PROCEEDINGS OF THE NATIONAL MUSEUM Vol. 89 



ANNULARIA (TROSCHELVINDEX) MINIA ([Gundlacli] Poey) 



Plate 38, Figure 1 



1858. Cyclostoma minium [Gundlach] Poey, Memorias sobre la historia natural 



de la isla de Cuba, vol. 2, p. 4. 

 1861. Choanopoma minium Bland, Ann. Lyceum Nat. Hist. New York, vol. 7, 



p. 27. 

 1920. Annularia {Annidaria) minium Henderson and Bartsch, Proc. U. S. 



Nat. Mus., vol. 58, p. 73. 



Shell thin, elongate-ovate, pale orange with the spiral bands flecked 

 here and there with white; the cusps at the summit and the peristome 

 are yellowish white. Nuclear whorls 2, well rounded, smooth, form- 

 ing a rather high apex. Postnuclear whorls inflated, strongly rounded, 

 marked by almost vertical axial riblets, which vary considerably in 

 strength, and of which 2 or more unite at the summit into a slender 

 hollow cusp. The spiral sculpture consists of slender tlireads, of 

 which 9 occur between the summit and the suture on the last tmTi, 

 The junctions of the axial riblets and spiral threads scarcely form 

 nodules, but the impressed spaces between them give the shell an 

 almost malleated aspect. Periphery strongly rounded. Base moder- 

 ately long, strongly rounded, marked by the continuation of the axial 

 riblets and by 8 spiral threads. Eight additional spiral threads are 

 present on the umbilical wall, of which the outer 2 are much stronger 

 than the rest. The last whorl is decidedly solute for about one-sixth 

 of a turn. Aperture very broadly oval; peristome double, the inner 

 sHghtly exserted and slightly reflected; the outer well expanded all 

 around except on the parietal wall, where it is rather narrow, forming 

 a conspicuous auricle at the posterior angle. The outer peristome is 

 marked by thin, concentric lamellae. Operculum typically annularid. 



U.S.N.M. No. 355870 is a cotype collected by Gundlach at Guisa, 

 Bayamo, Oriente Province. It has a little over 6 whorls remaining 

 and measures: Length, 14.8 mm.; greater diameter, 8.2 mm.; lesser 

 diameter, 6.2 mm. 



ANNULARIA (TROSCHELVINDEX) ROCAI. new species 



Plate 38, Figure 3 



Shell elongate ovate, of yellowish flesh color, with interrupted spiral 

 bands of brown. Nuclear whorls thin, translucent, only the last one, 

 which is smooth, remaining. Postnuclear whorls marked by numer- 

 ous very narrow, slender, sublamellar axial riblets, of which 47 occur 

 on the first turn and 120 on the last. In addition to tliis, the whorls 

 are marked by spiral threads, of which the first 2 at the summit are 

 much stronger than the rest. Here they cause the axial riblets to 

 become somewhat expanded and reflected upward, while the rest 

 cause the junctions of the two to form not very strong, elongated 

 nodules, the long axis of which corresponds to the axial sculpture. 



