196 UROCOPTIS, S. G. GONGYLOSTOMA. 



tion) ; Proc. A. N. S. Phila. 1875, p. 222, f. 64 (dentition). 

 CROSSE & FISCHER, Journ de Conch., 1870, pp. 9, 12 (jaw and 

 teeth). ARANGO, Contrib., p. 111. SOWB., C. Icon., xx, pi. 

 14, f. 122. 



Intermediate between U. humboldtiana and U. striatella in 

 shape, but constantly sinistral. The axis is like that of U. 

 striatella. It was this form which Pfeiffer at one time re- 

 ported from Jamaica (see C. B. Adams, Contrib. to Conch, 

 no. 3, p. 39), and figured as a variety of U. humboldtiana. 

 He found a fragment on the beach at Matanzas, doubtless 

 washed down from inland, the locality of the species being 

 from south of the fine mountain Pan de Matanzas. 



65. U. SHUTTLEWORTHIANA (Poey). PL 47, figs. 89, 90 (x 6) ; 



pi. 46, figs. 75, 76. 



Shell cylindric, slowly tapering to a wide truncation above, 

 rather thin, dull or violaceous brown. Surface nearly lustre- 

 less, sculptured with narrow whitish and but slightly arcuate 

 riblets, the intervals wide, about 4 times the width of the rib- 

 lets. Whorls slightly convex, the last very shortly free in 

 front, having a cord-like keel below. Aperture subcircular, 

 colored within like the outside ; peristome thin, expanded and 

 subreflexed. Axis encircled by three lamellfe, the lower one 

 widest, crenate above the middle, extending to the last whorl, 

 the others becoming obsolete in the penult, whorl; the upper 

 lamella is merely a low rounded cord and about two whorls 

 long. In the third whorl from below there is a low cord below 

 the wide lower lamella. 



Length 27, diam. 6 mm. ; whorls 10%. 



Length 22, diam. 5.5 mm. ; whorls 8%. 



Western Cuba: Near Managua, on the plantation "Almi- 

 rante" (Poey) ; town of Santo Cristo de la Salud, in the 

 jurisdiction of Bejucal, prov. Habana (Arango). 



Cyl. shuttleworthiana POEY, Memorias, ii, p. 31, pi. 1, f. 23, 

 axis (1857). PFB., Conchyl. Cab., p. 18, pi. 2, f. 28, 29; pi. 8, 

 f . 22 ; Monogr., iv, 698. ARANGO, Contrib., p. 109. SOWERBY, 

 C. Icon., xx, pi. 3, f. 23. 



Poey justly remarks that C. oviedoiana (= U. h. peraffinis) 



