90 VARICELLA, JAMAICA. 



There are 5 ribs to a man. on the face of the last whorl. 

 The figured shell measures, length 12, diam. 3.7, length of 

 aperture 5 mm. ; whorls 6y>. No locality is given. 



Another specimen is in the Adams collection from Pedro, 

 St. Anns, J. S. Hyde. It has only three plaits in a. mm. on 

 the last whorl and measures, length 11.5, diam. 3.8, aperture 

 5 mm. ; whorls 6^2, the first I 1 /? smooth. See pi. 9, fig. 43. 



Most of the series before me agree with typical vicina or 

 are intermediate between that, and the coarsely sculptured 

 form. Figs. 45, 46 is a typical specimen, length 11.7, diam. 

 3.4, aperture 5 mm., whorls 6i/>. There are nearly 5 ribs in 

 a mm. Figs. 41, 42 are a larger shell, 14 x 4.1 mm., aperture 

 6.1 mm., whorls 7, with 3y 2 ribs in a mm. 



Section VARICELLA s. str. 



Embryonic shell obtusely conic or pupiform, of 2y> to 3 

 whorls, all smooth, or rarely with fine striae on the last half 

 whorl ; the subsequent whorls striate between the varices, the 

 strige wider than the intervening grooves, or with widely 

 spaced grooves; never spirally striate. Columella straight or 

 concave. Type V. leucozonias. 



Distribution, Jamaica, middle and eastern Cuba, Haiti 

 and Porto Rico. 



This group is more widely distributed than any other ex- 

 cept Pichardiella. In having the embryonic whorls smooth 

 it is less specialized than most other phyla of the genus, but 

 in a few Jamaican species, the last embryonic whorl or half 

 whorl has 'been invaded by fine striation of the neanic type. 

 Forms widely different in size, shape and sculpture are in- 

 cluded in the group, yet there are transitional species which 

 seem to make its division on conchological grounds imprac- 

 ticable. What the soft anatomy will show is -still unknown. 



A. Jamaican Species. 



I. Outer lip strongly sinuous, projecting forward in a 

 rounded lo'be at the lower third; richly colored forms. 

 a. Large, 35 to over 40 mm. long; columella strongly 

 concave. 



