90 VARICELLA, JAMAICA. 



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

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

 aperture 5 mm. ; whorls 6y 2 . 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 6y 2 , the first iy 2 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 6%. 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 3% ribs in a mm. 



Section VARICELLA s. str. 



Embryonic shell obtusely conic or pupiform, of 2% to 3 

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

 whorl ; the subsequent whorls striate between the varices, the 

 &tria3 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 lobe at the lower third ; richly colored forms. 

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

 concave. 



