VARICELLA. 63 



d. 8.75 x 1.5 mm., 9 flattened whorls. 



V. osculans, no. 15. 



d 1 . 9.9 x 2 mm., Sy 2 moderately convex 

 whorls. V. mandevillensis, no. 16. 

 ft 1 . Last whorl with stout ribs, intervals with about 

 22 fine stria 11.7 x 2.9 mm., whorls 9. 



V. c. multistriata, no. 13e. 



& 2 . Usually with 20 to 30 delicate riblets on last 

 whorl, intervals with 8 to 13 striae. 



V. costulata, no. 13. 



9. V. ADAMSIANA ( Chltty ) . PL 12, figs. 4, 5. 



' * Shell conic, very slender ; ground color very light brown, 

 with rich dark umber transverse bands, light on the right 

 and becoming dark gradually on the left side. There are 

 three of the these bands, with the intervening light brown 

 on the last whorl. Upon the last 7 whorls these are very 

 strong rounded waving ribs, 20 on the last whorl, and de- 

 creasing in number upwards; these are decussated by nu- 

 merous spiral ridges. Beneath the ribs are very numerous 

 microscopic strise. The ribs of each whorl project over the 

 preceding one, causing the shell to be coronated. Above these 

 7 whorls, up to the apex the whorls are closely striated, 

 with much arcuated striae. Spiral outlines slightly convex. 

 Whorls 101/2, well convex, with a well impressed suture. 

 Aperture short, the upper part projecting angularly from the 

 whorl above: well rounded below, till it meets the columella 

 almost at right angles. Labrum sharp, constricted inwards 

 about one-third down. Columella rather straight, slender 

 and pointed. Divergence about 15, length .8, breadth .14 

 [20 x 3.5 mm.]. (Chitty). 



Jamaica: Swift River, St. George's (Chatty) ; Port Antonio 

 (Henderson) ; Richmond Vale (Mrs. E. M. Swainson). 



Achatina adamsiana CHITTY, Contrib. to Conch, p. 14 

 (Oct. 1853). PFR., Monogr. iv, 610. 



This is the largest species of its group. There are 3 em- 

 bryonic whorls, the first smooth, the next two closely rib- 

 s'triate, the riblets a little oblique, narrower than their inter- 



