VARICELLA, JAMAICA. 107 



slightly oblique. Outer lip moderately arched forward, basal 

 lip receding. The eolumella is extremely concave, short, 

 and vertically truncate at the base. The internal axis is 

 strongly sinuous (fig. 14) ; viewed from the base it is seen 

 to gyrate around a small central hole. Length 17.5, diam. 4, 

 aperture 4.9 mm., whorls 8%. 



Jamaica, Types no 59108 A. N. S. P., from R. Swift. 



This form differs from V. similis by its very concave colu- 

 mella and gyrate axis. It is also less strongly sculptured 

 than similis. It may be identical with Achatina arcuata 

 Pfr. of Reeve, Conchologia Iconica v, pi. 17, f. 83, but 

 that does not seem to be the A. arcuata of Pfeiffer. It .is 

 paler and smoother than V. similis longa, which moreover 

 has not the strongly spiral columellar axis of this shell. 



49a. Var. mandevillensis Pils., n. v. PI. 17, fig. 19. 



Pale olivaceous-yellow, with a few narrow 'chestnut varix- 

 streaks. Later whorls without grooves, being weakly marked 

 with growth-wrinkles only. Decidedly wider than V. simi- 

 lans. Length 17, diam. 4.7, aperture 5.5 mm., whorls 8%. 

 Mandeville. Type in coll. J. B. Henderson. 



A smaller example in coll. A. N. S. measures 16.5 x 4.3, 

 aperture 5 mm. 



50. V. LONGISPIRA (C. B. Adams). 



"Shell much elongated, conoidal; pale brown, shining, with 

 very lightly impressed not very numerous transverse striae: 

 apex obtuse: outlines of the spire slightly curvilinear: 

 whorls ten, moderately convex, with a well impressed suture : 

 aperture subrhomboidal, subacute above : labrum thin, slightly 

 advanced in the upper half, retreating below : eolumella very 

 oblique, distinctly truncated. Mean divergence about 12 ; 

 length of spire .33 inch; total length, .45 inch; breadth .09 

 inch." (Adams). 



Jamaica. 



Achatina longispira C. B. A., Contrib. to Conch, no. 7, 

 p. 104 (April, 1850) ; p. 183, no. 218. PFR., Monogr. iii, 

 503. 



