VARICELLA, JAMAICA. 97 



2, p. 25. Achatina unicolor C. B. A., t. c. p. 26. Achatina 

 gayana C. B. A., t. c. no. 7, p. 103 (April, 1850). 



After a careful study of Adams' types of the above species, 

 I do not hesitate to rank them as varieties of a single species. 

 They differ only in slight details of color and striation. 



The two specimens of V. angiostoma in the Adams collec- 

 tion -are both broken. The best one, which I have drawn 

 (fig. 7), measures 17.7x6 mm. in its broken condition, with 

 61/2 whorls. Though not exactly agreeing with Adams' 

 measurements, I think this is probably the type: It is pale 

 rose colored, with three chestnut streaks on the last, four on 

 the two preceding whorls. There are two smooth apical 

 whorls. There are 6 or 7 flattened striae in a mm. on the last 

 whorl, separated by narrower linear grooves. 



41a. Var. itigallsiana (C. B. Adams). PI. 16, figs. 1, 2. 



' ' Shell fusiform ; pale brownish, with but four or five dark 

 brown transverse stripes; with very minute rather numer- 

 ous but not crowded transverse striae; spire with moderately 

 convex outlines ; apex rather small ; whorls seven, moderately 

 convex, with a well impressed finely corded suture; aperture 

 very long, rather narrow; lip thin, with the edge sharp and 

 curved forwards; columella moderately produced and arcu- 

 ate. Mean divergence 36 ; length .75 inch; breadth .25 inch; 

 length of aperture .35 inch." (Adams}. 



The single example in coll. Adams is figured. It is a thin, 

 delicate shell, rose-tinted, with inconspicuous pale ochre- 

 chestnut varix-streaks, 5 on the last, 4 on the preceding, 3 

 on the next earlier whorl. It is finely plicatulate, very regu- 

 larly so on the spire and upper part of the last whorl, where 

 there are about 5 striae in a mm. ; but some of the striae drop 

 out, failing to reach the periphery, and the base is smooth 

 around the columellar region. The first 2% whorls are 

 smooth. The outer lip is retracted above, evenly arcuate ex- 

 cept for a minute point projecting at the lower third. The 

 columella is vertical, nearly straight, obliquely truncate at 

 base. 



The following form is probably a mere variation of in- 

 gallsiana, not a true race or subspecies. 



