46 VARICELLA. 



Sub genus BIANGULAXIS nov. 



The shell is oblong-turrite, smooth and glossy, pale, com- 

 posed of 8 whorls, the upper ones plicate at the suture. Aper- 

 ture narrowly semioval; eolumella somewhat truncate at 

 base, with an oblique fold above. Type 8. moreletiana Pf r. 



The single species is apparently still known by one speci- 

 men only. It was described as a Spiraxis, and subsequently 

 referred to Streptostyla by Pfeiffer, followed by Tryon and 

 Cro-sse, but it seems, so far as one can judge by the descrip- 

 tion and figure, to stand nearer the present group. The 

 structure of the icolumella is not very unlike that of 8. 

 inusitatus. Were it not from an inland locality, I would 

 be disposed to think it an Auriculastrum. Pfeiffer alludes 

 to its Ferussaeia-like aspect. 



48. S. MORELETIANUS Pfr. Vol. I, p. 49. Banao, Cuba. 



Genus VARICELLA Pfeiffer, 1855. 



Varicella PFR., Malak. Bl. ii, 1855, p. 172, for Achatina 

 leucozonias, dominicensis, procera, griffithsi, ligata, jamai- 

 censis, philippiana, venusta, nemorensis, similis, costulosa and 

 nitida. ALBERS-MARTENS, Die Heliceen, 1860, p. 30, type 

 leucozonias -Melia Albers, Die Heliceen, 1850, p. 195, for 

 phillipsii, griffithsi and venusta. Not Melia Billb. 1820 

 (Crustacea) or of Desv. 1830 (Diptera). Achatina, Glan- 

 dina and Oleacina of some authors. 



Oleacinidae with the post-nepionic whorls of the oblong or 

 turrite shell sculptured with occasional varices or varix-lines, 

 more or less conspicuously differentiated from the other sculp- 

 ture, and often preceded by dark streaks. Embryonic shell 

 of 2 to 3% whorls, smooth or ribbed. Aperture less than half 

 the total length, the outer lip narrowly expanded or simple, 

 columella more or less strongly truncate at the base. 



Type V. leucozonias. Distribution, Antilles, except per- 

 haps some of the Caribbean islands ; southern Florida. 



Very little is known of the soft anatomy of this genus. 

 Binney has figured the teeth of V. semitarum and V. phillipsi. 

 The former has 30,1,30 teeth, with a very well developed cen- 



