SUBULINA, COMORO IS. 97 



(Morelet). Fig. 28 is a copy of Morelet's; 30 and 31 are 

 drawn from a specimen. 



37. S. SIMPLEX (Morelet). PI. 13, figs. 29, 34. 



' * Shell imperf orate, subulate, thin, very smooth, pale horn- 

 colored, shining, transparent. Whorls 9, planulate, joined 

 by a subnaarginate suture, the last hardly exceeding one- 

 third the entire length of the shell. Aperture small, piri- 

 form, external margin acute, unexpanded, columella arcuate, 

 obliquely truncate. Length 10, diam. 3 mm." (Morelet.) 



Comoro Islands: Mayotte I. (Marie). 



Stenogyra simplex MORELET, Journ. de Conch, xxx, p. 188 > 

 pi. 10, fig. 9 (above figure 14) ; July, 1882. 



The features which characterize this shell in a genus where 

 similar forms are so numerous, are in the first place, the pol- 

 ish of its surface, the brevity of its columella, and the slight 

 relief of the whorls of the spire. It has 9 whorls, at first a 

 little convex, then more and more flattened as they approach 

 the aperture. The aperture is small, almost exactly pear- 

 ehaped, with the columellar border short, strongly arcuate, 

 and truncated near the base. The shell is transparent, of a 

 pale horn color, smooth, polished, without a trace of striae, to 

 the naked eye; and hardly distinguished with the aid of a 

 hand lens." (Morelet). The short, very concave columella 

 is well shown in fig. 34, representing a shell received from 

 Marie. 



38. S. GLABELLA (Morelet). PL 13, fig. 21. 



1 ' Shell imperf orate, pyramidal, thin, diaphanous, shining, 

 smooth, pale yellow. Spire subulate, apex rather acute. 

 Whorls 8, a little convex, slowly increasing, the last obtusely 

 angular at the base, equal to one-third of the length of the 

 shell. Suture narrowly margined, a dark line accompanying 

 it. Aperture oblong, margin thin, unexpanded, columella 

 shortly arcuate, obliquely truncate. Length 13, diam. 5 mm. ' > 

 (Morelet.) 



Comoro Islands : Mayotte (Marie) . 



Stenogyra glabella MORELET Journ. de Conch, xxxi, p. 195> 

 pi. 8, f. 11. July, 1883. 



