128 ELASMIAS. 



etal fold, and two dentiform columellar folds, placed at the 

 angle of the truncate columella. Columella broad, vertical, 

 hyaline, obliquely and broadly truncate. Bight margin sim- 

 ple, acute. Length 3, diam. 2 to 2*4 mm. (Benson"). 



Mauritius : Moka, on the grounds of Sir D. Barclay, creep- 

 ing in showery weather on the leaves of Niccioli hedges (Ben- 

 son) ; Reduit ravine and Vacoa (Mobius). Bourbon: above 

 Salazie (G. Nevill). 



Tornatellina cernica, BENS., Annals and Magazine of Na- 

 tural History (2), vi, October, 1850, p. 254. PFEIFFER, Mono- 

 graphia, iii, p. 526. KUESTER, Coiichylien Cabinet, Pupa, p. 

 155, pi. 18, figs. 30, 31. VON MARTENS, in Mobius, Beitrage 

 zur Meeresfauna der Insel Mauritius u. der Seychellen, 1880, 

 p. 199. Tornatellina (Septinaria) cernica Bens., G. NEVILL, 

 Journal of the Asiatic Society of Bengal, xxxix, 1870, pt. 2, 

 p. 413. Tornatellina mauritiana PFEIFFER, Proc. Zool. Soc. 

 Lond., 1852, p. 150. Achatina- minutissima Barclay Ms., ac- 

 cording to Pfeiffer. 



This species has a broad columellar plate, which is thin 

 above the lower lamella until the fully adult stage, when the 

 upper fold becomes distinct. The parietal lamella is about 

 the third of a whorl long. No examples w 7 ith palatal plicae 

 have been seen, but the mid-neanic stage is not represented in 

 the series examined. One specimen opened contained two em- 

 bryo shells, one, of nearly two whorls, diameter 0.8 mm., was 

 probably about to be born, and represents the end of the em- 

 bryonic stage (fig. 3). It has a large parietal lamella about 

 half a whorl long, and a wide columellar plate differing very 

 little from the adult stage. A smaller embryo, above the pre- 

 ceding in the parent shell, has about l 1 /^ whorls, with a diam- 

 eter of 0.6 mm. (pi. 31, fig. 2). There is no parietal lamella, 

 and the slightly sinuous columella is thin and simple. It ap- 

 pears that the apertural lamella? are very rapidly developed 

 in the last part of the embryonic stage. 



It remains to call attention to the remarkable similarity of 

 the Hawaiian E. fuscum to this species, almost the only dif- 

 ferences being that fuscum has larger lamella? and is darker in 

 olor. The lamellae of E. ccrnicum are more strongly devel- 



