254 ODONTOCYCLAS. 



at the peripheral interruption and in the suture, as noticed 

 by Ancey, but they are very easily removed by washing or 

 handling after becoming dry. The angular lamella is enlarged 

 before passing into the outer lip, and often bears a little 

 point projecting into the sinulus. The parietal lamella 

 emerges nearly to the edge of the parietal film; both are 

 straight within. Columellar lamella enters horizontally, but 

 its edge is a little bent downward. The supracolumellar and 

 infracolumellar converge inwards towards the columellar. A 

 suprapalatal denticle defines the sinulus, the short upper 

 palatal plica being near it. The lower palatal is at least 

 double the length of the upper, nearly straight. Basal plica 

 smaller but long. The lamellae and plicae project as little 

 points on the slightly expanded peristome. All of them show 

 outside through the shell, and the palatal plicae form little 

 external ridges. Specimens from Grahamstown measure : 



Length 3, diam. 1.4 mm. ; 7% whorls. 



Length 2.9, diam. 1.45 mm. 



Mr. Burnup, who has given a good account of this species, 

 with excellent figures, found the length to vary from 2.74 to 

 3.59 mm. He notes that the two specimens found in Natal 

 are remarkably high and narrow, one from Hilton Eoad meas- 

 uring 3.53 mm. high, 1.62 mm. wide. 



The extremes of size in another lot from Grahamstown, 

 kindly sent by Mr. J. Farquhar, are : 



Length 3.45, diam. 1.65 mm. ; 8 whorls. 



Length 2.75, diam. 1.3 mm. ; 7% whorls. 



The larger shells are a little more swollen in the middle than 

 the smaller, which are more cylindric, like fig. 7. Most of 

 them retain hairs along the suture. 



Genus ODONTOCYCLAS Schlueter. 



Odontocyclas SCHLUETER, Kurzgefasstes Syst. Verzeich. 

 meiner Conchyliensammlung, 1838, p. 10, for kokeiln. Scope- 

 lophtia Albers, Die Heliceen, 1850, p. 206 ; Edit. 1860, p. 296, 

 type Pupa kokeiUi. 



The shell is conic with very convex base, of 7-8 convex 

 whorls, the last built forward to the ventral convexity and 



