16 F. Stoliczka — Land-shells of Penang Island. [No. 1, 



the terminal point, contracted in the middle, but it has no distinct denticles 

 at the sides. The laterals gradually become more and more turned, and 

 curved, with a small inner and scarcely a trace of an outer denticle ; up to 

 the 20th they very gradually diminish in size, then a very slight break fol- 

 lows, the 21st being somewhat sensibly smaller and first distinctly bicuspid 

 at the tip, while at the same time the size of the basal plate has much dimin- 

 ished, until in the last teeth it almost entirely becomes obsolete ; the two 

 terminal cusps on the other hand become gradually more and more equal. 



The genital organs have a distinct amatorial gland, possessing near its 

 origin a large globose appendage, internally composed of an elliptical largely 

 cellular mass, in which the cells are concentrically arranged with their longer 

 diameter perpendicular to the walls of the ellipse. The posterior part of 

 the gland is filled with a finely granular substance, — probably calcareous 

 particles. The vas deferens has only one slight enlargement about the mid- 

 dle of its length ; it consisted in a simple thickening of the walls, but I 

 could not trace any calcareous particles in it. Towards the end, where the 

 penis is lodged, the tube is widest and somewhat curved, but there are no 

 other appendages, or calcareous sacs accompanied with a flagellum, present, 

 such as have been observed in many other species of Botula. 



SiTALA* CAEINIFEEA, n. Sp. PL i, fig. 8. 



Testa globose conoidea, cornea, apice obtusula, angustissime perforata ; 

 anfractibus quinque, gradatim accrescentibus, convexe angulatis, sutura sim- 

 plici junctis, transversim minutissime striolatis, superis infra medium carinis 

 filiformibus duobus ornatis, ultimo ad peripheriam tricarinato, basi planate 

 convexiusculo, Isevigato ; apertura semilunari, vertical!, non descendente, 

 labro extus tenuissimo, in regione columellari paululum reflexiusculo. 



Diam. maj. 2'2, minor 2', alt. testae 2" m. m. 



Hah. — ' Penang hill,' in foliis Coffece arabiccB., specimen unicum. 



The animal of this species is exactly like that of >S'. infula, figured in pi. 

 xviii, in J. A. S. B., Vol. xl, PL ii, for 1871 ; it has a generally pale brownish 

 grey colour ; but having obtained a single specimen, I did not like to sacri- 

 fice the shell, in order to notice the internal structure ; for when examin- 

 ing these little species one is by no means sure, that he will obtain from a 

 single specimen an insight into the whole anatomy. 



The present species is closely allied to the Nilgheri Helix tricarinata. 

 Blf., which is also a Sitala, and differs by a more depressed and broadly coni- 

 cal shape, and by having a much wider umbilicus. 



* H. Adams proposed this name for Helix infula^ Bens., as type (P. Z. S. for 

 1865, p 408). I had unfortunately overlooked this reference, when I proposed for 

 Benson's attegia (and infula and a few others) the name Conulema, which must now 

 be regarded as identical with sitala (J. A. S. B., xl, pt. II, p. 236.) 



