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PROCEEDINGS OE THE MALACOLOGICAL SOCmTT. 



slightly ; a well -marked penis is present ; the foot is long and narrow, 

 slightly expanded anteriorly, where it presents a convex border, 

 divided into two by a transverse groove, the latter being continued up 

 the side of the foot almost to the operculum, this groove probably 

 separates the propodium from the mesopodium, posteriorly the foot 

 tapers very slightly, and is finally rounded off; the operculum projects 

 on either side of the foot. 



The radula is long and narrow, and typically rhachiglossate ; it 

 consists of about fifty transverse rows, each of which is composed 

 of three teeth (Fig. III). The median tooth presents a roughly 

 quadrangular base, the . anterior border being concave, and a small 

 backwardly directed conical cusp ; the lateral teeth are large and 



Fig. I. Operculum of Donovania minima. 

 ,, II. Ventral aspect of the animal. 

 ,, III. Transverse row of teeth from the radula. 

 (All considerably magnified.) 



tricuspid, the cusps incurved and increasing in size from within 

 outwards, the base is concave anteriorly, and produced laterally into 

 a handle-like process. 



The character of the radula shows at once that Donovania has no 

 connection with the Pleurotomidse, but that it is typically rhachi- 

 glossate. It, however, differs considerably from the Muricidse in the 

 form of its teeth, approaching more nearly to the Buccinidse, and 

 amongst them perhaps most closely to Pisania. In its central tooth 

 we find a suggestion of Sipho, while its lateral teeth are much more 

 buccinoid, but peculiar in the lateral prolongation of the base. 



Fischer places the genus Pisania in the Buccinidae, and to that 

 family I think we should also refer Ponovania, ranking it next to 

 Pisania, which it approximates somewhat, as already mentioned, both 

 in its radula and operculum. 



