90 Dr. Philippi on the animal of Pileopsis Garnoti. 



branchiae (in the preserved specimen they still measure 2^^^^, 

 of which the two last are furcately divided^ the front margin 

 has four similar merely somewhat shorter filaments, but be- 

 sides these there are five similar, only somewhat still smaller 

 filaments on the back, between the dorsal tentacula and the 

 anal branchiae, viz. three in the central line and one on each 

 side before the latter. The anal brancJiice amount to nine, 

 are filiform, directed with the exception of the single one ante- 

 riorly and furcate, simple, all ciliated on both sides. The anus 

 is situated in the centre. The dorsal tentacula stand in a line 

 with the first lateral branchiae and are very long ; as it appears 

 they are not retractile. The frondose club is very long in 

 them. The mouth is situated on the front margin close above 

 the foot, and I do not find in them the tentacula labialia 

 mentioned in the preceding species ; the parts however are too 

 much contracted to admit of my denying their presence. The 

 sea^ual orifice is situated on the right side between the first 

 and second lateral branchiae. 



Plate III. Fig. 1. Euplocanms frondosus, after a drawing of M. Scacchi. 

 Fig. 2. Eitplocamus cirriger, after a drawing of M. Scacchi. 



2. On the animal of Pileopsis Garnoti, Payr. ; Patella Garnoti, 

 Phil. Enum, Moll. Sicilice. Plate III. fig. 3. 



That Pileopsis Garnoti, Payr., is not placed in its correct 

 genus, w^as evident to me when occupied with my ^ Enume- 

 ratio,' but I was not more fortunate than Payrandeau, in re- 

 ferring it to Patella > The impression of the muscle compared 

 with the whorl ought to have taught me that the vertex stands 

 posteriorly and not in front as in Patella ; however I may 

 mention in excuse that the correct recognition of the impres- 

 sion of the muscle is very difficult with the strong lustre of 

 the inner side. I lately had an opportunity of finding the 

 living animals on a mass of Cladocora calycularis, Ehrenb. 

 (Caryophyllia calycularis, Lamk.). It differs essentially from 

 Patella. Instead of the round head with the two filiform ten- 

 tacula, the head is flat, foliaceously expanded in front, deeply 

 excavated in the centre where the mouth lies, and no tentacula 

 exist ; perhaps, however, it may also be said that the dorsal 

 tentacula cohere with the ventral into a broad mass, for the 



