CONCHIFERA. 



478 



Myada. The description of the 

 animal of Fanopcea, at p. 319, was 

 taken fi'om the British species, P. Nor- 

 vegica, which agrees both in the cha- 

 racter of the shell and soft parts with 

 Saxicava, and belongs to the Gastro- 

 clicBnidcE. 



Fig. 272 represents the animal of 

 the typical species of PanopcBa, as seen 

 on the removal of the left valve and 

 thin part of the mantle. It was ob- 

 tained on the coast of Sicily, and pre- 

 sented to the Gloucester Museum by 

 Capt. Guise. 



Mantle and siphons covered with 

 thick, dark, wrinkled epidermis; si- 

 phons united, thick, contractile ; pedal 

 orifice small, in the middle of the ante- 

 rior gape ; foot small (/), body oval 

 (5), with a prominent heel; pallial 

 muscle {m) continuous, with a deep 

 siphonal inflection {s) ; lips broad and 

 plain, palpi triangular, deeply plaited 

 {f) ; gills unequal, (much contracted in 

 spirit), reaching the commencement of 

 the siphons ; inner gills prolonged be- 

 tween the palpi, plaits in pairs, each 

 lamina being composed of vascular 

 loops arranged side by side; margin 

 grooved, dorsal border of inner lamina 

 unattached; outer gills shorter and 

 narrower, formed of a single series of 

 branchial loops placed one behind the 

 other, dorsal border wide and fixed. 



Fig. 272. Fanopcea glycimeris. 



f- The size of the original. 



a, a', adductor muscles ; p, posterior pedal 



muscle; ?-, renal organ. 



Isoleda, Ryck. 1856 = Leda solenoides and Cucullella sp. p. 269. 



Anomianella, iproteus) Ryck. Carb. Tournay = Crania? 



Crenella (decussata) T. Br. 1827. p. 266 = Nuculocardia (divaricata) 

 D'Orb. Cuba. = Myoparo, Lea (p. 269.) Brachydontes, Sw. p. 265, is more 

 elongated ; Lanistes (discors) Sw. nearly wants the crenulations. 



