380 



SHELLS AND SHELL-FISH. 



Hyria L>am. Hinge margin straight ; both extre- 

 mities elevated and winged ; cardinal teeth very- 

 long, and resembling lateral teeth. {Jig. 124.) 

 syrmatophora Gmelin, 3222. corrugata. En. Meth. pi. 247. 

 elongata Sw. Ex. Conch. f. 2. 



pi. 24. 



Hyridella Sw. Transversely oval ; bosses not sulcated; 

 posterior margin elevated and winged ; one cardinal 

 and one lateral tooth in each valve. 



H. australis. Lam. Sys. vi. 1. p. 80. 



SuB-FAM. 3. IRIDININiE. 



Narrow and greatly elongated ; hinge margin without 

 teeth, but sometimes granulated, (fig. 123. e, f.) 



Iridina Lam. Hinge margin granulated. 

 I. striata Sw. Monog. En. ovata Sw. Monog. 



Meth. 204. bisl.* elongata 5*0?^. (private plate). 



Calliscapha Sw, Hinge margin smooth. 



C. Nilotica Soic. Zool. Journ. i. pi. 2. 



Mycetopus D'Orb, Pod-shaped; hinge margin straight, 

 smooth ; the extremities obtusely rounded, or sub- 

 truncated ; considerably gaping ; animal perforating 



(?) 



Solenoides. Sow. Man. f. 151, 



* The fijjure represents this as an " arcuate" she!', very diflPerent from 

 that figured by the late Mr. Sowerby. 



