FISSURELLA.— Plate II. 



Species 14. (Mus. Cuming.) 



FissuRELLA cosTATA. Fiss. testd suborbiculari-ovatd, 

 antice attenuata, radiatim rugoso-lirata, liris obtuse 

 nodosis, orijieio parviuseulo, oblongo, lateribus medio 

 paululum excavatk ; Jlavido-cinerascente,fusco-olwaceo 

 radiata. 



The kibbed Fissurella. Shell somewhat orbicularly 

 ovate, attenuated anteriorly, radiately roughly ridged, 

 ridges obtusely nodose, orifice rather small, oblong. 



sides a little excavated in the middle ; yellowish-ash, 



rayed with brownish-olive. 

 Lesson, Voy. de la Coquille, p. 410 ; Illus. Zool. pi. 12. 



Ihmrella Cldlemis, Sowerby. 



An eadem ? Fissurella rudis, Deshayes. 

 Hab. Valpai'aiso (in exposed situations on the rocks at low 



water); Cuming. 

 The orifice inclines somewhat anteriorly in this species. 

 It is vei-y abundant on the coast of Chdi. 



