DONAX.— Plate V. 



Hab. Peru. 



A gibbous shortly truncated shell, rapidly acuminated 

 anteriorly, very finely cancellated throughout. 



Species 31. (Mus. Cuming.) 



DoNAX LAEVIGATA. Bo7i. testd rotwndato-cwMatd , Icevi- 

 gatd, politd, striis obsolete radiatd, lutescente-spacJked, 

 ad marginem ceerulescente j imiionibus candescent ibm, 

 liiteo maculatis; latere antico acuminato-rotundato, 

 postico brevminio, abrupte tnmcato. 



The smooth Donax. Shell rotundately wedge-shaped, 

 smooth, polished, obsoletely rayed with stria; yel- 

 lowish-fawn, bluish at the margin ; umboes bluish, 

 yellow-tipped ; anterior side acuminately rounded, 

 posterior side very short, abruptly truncated. 



Deshaybs, Pro. Zool. Soc. March, 1854. 



Hab. ? 



Distinguished by its polished oblong-rounded form, 

 and very abruptly truncated posterior side. 



Species 32. (Mus. Cuming.) 



Donax sokdida. Bon. testd triyouo-cuneatd, compressd, 

 deiisissinie radiatlm liratd, ad aream posticam decus- 

 satim crispato-serratd, sordide alba, latere antico tri- 

 gono-acuniinato, postico acute angulato, subconcavo- 

 trmicato. 



The dirty Donax. Shell triangularly wedge-shaped, 

 compressed, very closely radiately ridged, on the 

 posterior area decussately crisply serrated, dirty- 

 white, anterior side triangularly acuminated, posterior 

 sharply angled, and subconcavely truncated. 



Hab. ? 



A very characteristic species, singularly resembling in 



its general contour the multivalve shell of the cirrhipede 



Anatifa lavis. 



