Cirrhipeda, Conchiferu^ and Mollusca, 337 



approximdtis, incurvatis, marrjine crenulato ; long, 1 ; lat. If ; 



poll. 



Habitat ad Rio de Janeiro. Mus. Brit., nost., Brod. 



14. NUCULA STRIATA. 



JV. testa striata, suhtumidd, crassd, sub-trigond, albd; latere antico 



productiori, sub-roslrato ; long. -jV ; lat. f ; poll. 



Habitat in mari alto circa oras Patagonicas. Mxis. nost. 



Taken by a dredge in 40 fathoms water, 20 miles from the coast of 

 South America, in the neighbourhood of Port St. Elena. 



] 5. MODIOLA SINUOSA. 



M. testd ventricosd. subovatd, longitudinaliter striata; intus irides- 

 cente, margine sinuoso, epidermide fused ; long. -J-^ ; lat. \^ fere; 

 poll. 

 Habitat ad littora Brasilise (Santos.) Mus. nost. 



16. Pecten Patagonicus. 



P. testd sub-cequivalvi, hrunned, longitudinaliter creberrime elevato- 

 radiatd ; intus albidd, longitudinaliter sub-radiatd ; long. 2a ; 

 lat. 2| ; poll. 

 Obs. auribus inaequalibus. 

 Habitat in freto Magellanico passim. Mus. nost. 



17. Pecten vitreus. 



P. testd sub(Bquivalvi, translucente, longitudinaliter multi-sulcatd ; 



sulcis convexis flavidulis, valvd inferiore pallidiori ; long, ^r'o] ^Q^* 



H ; poll. 



Obs. Auribus inaequalibus. 



Habitat in freto Magellanico (passim.) Mus. nost. 



This shell is found attached to the leaves of the Fricus giganteus, and, 

 with other Mollusca, is the food of the Steamer or Race-horse Duck 

 (Micropterus brachyptera and M. Patagonica.) 



18. Terebratula flexuosa. 

 T. testd rotundato-cordatd, gibbd, sub-fused, longitudinaliter creberrime 



