CYPRINID.E. OXHORN-COCKLE. 39 



the pot closely covered for three-quarters of an 

 hour. Drain off all the liquor that will flow freely, 

 and, when you have turned the chowder into the 

 tureen, return the gravy to the pot. Thicken with 

 flour, or, better still, pounded crackers ; add a glass 

 of wine, some catsup and spiced sauce ; boil up, and 

 pour over the contents of the tureen. Send around 

 walnut or butternut pickles.* 



At Hong Kong there is a large consumption of 

 Cytherea petecliialis ; and Cytherea arabica is said by 

 Dr. Leon Vaillant to be eaten by the Arabs, and it is 

 found in the Bay of Suez.f 



FAM. CYPRINHXaS. 

 ISOCARDIA.OXH.OKN- COCKLE. 



ISOCARDIA COR, LinnaBus. Heart-Shell or Oxhorn- 

 Cockle. Shell very strong, nearly spherical, heart- 

 shaped, concentrically striated, equivalve, smooth, with 

 a dark reddish-brown epidermis ; beaks very promi- 

 nent and curled ; two primary teeth in the right valve, 

 lying parallel to each other; in the left valve the 

 outer tooth is indented and is large, the other, thin 

 and laminar. The lateral tooth strong and elongated, 

 situated under the ligament, which is external. 



This magnificent mollusk is very partially distri- 

 buted, though plentiful in some places. Specimens 

 have been sent to me from Dublin Bay, where, I grieve 



* ' Common Sense in the Household/ by Marion Harland. 

 t * Recherches sur la Faune Malacologique de la baie de Suez.' 

 ' Journal de Coach.' tome xiii. 1865. 



