MOLLUSC A TESTACEA 439 



tuted in the Annals (xi, p. 257), Plus mryatus and recetosus, from Ceylon, 

 i!i-(i<>t!ltttiis, from Panama, roseatus, from Sumatra, and gaudens, from the west 

 coast of Mexico, arc figured in Hiiids (Sulphur). 



BRACHIOPODA. 



Orthis anomioides, Scacchi et Philippi (Enuin.) : small,, transversely oval, 

 low, flat beneath, the internal skeleton consists of a triangular plate, and 

 presents an iucrassated apex. 



TESTACEA. 



A Memoir by Duvernoy, on the nervous system of the 

 Conchifera Du Systeme nerveux des Mollusques ace- 

 phales bivalves on lamellibranches, is noticed in the Comptes 

 rendus (xix, p. 1132.) 



Will has instituted researches on the eyes of the Con- 

 chifera. He found them to be very highly organized. 

 Besides Pecten, Spondylus, and Ostrea, he found them also 

 in Pinna, Area, Pectunculus, Mytilus, Cardium, Tellina, 

 Mactra, Venus, Solen, Pholas, sometimes in vast numbers. 

 The existence of eyes has also been proved, in the Ascidians, 

 Cynthia, Phalhisia, and ClaveUina, and to the number of 

 fourteen, eight of which appertain to the respiratory and 

 six to the anal siphon. (Frorieps u. Notiz. xxix, pp. 81 

 and 99.) 



Van Beueden has instituted new researches on the sexual 

 relations of Anodonta. He found the organ in the foot of 

 the animal, the ovary, constituted of small csecal 

 pouches, some of which contained ova, others spermatozoa; 

 the organ consequently was at the same time ovary and 

 testis. The organ which Bojauus had explained as lungs, 

 and Neuwyler as testes, is regarded by the author as a 

 pericardium, and the floating bodies contained in it, as 

 analogous to the spongy bodies in the venous cavities of the 

 Cephalopoda. (Bulletin cle r Academic de Bruxelles, xi, 2, 

 p. 377.) 



With respect to the copulation of Tellina planata, Will 



