32 Mr. S. P. Woodward on the Animals of 



our view of the nature of the " gonidium " so called therein, and 

 iLake it an infusorium instead of a zoospore, of which much 

 more might be said in support if this were the place for it; 

 and although (me of the facts brought forward in proof of the 

 independent movement of the mucus, was the polymorphism 

 and locomotion of the gonidial cells which it was supposed to 

 have composed, there are sufficient reasons left for my still re- 

 taining the opinion, that its contractility is not the effect of any 

 chemical process of nutrition that is going on in the cell, though 

 it may not be uninfluential as a physical agent in this process. 



II. — Descriptions of the Animals of certain Genera of Conchifera. 

 By S. P. Woodward, Esq., F.G.S. 



My dear Sir, 



I herewith send you some more figures of the animals of cer- 

 tain genera of Bivalve shells (Conchifera), which Mr. Woodward 

 has made for me, and the notes he has appended to them. 



These animals have been shortly noticed by me in my paper 

 on the Arrangement of Bivalves in the 'Annals,' vol. xiv. p. 21. 

 I am, my dear Sir, yours truly, 



J. E. Gray. 

 Dr. Francis. 



Solen {Cultellus?) Javanicus. Singapore. 



Mantle-lobes united, covered with wrinkled epidermis ; siphons 

 very short, fringed ; no ventral orifice ; pedal opening terminal. 

 Foot straight, compressed, truncated, attached by small suspen- 



a, a', adductor muscles j I, liver ; h, heart ; p, palpi. 



sors — two beneath the hinge, and two in front of posterior ad- 

 ductor. Palpi very large, oblong, pointed, attached lengthwise. 

 Gills long, narrow, equal, plaited transversely. A long curved 

 portion of the intestine lies close to the left side, bordering the 

 palpi. 



[This is a species of the genus Pharus. — J, E. G.] 



