424 



PHYSETERID^. 



Weston-super-Mare, as supplied to Dr. Gray by Mr. 

 Crotch : — 



A detailed description of the anatomy of this species, 

 accompanied by excellent plates, is given by Prof. VroHk 

 in the " Natuur-kundige Verhandelingen " of Haarlem, 

 for 1848. 



