CRUSTACEA. 467 



PiNNOTHEEES Yeteeum — Pinna Pea Crab. — Bell. Ancient Pea 

 Crab. — Couch, Bosc, Leach Malac. t. 15; Milne Edwards, 

 EJkt. des Crust., t. ii, p 32, pll2 ; Bell,BriU Stalk-Eyed Crust., 

 p 72. 



'^ This is more rare than tbe last named, but tbere is a speci- 

 men in the Museum of the Athenseum, at Plymouth, as also of P. 

 Varius of Leach, and either marked by that gentleman or Mr. 

 Prideaux, but which is supposed by Dr. M, Edwards to be iden- 

 tical with P. Pisum, a species that is subject to variation at 

 different stages of growth." 



According to Bell it has been found in Pinna ingens both on 

 our Coast and in the Mediterranean : it has also been taken in 

 Modiola and in the common oyster. 



Bell considers that P. Montagui of Leach is a variety only of 

 this species. 



G ONOPLA C/i)^.— ( Angulae Ceabs. ) 



G-enus, GrONOPLAx. — Leach. 



'' Foot-stalk of the eyes long, received into a cavity occupying 

 the chief part of the anterior border of the carapace. Carapace 

 angular and extended laterally." 



GoNOPi/Ax ANGULATA — Square Crab. — Milne Edwards JList. des 

 Crust., t. ii,p. 61 ; Pennant pi. 5, Jig. 10 ; BelVsBrit. Stalk-eyed 

 Crust., p 130, 



Gr. bispinora. — Brit. Malac, t. xiii. 



' ' Common, in moderately deep water, and often in the stomach 

 of fishes." 



It is rare in Ireland where it has been taken mostly on the 

 south coast. It has not been recorded from Scotland. 



It is a Mediterranean species, and has been recorded from the 

 southern and north-western coasts of France. 



Mr Couch next describes^a very doubtfixL species under the 

 name of Gelasimus Bellii, which Mr. Bell thinks may be the young 

 of Pous's Gonoplax rhomloides, which most carcinologists consider 

 as a variety of Gonoplax angulata. I copy Mr. Couch's descrip- 

 tion in full, so that observers may be able to verify his obser- 

 vations. 



