OETTSTACEA. 
63 
XA'jfTiio TTJBEBCTJLATA — Tt. Q. Coucli, BilV s Brit. StdTk-eyed 
Crust., appendix p. 359. 
This specios, which was iitst describod by Mr. Bell in his booh, 
On the British Crustacea, was added to our Fauna by tholato Miv 
Q. Couch, of Penzance, son of the author of the first edition of 
this report. 
Mr. Couch says that it appears to prefer deeper water than the 
other two species, as he found it repeatedly in crevices of EseJiara 
foliacea in the deep water off the Bunnell Stone, in Mount’s Bay. 
In the summer it approaches the shore and is found under 
stones. It spawns in June. Mr. Bell adds “the name tuierculata 
^as been given to the species by its discoverer, from whom and 
from, his father, Mr. Jonathan Couch of Polporro, I have had so 
niany claims upon my acknowledgments for their intelligent 
^nd ready assistance in the progress of the present work.” 
Geijus, Caecee. — Lin., Leach, Bell. 
,, Platycarcinus. — Edwards, Couch. 
Carapace approaching to a transverse oval without furrows. 
Cancee pAGxrETrs. — ^Edible Crab. — Linn., Leach, and Bell Brit. 
Stalk-Eyed Crust., p. 59. 
I'latycareinus pagurus. — Edwards, Mist, des Crust., t. p. 413; 
Couch, Cornish Eawia, p. 68, 1838. 
This is the species so highly esteemed for the table, and for 
■ ^hioh a regular fishery is carried on. The male, called the Stool 
'’^ab, is much the larger, not uncommonly weighing a dozen 
Pounds, whilst the female, termed the Bon crab, is rarely half 
*^at size. Although this crab is somewhat affected by cold 
leather, so that it is most abundantly caught in summer, its 
^•otivity is not diminished by it, and some may be obtained at all 
®oasons. The fishery, therefore, is more influenced by the danger 
Which the pots set to take them are exposed in stormy weather, 
fian by the absolute scarcity of the crabs. The haunts are along 
file edges of the rocks, in situations varying from low water mark 
^0 about 20 fathoms, and the selection is perhaps as much influ- 
®i>oed by the facility of hiding or burrowing, as by the supxdy 
food. The Bon crab begins to breed when about three inches 
^^J'oss the carapace ; and the spawn after remaining long attach- 
^•1 to the parent, is buried beneath some shelter at aU seasons of 
year; but when engaged in this duty the female feeds 
