INTRODUCTION. 15 



longer than wide ; outer jaw-feet narrow, third joint oval, 

 fourth longish. Fore feet shorter, but much stouter than 

 the others ; the hand swollen, and the fingers slightly bent. 

 Abdomen in both sexes of six joints. 



Stenorhynchus Rostratus,* L. sp. Slender-legged 

 Crab. — Beak not reaching the end of the peduncle of the 

 outer antenna? ; epistome on each side with a little spine 

 placed near the auditory organ ; carapace above with va- 

 rious spines. 



Appears to be common on the coasts of Great Britain 

 and Ireland, from Orkney to Cornwall. The Rev. G. Gor- 

 don finds it in the Moray Firth (Zoologist, 36S1), and Dr. 

 How den in the Firth of Forth, in sandy or muddy bottoms 

 (Proc. Royal Phys. Soc. Edin. Jan. 1853). At Weymouth 

 it spawns between May and August. 



Stenorhynchus tenutrostris, Leach, sp. (PI. I. fig. 1.) 

 Slender-beaked Spider Crab. — Beak extending beyond the 

 end of the peduncle of the outer antennas ; arms more slen- 

 der than in the last species, and spinulose on the inner 

 margin. 



Not so common as the last ; first found by Dr. Leach 

 among Crustacea collected at Torquay, and found abun- 



* Cancer rostratus, L. ; Cancer PLalangium, Penn. 



