58 



A CORNISH FAUNA. 



Genus Ach^us. — Leach. 



"Snout not much lengthened, and on each side leaving un- 

 covered the insertion of the stalk of the external antennas. The 

 terminal joint of the two posterior pairs of legs is large, com- 

 pressed and falciform." 



Ach^eus Cranchii. — Leach. — Crunch? 8 Spider Crab. — Not common. 

 Deep water among weed, and from its small size probably 

 frequently overlooked." 



Genus Inachus. — Fair. 



" Differing from the two former genera in having retractile 

 eyes capable of extensive motion, second pairs of legs thrice as 

 long as the first-frontal portion of the carapace ; terminal portions 

 of the four hinder pairs similar and slender." 

 Inachus Dorsetensis. — Leach. 



,, Scorpio — Couctis Cornish Fauna — 11 Scorpion Spider 



Crab. — Commonly taken in crab pots within a few miles of 



the shore at all depths," 

 "Inachus Dorhynchus — Leach — Feeble Lnachus. — Common, not 



unfrequently found on board crab boats." 

 "Except in the rostrum it has much of the aspect of Stenor- 

 hynchus longirotris, but is less common." 

 Lnachus Leptochirus. — Leach. 



,, Leptorhinchus — erroniously given by Fdivards and 

 Couch — Small Snouted Lnachus. — Taken off the coast of 

 Cornwall by Cranch. 



MA1AL)2Ej. (Maians.) 



Genus Pisa. — Leach. 



" Rostrum much developed, stout, formed of two lengthened 

 horns, somewhat conical ; stalk of the external antennas nearly 

 on the level of the rostrum." 



"Pisa Tetraodon — Milne Edwards, Crust., Vol. 1, p. 305 — Four- 

 homed Spider Crab. — Much larger than the other spider 

 crabs and far more formidable in appearance. Not common." 



Pisa Gibbsi. — Leach. — Globs' Spider Crab. Not uncommon 

 in from about twenty fathoms of depth, and taken in crab- 

 pots." 



