CKUSTACEA. 
69 
Genus Hyas. — Leach. 
“ Distinguishod from Pisa by the absence of the strong spine 
■W-hich in that genus forms the anterior portion of the circle of 
the orbit ; and by the second member of articulation of the 
outer antennso being flattened and widened on the outer side. 
Hyas Aeaneus — Linnoeus; — Spider Ilyas. — Milne Edwards, JList, 
des Crust, Vol. 1, p. 312; Leach, Malao. p. 121; Pennant, p. 19, 
ftg. 16. — Off the 8. coast of Cornwall. O.S.B. 
Hyas Coarcuatus. — Leach, Mai. pi. 21 ; Milne Edwards, Ilist. des 
Crust, Vol. \,p. 312.— Off the S. coast. O.S.B. 
Although Mr Couch wrote in the previous edition of his 
Cornish Fauna that he was not acquainted with either of these 
species and therefore supposed them not to be common, it is 
recorded as having been taken off the Cornish Coast upon his 
authority in Bell’s Crustacea. And he also mentioned that 
specimens taken off the coast of Cornwall are in the museum of 
'tile Athenasum at Plymouth. 
Genus Maia. — Lam. 
“ The stalk of the external antenn® inserted into the internal 
angle of the orbit, and uncovered ; nippers of the hand slender 
and pointed.” 
Haia Squinado — Herbs, Corwich or Sherry. — Milne Edwards, 
Ilist. des Crust., Vol. p. 327. 
Mr. Couch in the previous edition of the Cornish Fauna mis- 
took the Mediteranean species, M, Verrucosa, for this, but it 
differs in having tubercles instead of spines on the dorsal surface. 
Mr. Couch says that this species “in its season is the most abun- 
dant species of the family, and by far the largest, sometimes 
treighing as much as five pounds, and the carapace measuring 
trom nine to ten inches in length ; so that it is commonly used as 
^ood, though only by poor people and fisher-boys, who find in it 
a delicate meal. Its not tempting form and the small size of the 
^6gs conspire to exclude it from the tables of the rich.,^ 
Tbe information in Bell’s account of this animal in his British 
stalk-eyed Crustacea is mostly from the pen of Mr. Couch, and I 
I'terefore do not hesitate to transfer it in full. He says “ This 
the most abundant of all the crabs found on our coast, but it 
'^Qes not make its appearance as early in the season as the 
