HY AS. 
CANCER, Herbst. 
MAJA, Bosc. 
INACHUS, Fabricii. 
HYAS, Leach. 
Antenne externe distantes, articulo primo externé dilatato secundo longiore. 
Pedipalpi externi, articulo secundo ad apicem internum emarginato, 
Pedum par primum aliis crassius, didactylum, equale, Maris corpore longius, Fa:mtx corporis 
longitudine : paria alia elongata, simplicia. 
Testa elongato-subtriangularis, subtuberculata, lateribus pone oculos hastato-productis, fronte 
rostrato ; rostro fisso, laciniis approximatis. 
Ocult pedunculo haud crassiores. 
Abdomen 7-articulatum. 
External antenne distant, the first joint larger than the second, and dilated externally. 
External pedipalpes with the internal apex of the second joint notched. First pair of legs 
thicker than the others, didactyle and equal ; of the male longer than the body, of the female 
aslongasthe body. Shell elongate-subtriangular, slightly tuberculated, the sides behind the eyes 
with a spear-shaped process, the front rostrated, the rostrum fissured, the laciniz nearly parallel. 
Kyes not thicker than the peduncle. Abdomen seven-jointed. 
Of this Genus two species have been discovered in the British seas. 
HYAS ARANEUS. 
Tan SX 7a. 
IH. testa processu hastiformi posticé tuberculato. 
Cancer araneus. Jinn. Syst. Nat. i. 1044. 
Fn. Sv. 493. 2030. 
Cancer Bufo. Herbst. i. 242. tab. xvii. fig. 59. 
Tnachus araneus. Fabr. Suppl. Ent. Syst. 356. 
Maja Bufo. Bosc. Hist. Nat. des Crust. i. 255. 
Maja araneus. Leach Edinb. Encycl. vii. 394. 
Hyas araneus. Leach Edinb. Encycl. vii. 431. 
Trans. Linn. Soc. xi. 328. 
Encycl. Britan. Suppl. i. 416. 
Fig. 1. Hyas araneus mAs. 2. MARIS abdomen. 3. raminz% abdomen. 4. Antenna 
externa. 5. Pedipalpus externus. 
This species of Hyas is very abundant on the coasts of Scotland andof Kent. On the shores 
of Devonshire it is of rare occurrence. 
The young is frequently found inhabiting pools of water amongst the rocks at low tide, and 
is often covered with fragments of marine plants, which adhere to the hairs of the legs and shell ; 
in this state it has been observed on tke coast of Mernshire, near Montrose, by G. Milne, Esq, 
and on that of Kent, near Sandgate, by myself. 
