HYAS. 
CANCER, Herhst. 
MAJA, Bose. 
INACHUS, Fabricii. 
HYAS, Leach. 
Antennce externce distantes, articulo primo externe dilatato secundo Iong-iore. 
Pedipalpi externi, articulo secundo ad apicem internum emarginato. 
Pedum par primum aliis crassius, didactylum, aequale, maris corpore long’ius, FogminvE corporis 
longitudine : paria alia elongata, simplicia. 
Testa elongato-subtriangularis, subtuberculata, lateribus pone oculos hastato-productis, fronte 
rostrato ; rostro fisso, Iaciniis approximatis. 
Oculi pedunculo baud crassiores. 
Abdomen 7-articulatum. 
External antennas 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 leg’s 
thicker than the others, didactyle and equal ; of the male longer than the body, of the fermde 
as long as the body. Shell elongate-subtriangular, slightly tuberculated, the sides behind the eyes 
with a spear-shaped process, the front rostrated, the rostrum figured, the lacinim nearly parallel. 
Eyes not thicker than the peduncle. Abdomen seven-jointed. 
Of this Genus two species have been discovered in the British seas. 
HYAS ARANEUS. 
Tab. XXI. a. 
II. testa processu hastiformi postice tuberculato. 
Cancer araneus. Linn. Syst. Nat. i. 1044. 
Fn. Sv. 493.2030. 
Cancer Bufo. Herbst. i. 242. tab. xvn. fig. 59. 
Inachus araneus. Fabr. Suppl. Ent. Syst. 356. 
Maja Bufo. Bose. Hist. Nat. des Crust, i. 255. 
Maja araneus. Leach Edinb. Eneycl. 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. fiemin/E abdomen. 4. Antenna 
externa. 5. Pedipalpus externus. 
This species of Hyas is very abundant on the coasts of Scotland and of 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 the coast of Mernshire, near Montrose, by G. Milne, Esq. 
and on that of Kent, near Sandgate, by myself. 
