THE SPIDEE CBABS OF AMERICA 



253 



B>. Posterior angle of hepatic projection broadly rounded. Basal antennal 

 article without a large tubercle at antero-external angle. 

 C. Rostrum long; total carapace length is to rostrum length as 4.5:1 in 

 medium specimens up to 6.4:1 in largest specimen. 



coarctatus, typical, p. 258. 

 O. Rostrum shorter and broader; total carapace length is to rostrum length 

 as 7:1 in medium specimens up to 9.3:1 in large specimens. 



coarctatus alutaceus, p. 258. 



B^. Posterior angle of hepatic projection subacute. Basal antennal article with 



bead tubercle at antero-external angle lyratus, p. 270. 



r 



Fig. 91.— Htas ar.4.neus, male, dorsal \nEw, X 1.55. (After Smith, ms.) 

 HYAS ARANEUS (Linnaeus) 



TOAD CRAB. HARPER (Leach) 

 Plates 92 and 93 



Cancer araneus Linnaeus, Syst. Nat., ed. 10, vol. 1, 1758, p. 628 (type-locality, 

 in Oceano Europaeo; type not extant). Not Cancer araneus Herbst, 

 Naturg. Krabben u. Krebse, vol. 1, 1785, p. 206. 



Cancer bufo Herbst, Naturg. Krabben u. Krebse, vol. 1, 1790, p. 240 (wrongly 

 242), pi. 17, fig. 95 (type-locality, in der Nordsee; type in Berlin Mus.). 



Inachus araneus Fabricius, Entom. Syst., SuppL, 1798, p. 356. 



Maja bufo Bosc, Hist. Nat. Crust., vol. 1, 1802, p. 255. 



Maja araneus Leach, Edin. Encyc, vol. 7, 1814, p. 394. 



