678 CLASS X. 
Gelasimus Latr. Peduncles of eyes slender, cylindrical, with 
eyes terminal. Shell broader than long, trapeziform. 
Sp. Gelasimus vocans, Cancer vocans L., De GrER Mém. p. s. & ? Hist. des 
Ins. vit. Pl. 26, fig. 12, from the coast of Brazil. Comp. Linn. Amen. 
Acad. vi. p. 414 3—Gelasim. Marionis Dus. Crust. Pl. 13, fig. 1, &e. 
Ocypode Latr. Peduneles of eyes acuminate, with a horn pro- 
duced beyond the eyes. Shell subquadrate. 
Sp. Ocypode ceratophthalma Fasr., Cancer cursor L., Pauuas Spicil. Zool. 
Ix. p. 83, Tab. v. figs. 7, 8, Dusmar. Crust. Pl. 12, fig. 1; from the Red 
Sea and the Indian Ocean. 
Add genera Uca Luacnu, Cardisoma Latr., M acrophthalmus Latr., 
Oleistostoma Der Haan, Hymenosoma Leacu, Myctiris Latr., Doto 
Dr Haan, &. Comp. De Haan Faun. Japon., Crust. p. 5, 
pp. 24—30. Here also belongs genus Halicarcinus WHITE. 
B. Fourth joint of maxilliform feet placed on the inner angle of 
third joint. 
Shell mostly arcuate anteriorly, with margin convex, truncated 
posteriorly. 
Telphusa LAatR. Shell depressed, smooth, cordate, broad. Ex- 
ternal antenne very short, inserted near the peduncles of eyes. 
Sp. Zelphusa fluviatilis Latr., Crabe de riviére OutvirrR, Voyage dans 
VEmpire Othoman, Pl. 30, fig. 2, Desmar. Crust. Pl. 15, fig. 2; in fresh 
water in the south of Italy, Greece, Egypt, &c. 
Here belong also the genera Boscia Epw. and Trichodactylus LAtR. 
Eriphia LAatrR. Shell cordate or trapeziform. External antenne 
exsert, remote at their insertion from the petioles of eyes. 
Sp. Lriphia spinifrons Latr., Cancer spinifrons HERBst, FABR., DESMAR. 
Crust. Pl. 14, fig. 1. 
Add genera Ruppellia Epw., (Hudora Dr Haan), Trapezia Latr. 
Cancer Fapr. (species from Cancer L., div. brachyur.). Shell 
broad, anteriorly arcuate, gibbous. Chele thick. Hight remaining 
feet with last joint styliform, not natatory. Third joint of maxilli- 
form feet of third pair quadrate. 
Sp. Cancer pagurus, Platycarcinus pagwrus Latr., Epw., Desmar. Crust. 
Pl. 8, fig. 1; Benn Brit. Crust. p. 59; the common sea-crab; 6 inches 
broad or broader, the shell reddish brown, granularly uneven and on each 
side with nine incisures or grooves ; the shears smooth and, as in other 
species of this division, black at the poimt; this species is edible and 
very tasty. 
