CANCROID E A. 257 



length. The species differs from the rufopunctata in its less deeply 

 dentate front, and its obtuse carpus. 



Grapsillus maculatus, M'LEAY, Crust, of Smith's Illust. Zool. S. Africa, p. 67. 



Trapezia maculatus, KRAUSS, Siidaf. Crust., 36. 



Trapezia guttata? RiippELL, Krabben des rothen Meeres, 27. 



Trapezia tigrina, EYDOUX and SOULEYET, Yoy. de la Bonite, pi. 2, f. 4. 



TRAPEZIA CYMODOCE (Gueriri). 



Frons leviter sinuosus. Dene orbitce inferior nan prominens. Dens cara- 

 pacis lateralis aut obtusus aut obsolescens. Pedes antici &ubcequi, 

 carpo angulum internum obtiiso aut rotundato, brackio dentato. Pedes 

 8 postici mediocres. 



Front somewhat sinuous. Inferior orbital tooth not prominent. 

 Tooth on either side of carapax obtuse, or nearly wanting. Ante- 

 rior feet subequal; inner angle of carpus obtuse or rounded, arm 

 dentate. Eight posterior feet of moderate size. 



Plate 15, fig. 5 a, specimen from Tahiti, enlarged; J, abdomen; c, 

 outline of front between the orbits, enlarged, of a specimen from the 

 Sandwich Islands ; d, under view ; e, male abdomen ; /, extremity of 

 leg of third pair; g, extremity of tarsus; h, outline of right arm (r, 

 outline of carpus) ; i, outline of left arm of same individual. 



Tahiti; also Sandwich Islands. 



Length of carapax of Tahiti specimen, four and one-half lines; 

 breadth, five and three-fourths lines; of specimen from the Sandwich 

 Islands, length, five lines; breadth, six lines. From either of the 

 preceding, this species differs in having the lateral tooth of the carapax 

 obtuse or obsolescent, at the same time the inner angle of the carpus 

 is obtuse, and the front is not very strongly sinuous. The colour is 

 orange ; fingers, grayish or brownish yellow. The tarsus is shown in 

 figures /, g. The obtuse short spines at the extremity, in two parallel 

 but imperfect series, have a brownish-yellow colour, and are very dif- 

 ferent in appearance from the spines behind. The under view, figure 

 d, represents the general character of the maxillipeds in the Trapezice. 



65 



