CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION 51 



brown. Eyes always red. The young are often dark olive with a 

 yellowish pubescence. 



Besides the sharp tubercles, a character distinguishing- this species 

 from C. iDigulatns may be found in the front, which in the latter 

 species is deeply sinuous, the median lobes projecting, while in the 

 monticitlosus it is blunt, often bimarginate, and projects but little. 



Found among corals at slight depths at Loo Choo, at the Bonin 

 Islands, and at Tahiti. It also occurs at the Fiji and Navigator 

 Islands, and in Balabac Straits (Dana). 



72. CHLORODIUS DENTIFRONS' Stimpson 



Plate VI, Fig. 5 



Chlorodius dentifrons Stimpson. Proc. Acad. Nat. Sci. Phila., x, p. 34 

 hi]. 1858. 



Carapax anteriorly expanded; proportion of length to breadth, 

 I : 1.35. The anterior three-fourths of the surface is well areolated; 

 the longitudinal sulci are deeper than those having a transverse 

 direction, particularly on the gastric region, w^here the two grooves 

 proceeding backward from the front and dividing in two the lateral 

 lobes of this region, are strongly marked, and reach nearly to the 

 posterior margin of the lobes. The more protuberant parts of the 

 areolets. particularly of the lateral ones, are strongly granulated. The 

 transverse raised line crossing the carapax from one lateral tooth to 

 the other is well marked in this species, convex behind, and ciliated. 

 This line marks off the smoother posterior part of the carapax, 

 which constitutes rather less than a fourth part of the whole length. 

 There is also a slight ridge just above and parallel with the pos- 

 terior margin ; this is interrupted at the middle. Antero-lateral 

 margin with four small, sharp equidistant teeth, besides the angle of 

 the orbit. Front rather narrow, considerably projecting, and quad- 

 ridentate ; the lateral teeth a little smaller than the middle ones. 

 Orbital margin with deeper and more strongly marked fissures than 

 are seen in other species, giving it a toothed appearance. Chelopoda 

 of rather small size, even in the male ; upper surface rugulose ; car- 

 pus with two or three small teeth above ; hand with one small basal 

 tooth and three or four minute ones along the upper margin ; outer 

 surface of hand covered with minute transverse granulose rugae, as 

 in C. cxaratus : fingers well curved toward their excavated tips, very 

 little gaping, small-toothed within, and brown in color, the brown of 



^ Btisodes clcctra (Herbst). 



