PORTUNIDAE. 61 
Callinectes alexandri, sp. nov. 
Pl. 2, Fig. 7; Pl. 9, Figs. 3, 3a, 36. 
Young male. Extreme width of carapace about 22 x the median length. 
Regions well marked, as well as the two areolae at the inner angle of the 
branchial region. Granules of dorsal surface squamiform and conspicuous ; 
most scattered on the anterior third, finest and most crowded on the pos- 
terior third. The granules of the customary ridges (two gastric and one 
branchial) are more beadlike. The median length of the intramedial region, 
or that part of the gastric region situated behind the second ridge, is nearly 
4 its anterior width. 
Frontal teeth four, besides the orbital pair. Median pair tuberculiform, 
not more than } the area of the triangular, obtuse, outer pair. Inner orbital 
tooth lobiform and a little less advanced than the median teeth. Superior 
fissures of orbit well marked, but closed ; inner suborbital lobe subacute, not 
very prominent. 
The outer orbital tooth, or the first tooth of the lateral series, is equi- 
lateral or subacute. ‘Teeth 2 to 7 inclusive are saw-teeth, that is, shorter 
on the anterior than on the posterior margin; the second, third, and fourth 
are acute, the fourth, fifth, and sixth are acuminate and slightly concave on 
the posterior margin. Eighth tooth curved forward, acuminate. The mid- 
rib of the ninth projection, or the lateral spine, is quite transverse ; its length 
is about + of the carapace, exclusive of the lateral spines. 
The shape of the abdomen of the young male is probably not that of 
the adult; the sixth segment tapers gradually to the distal end, the seventh 
is equilateral. 
Chelipeds very finely rugose, the costae of wrist and hand prominent and 
more closely granulate ; three strong curved spines on the anterior margin 
of the merus; posterior margin unarmed. The outer spine of the carpus is 
well developed, though much smaller than the inner. Of the two spines 
of the palm, the proximal is curved, the distal is very slender. 
Dimensions : — Length of 2, type, 14.8 mm.; entire width, 30.7 mm.; 
length of lateral spine, 5 mm. 
Distribution : — 
Papeete, Tahiti; shore; Nov. 9, 1899; 1 ¢, juv., type (Cat. No. 32,854, 
eit. N. M.). 
Suva, Fijis; shore ; Dec. 13, 1899; 1 °, juv. 
