418 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
the schooner Augusta A. Johnson, of Gloucester, Mass., gives the fol- 
lowing measurements: 
mm 
lacnothiotscarapax imceludin es frontal teeth)s--so6 e-semei se ieeee ee eles ans oes 88. 2 
Breadcorinelidimeslatera beet bite ccsin nin cieeietetaeye ote esto aie ie ee toe oeiaicloee 101.7 
Breadihintront of lateral tech co... 22 cectacnce -) > anoeet seeeteeeee eee eee eee 96. 5 
Wenouhiot Posterior] COSi ==) saemteyecemice aes ciclsne WE sce A eee ee Se Sees ie 180. 0 
Bathynectes longispina Stimpson, Bull. Mus. Comp. Zool. Cambridge, ii, p. 146, 
1870.—A. Milne-Edwards, Crust. Région Mexicaine, p. 234, pl. 42, fig. 1, 1879, 
Stations 871, 872, 874, 879; 85 to 225 fathoms. 
Stimpson’s and Milne-Edwards’s specimens were from the Straits of 
Tlorida. 
Acanthocarpus Alexandri Stimpson, Bull. Mus. Comp. Zool. Cambridge, ii, p. 153, 
1870. 
Stations 870 to 874, 877, 878; 85 to 155 fathoms. At 878, 142 fathoms, 
forty-nine specimens were taken. 
A large part of the specimens are much larger than those described 
by Stimpson, which were from 74 fathoms, in Pourtaleés’s dredgings in 
the Straits of Florida. A male, from station 878, gives the following 
measurements: Length of carapax, 16.9"; breadth, 16.8"; breadth 
between tips of carpal spines, with the chelipeds closed, 42°"; length of 
carpal spine, 8"". 
Ethusa microphthalma, sp. nov. 
Female.—The carapax is as broad as long, but very much narrowed 
anteriorly, so that in front it is only half as broad as the widest part, 
which is at the swollen branchial regions posteriorly. The front between 
the orbits is less than half as wide as the entire front, and, as seen from 
above, is divided by a triangular median sinus and two slightly less 
_ deep Sinuses at the extremities of the antennulary foss, and the angles 
between and outside of these sinuses are spiniform, so that the front 
between the eyes is armed with four similar and nearly equidistant 
spines, of which the lateral are slightly more prominent than the 
median. The orbital sinuses are nearly as deep as broad, and formed 
on the outside by the spiniform antero-lateral angles, which reach nearly 
as far forward as the spines of the front. The antero-lateral margins 
are long and nearly straight. The dorsal surface is slightly convex and 
not deeply areolated, though the cervical suture is well marked, and the 
whole surface is granular and slightly pubescent, except on the cardiac 
and gastric regions, where the granulation is nearly obsolete. 
The eyes are small and on very short peduncles, so that they do not 
nearly reach the angles of the orbital sinuses; the cornea is terminal, 
not expanded, and the pigment is black. 
The chelipeds are equal, small, and very slender; the chela is scarcely 
stouter than the carpus, the basal portion is smooth and nearly ecylin- 
drical, and the digits are alike, fully as long as the basal portion, 
strongly compressed, longitudinally grooved, slightly curved laterally, 
‘ 
