418 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



the schooner Augusta A. Johnson, of Gloucester, Mass., gives the fol- 

 lowing measurements : 



mm. 



Length of carapax, including frontal teeth 88. 2 



Breadth, including lateral teeth 101. 7 



Breadth in front of lateral teeth 93. 5 



Length of posterior legs 18U. 



Bathynectes longispina Stimpson, Bull. Mus. Comp. Zool. Cambridge, ii, p. 146, 

 1870. — A. Mihie-Edwards, Crust. Eegiou Mexicaine, p. 234, i)l. 42, tig. 1, lb79, 



Stations 871, 872, 874, 879 ; 85 to 225 fathoms. 



Stimpson's and Milue-Edwartls's specimens were from the Straits of 

 Florida. 



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 ftithoms, 

 forty-nine specimens were taken. 



A large part of the specimens are much larger than those described 

 by Stimpson, wliich were from 74 fathoms, in Pourtales's dredgings in 

 the Straits of Florida. A male, from station 878, gives the following 

 measurements: Length of carapax, 16.9"""'; breadth, 1G.8"""; breadth 

 between tips of carpal spines, with the chelipeds closed, 42""" ; length of 

 carpal spine, 8"™. 



Ethusa miciophthalma, sj). 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 

 <leep sinuses at the extremities of the antenuulary fossse, 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 cylin- 

 drical, and the digits are alike, fully as long as the basal portion, 

 strongly compressed, longitudinally grooved, slightly curved laterally, 



