REPORT ON THE CRUSTACEA MACRURA. 



895 



Second pair of antennae carrying a long scaphoeerite ; flagellum slender and subcqual 

 with the length of the animal. 



Pereiopoda pediform, slender, simple ; the third, fourth, and probably the fifth pairs 

 are long and remiform, each carrying a long basecphysis. The fifth pair in all the 

 specimens has been broken at the basisal joint, which is remarkable for its very 

 large diameter. 



The pleopoda biramose. 



Observations. — The first three pairs of appendages in this genus, the eyes, and two 

 pairs .of antennae, are attached to a portion of the cephalon projected in front of the 

 carapace, which still retains the embryonic ocellus. 



, Geographical Distribution. — Of the species of this genus one was taken in the Pacific, 

 south of Japan, and three near the Cape Verde Islands in the Atlantic. 



Eretmoearis remipes, n. sp. (PL CXLV. fig. 1). 



Carapace anteriorly produced to a slender rostrum that is about half the length of 

 the carapace, and armed with two teeth on the rostrum, the anterior being the smaller, 

 and with one on the gastric region. Orbit not well defined, but a small tooth corresponds 

 with the first anteunal tooth, and a supraorbital tooth stands just above it ; the fronto- 

 lateral angle defined by a strong tooth, thence the lateral margin is smooth. 



First pair of gnathopoda short and robust, terminating in an obtuse extremity, and 

 carrying a long basecphysis. 



Second pair of gnathopoda long, slender, and six-jointed, as are all the pereiopoda, each 

 of which carries a long and slender basecphysis ; the third and fourth pairs have the 

 propodos enlarged and flattened near the middle and narrowing towards each extremity, 

 and the dactylos is long and styliform ; the fifth pair has the coxa and basis extremely 

 large and robust ; the rest of the appendage is lost. 



Pleopoda, excepting the first pair, biramose, the posterior pair longer than the 

 telson. 



