60 AMPniPODA NOBMALIA. 



squamifoiin coxa. Second pair of gnathopoda having the coxa 

 verjf deep and pectinated along the inferior margin ; the carpus 

 produced inferiorly ; the propodos narrower near the cai-pal arti- 

 culation than at the palm, Avhich is slightly oblique, convex, 

 and fiingcd with hairs, inferior margin nearly parallel with the 

 supeiior, superior margin arcuate. The first pair of pereiopoda 

 long, slender, having the coxa very deep, the inferior margin 

 pectinated. The second pair of pereiopoda have the coxa very 

 large, the inferior edge fringed with five or six equidistant solitaiy 

 cilia situated above the margin. The thii'd pair of pereiopoda 

 have the coxa about half as deep as the preceding ; the basos 

 squamifonnly developed, and similar in form and length to the 

 two posterior pairs. The three anterior segments of the pleon 

 are dorsally, but not importantly, produced posteriorly. The 

 penultimate and antepenultimate pairs of pleopoda have each theii" 

 i-ami unequal. The posterior pair of pleopoda are shorter than 

 the preceding. 



This species was taken from some trawl-refuse brought from 

 near the Eddystone Lighthouse. I have selected the specific name 

 because, having seen but one specimen, I am in doubt as to the 

 correctness of some of the minuter details. Unfortunately the animal 

 of this veiy pretty species has not been presei-ved. 



3. STENOTHOE. 



Stenothoe, Dana, U.S. Uxplor. Exped. p. 923. 

 Antennae simple. Maxillipeds pediform, having a rudimentary 

 squamiform process upon the basos only. The coxa3 of the fii'st 

 pair of gnathopoda, as well as the coxae of the three succeeding 

 pairs of appendages, largely developed. The basos of the ante- 

 penultimate pair of pereiopoda squamiformly developed, as well as 

 of the two posterior paii's, all of which are subequal. Fii-st pair 

 of gnathopoda small, the second veiy large. Posterior pair of pleo- 

 poda unibranched, the ramus biarticulate. Telson squamiform. 



This genus was founded by Dana to receive a species which he 

 obtained at Rio Janeiro. It appears to be the representative, upon 

 the American shores, of our genus Montagua, from which it differs 

 in no veiy great degree. 



1. Stenothoe validus. (Plate IX. fig. 6.) 



Stenothoe validus, Dana, U.S. Explor. Exped. p. 924. pi. 63. f. 1. 



" Male. — Coxae very large, fifth qiiite small. Ej^es small and round. 

 The four antennae subequal ; base of inferior pair longer than 



