C A R I D E A. 561 



majare mediocri, levhisculd, compressd, margine inferiore rotundato, 

 digitis scabriculis, dimidio manus paulo brevioribus, vix dentigeris; 

 maris cequi, crassiores, digitis brevibus, valde incurvatis, immobili 

 crassd unidentato. Pedes 2di Bills paulo longiores, articulo carpi 

 Imo plus duplo longiore quam 2dus, 2do 3tlo <itoque brevibus. Arti- 

 culus pedum sequentium Stius extus prope basin spind armatus. 



Front slightly arcuate, at middle obsoletely excavate. Basal scale of 

 outer antennae of moderate size, a little shorter than base, and as 

 long as base of inner pair ; flagellum broad compressed, outer spine 

 short ; basal spine of inner antennae long. Anterior feet of female 

 very unequal, larger hand of moderate size, nearly smooth, com- 

 pressed, inferior margin rounded, fingers scabriculate, nearly half as 

 long as hand, without distinct teeth ; of male equal, stout, fingers 

 short and much incurved, the irnmoveable one with a large tooth. 

 Feet of second pair little longer than third, first joint of carpus 

 more than twice as long as second, second, third, and fourth short. 

 Third joint of following feet on outside, near its base bearing a 

 spine. 



Plate 35, fig. 12 a, front of female, magnified two diameters; b, 

 caudal segment ; c, outer maxilliped, ibid. ; d, larger hand, ibid. ; e, 

 part of second pair, ibid. ; /, part of third or fourth pair, ibid. 



Valparaiso, Chili. 



Length of body, one and a half inches. This species is near the 

 Alpheus emarginatus of Edwards, but has a short spine to base of 

 outer antennae. The second joint of the inner antennae is rather 

 longer than the first. The basal spine of the inner pair extends very 

 nearly to apex of second joint. The second joint of the carpus of the 

 second pair of legs is hardly longer than the third, and the hand is 

 about one-half of the length of the carpus. The male referred to 

 this species is like the other specimens in form, front, antenna}, eight 

 posterior legs ; but differs in the hands, which have the moveable 

 finger very much incurved, with two teeth on the basal half of its 

 inner margin; and the tooth of the other finger is a long low triangle, 

 with the hypothenuse on the upper side, which side is nearly flat. 

 The outer maxillipeds are narrow, and the hairs are throughout quite 

 short. 



141 



