CALIFORNIA STALK-EYED CRUSTACEA. 213 



It was owing to the affinities of my pacifica with X. 

 compressa (De Haan) that I was led to put the former 

 species in the genus Miersia, the Ephyra? compressa (De 

 Haan) having been placed in Miersia in Kingsley's 

 revision of the genera of the Atyidse. Mr. Kingsley, 

 however, was wrong in referring compressa to Miersia, 

 for, as Bate has pointed out, the type of that genus, M. 

 pelagica, is marine and belongs properly in a different 

 family. 



Syncaris pacifica (Holmes). 



Miersia pacifica HOLMES, Proc. Cal. Acad. Sci. (2), Vol. IV, 1895, p. 577, 

 PI. XXI, figs. 27 and 28. 



Rostrum slender and about as long as the carapace; upper margin armed 

 with one or two spines, the lower with 5-9 spines. A pair of supraorbital 

 spines. Antennular flagella subequal, the outer one with a thickened 

 basal portion. Antennal scale reaching about to the tip of the rostrum. 

 All the pereopods except the last pair furnished with exopods. The first 

 pair of legs is short, the carpus short and distally widened, the end exca- 

 vated to receive the basal prominence of the palm. Second pair of legs 

 longer than the first; carpus longer than the hand. The three following 

 pairs are subequal; dactyls short. Telson tapering to a truncated or 

 broadly rounded tip. 



Length, 5 cm. 



Sonoma County, Calif., (L. E. Ricksecker coll.) Types 

 in the Museum of the California Academy of Sciences. 



Syncaris Trewi, sp. nov. 



Carapace with supraocular and subocular spines; a tooth at the 

 antero-inferior angle. Rostrum slender, slightly upturned, and about 

 one-half the length of the carapace; the upper side is rounded and devoid 

 of teeth, the lower margin armed with 3-5 teeth on its distal half. The 

 basal spine of the antennules reaches slightly beyond the tip of the first 

 joint; flagella subequal and about as long as the carapace exclusive of the 

 rostrum; the basal third of the outer flagellum is markedly thicker than 

 the distal portion. Antenna? nearly as long as the body; acicle oblong, 

 about equalling the rostrum, sides nearly parallel, tip broadly rounded 

 and projecting considerably beyond the spine at the end of the outer 



