186 CALIFORNIA ACADEMY OF SCIENCES. 



which he erroneously considered to belong to clamator 

 Lock. Afterwards Lockington, perceiving that Kings- 

 ley's clamator was not true to name, rechristeiied the 

 species A. barhara. The following is Kingsley's descrip- 

 tion: 



"Basal spine of antennulae stout, short, not reaching second joint 

 of peduncle; third joint half as long as preceding. Antennae without 

 spine on the basal joint. Antennal scale narrow, the spine at the antero- 

 exterior angle acute, slender, reaching the end of the antennular peduncle. 

 External maxillipeds rather broad, extending slightly beyond the antennal 

 scale. Feet of first pair unequal. Merus smooth, with a very slender 

 spine on the distal portion above. Larger hand compressed, a constriction 

 of each margin at about the middle, a spine above the articulation of the 

 dactylus, behind which a sulcus runs obliquely across the superior mar- 

 gin. A second spine on the outside; thumb slender; dactylus compressed, 

 semicircular in outline viewed from the side, slightly longer than the 

 thumb. Smaller hand with both margins constricted; upper margin of 

 palm tuberculate; a spine above the articulation of the dactylus; fingers 

 about equal to the palm, completely closing. Ischium and merus of 

 second pair equal; carpus five-jointed, first two joints equal, and each as 

 long as the third and fourth, which are also equal; fifth joint nearly as 

 long as the first. Merus joints of posterior pairs without spines; propodal 

 joints spinulose beneath; dactyli slender. Santa Barbara, Cal. (W. G. W. 

 Harford)." 



Alpheus californiensis, sp. nov. 



Anterior portion of the carapace convex and furnished with a fine longi- 

 tudinal line. Kostrum short, acute, continuous behind with a short 

 carina, which is separated from the ocular lobes on either side by a deep 

 groove. Ocular lobes rounded in front and devoid of a tooth or spine. 

 Antero-lateral angle of the carapace broadly rounded. Basal antennular 

 spine broadly ovate, acuminate, and scarcely reaching the tip of the first 

 joint of the peduncle; third joint of the peduncle less than half the length 

 of the second; outer flagellum nearly one-half as long as the inner one, 

 the slender, terminal part about one-half the length of the basal portion; 

 inner flagellum about one-half the length of the body. Antennae about 

 as long as the body; peduncle slightly exceeding that of the antennules; 

 a small spine on the infero-distal margin of the second basal joint; acicle 

 not reaching the tip of the peduncle, outer margin slightly concave and 

 terminating in a strong spine, which is separated from the membranous 

 portion by a deep, narrow cleft. Maxillipeds somewhat exceeding the 



