224 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



shows a specimen with a body somewhat broader. The superior 

 antennEe are about half as long as the body, first joint broader than 

 second, but shorter; second joint longest of all; third longer than 

 first, and narrower than second; flagellum shorter than the ped- 

 uncle and made up of about twelve joints. Inferior antennae 

 slightly shorter than the peduncle of the superior. Mandible 

 (Fig. 14) cutting edge denticulate, with five irregular teeth, spine 

 row having three large, feathery spines; molar tubercle strong 

 and prominent. First gnathopod attached far forward, against 

 the maxillipeds; hand triangular, fringed with hairs on the inner 

 margin and one spine tooth near the base. Second gnathopod 

 (Figs. 15, 16) attached near the posterior extremity of the second 

 pereiod, basal joint nearly as long as the hand, inner margin of 

 hand lying in a straight line and armed with two teeth near the base 

 of the palm, one on the lobe and the other to one side. Another 

 long tooth is near the base of the finger and is separated from a 

 large, broad tooth by a deep suture; inner margin of the finger 

 irregular. Third, fourth and fifth peraeopods are similar in 

 structure and not as stout as those of C. geometrica; hands power- 

 ful and armed with three clumps of spines on small prominences; 

 differing in this respect from those described by Mayer, Sars and 

 others in that they lack the pair of serrated spines at the base of the 

 palm. Finger stout and half as long as the palm. 



Length of specimen, 12 mm. 



Color white or flesh color. 



The specimens were collected during the latter part of July at 

 Laguna Beach, from the seaweed in the inner tide pools. 



Caprt'lla aqiiUibra Say 



The peraeon (Plate IV, Fig. 12) is comparatively smooth, with 

 the cephalon devoid of a horizontal spine; the first three segments 

 are long and narrow, of nearly equal length, the fourth a little 

 longer than the third, the fifth twice as long as the sixth and sev- 

 enth combined. The branchia are ovate in shape and moderate 

 in size. Between the bases of the second gnathopods is a sharp 

 projection (Fig. 13), and on each side another spiniform process 

 pointing anteriorly. Superior antennae slightly over half as long as 



