58 JOUBNAIi OF ENTOMOLOGY AND ZOOLOGY 



11), are similar in shape, bemg long and narrow; the third is some- 

 what shorter than the fourth and fifth; hand narrow and armed 

 with a few hairs along each margin and two spine-like teeth at the 

 base; finger long and sharp. 



Length of adult male, 2 cm. 



Color a light yellowish brown with a few brown spots. 



Two adult specimens were taken at I.aguna Beach in July, 1914, 

 about a quarter mile ofli shore while dredging. Several specimens 

 of the young, both male and female (Fig. 13), were collected from 

 among the Rhodophyceae in shallow pools at low tide. They were 

 dark red in color like the seaweed and resemble the adults in every 

 respect except those mentioned above and the antennae, the superior 

 pair being but slightly longer than the inferior; flagellum with but 

 six to eight joints; inferior pair reaching to the last two joints of the 

 flagellum of the superior. 



Paedaridium breve n. sp. 



Peraeon (Plate III, Fig. 14) comparatively smooth; cephalon de- 

 void of a horizontally directed spine, and skull-shaped; neck very 

 short; first three body segments of nearly equal length and rather 

 stout; fourth segment about twice as long as the third and narrowing 

 at the caudal end; fifth and sixth segments a little longer than the 

 fourth and about half as broad; seventh about one-fourth as long 

 as the sixth and narrow. Superior antennas (Fig. 16), only slightly 

 longer than the first body segment; first segment short and stout; 

 second about twice as long and narrower; third shorter than the 

 second; flagellum made up of two joints and armed with a few short 

 hairs at the distal extremity. Inferior antennae (Fig. 16) devoid 

 of motor seta, nearly as long as the superior and fitted with a two- 

 jointed flagellum. Mandible (Fig. 15) with a three-jointed palp 

 armed with a few hairs; six irregular teeth on the mandible plate, 

 three of which are large, the first being split into two divisions. 

 Branchia on the third and fourth segments, ovate. Eyes small and 

 round. First gnathopod (Fig. 17) attached far forward on the 

 first segment; first joint long and narrow, longer than the palm; 

 wrist broad; palm similar in shape to that of the second gnathopod 

 and armed with two heavy spines at the base and numerous hairs 



