584 CALIFORNIA ACADEMY OF SCIENCES. 



ramus consists of a single, small, oblong joint which is 

 shorter than the peduncle and bears several plumose setae. 

 The second pleopods are a little longer than the first pair, 

 the inner ramus is shorter than the outer but like it di- 

 vided into several joints. In the third pair the inner ra- 

 mus is short but the outer one is long and slender and 

 reaches back further than the penultimate abdominal seg- 

 ment; the terminal joints are much elongated but towards 

 the base the annulations become closer. The fourth and 

 fifth pleopods are subequal and a little shorter than the 

 first two pairs; the inner rami are shorter than the outer 

 and like them are divided into several setose articulations. 



Uropods subequal in length and equaling or a little 

 exceeding the telson. The inner one is a little narrower 

 than the outer and subacute ; the outer one rounded at 

 the tip. Both are fringed on both sides with plumose 

 setce. Telson subrectangular, between two and three 

 times as long as broad, each outer margin furnished with 

 eight spines of which the terminal one is the largest. In 

 the emargination at the apex are 10-13 slender spines 

 which increase in length from the innermost one to the 

 second or third from the outermost. 



Color nearly transparent, with large black spots from 

 which radiate numerous irregularly branching streaks. 

 These spots do not occur on the carapax; there is 

 usually one on each side of each abdominal segment and 

 two on the anterior plate of the marsupial pouch. There 

 is a spot on the telson and another partly on the telson 

 and partly on the last abdominal segment. 



Length, 15 mm. 



Taken at Trinidad from a sandy beach in which they 

 burrow, June, 1894. "^^^ females had their marsupial 

 pouches filled with eggs or larvae. 



