16 



RICHARDSOX — FOUR NEW SPECIES OF ROCINELA. [Jan. 21, 



Fig 8. — Rocinela 

 japonica, ^, X l|^- 



at the sides beyond the terminal segment and the basal joints of the 



uropods. The terminal segment is liriguate and obscurely crenulate 

 on its posterior margin. The internal branch of 

 the uropods is somewhat longer than the external 

 one, but the two are equal in width. They are 

 both armed with spines on their outer margins. 



The prehensile legs are slender. There are 

 three or four hair-like spines on the propodus and 

 five blunt ones on the merus. The gressorial legs 

 are likewise slender and spinulose. 



Of this species a single individual was found at 

 Hakodate Bay, Japan, Station 3659, depth fifteen 

 and a half fathoms (U. S. Nat. Mus., No. 20651). 

 This species is closely related to R. modesta 

 Hansen. It differs from that species in the length 

 of the first pair of antennae, which extend only to 

 the middle of the last joint of the peduncle of the 

 second pair of antennas, while in R. modesta Han- 

 sen they extend a little beyond the peduncle of the 

 second pair of antennae ; in the greater develop- 

 ment of the lateral margin of the head in front of 

 the eye into lobes ; in the excavation in the frontal 

 area of the head ; in the extreme front being 

 directed upward ; in the number of spines on the 



Fig. 9. — Leg of first merus of the prehensile legs, five spines being 



pair, X 3. Leg of characteristic in our species, three or four in Dr. 



^ ^' ^' Hansen's species ; in the markings on the surface 



of the body of small black dots and the presence of two larger spots 



at the base of the terminal segment of the body. 



Rocinela tuberculosa, sp. nov. Fig. 10. 



Surface of body punctate and marked with small 

 black dots. The posterior margin of each of the tho- 

 racic and abdominal segments is lined with a row of 

 tiny tubercles, above which is a row of small black 

 dots. 



Head subtriangular, rounded in front. Eyes large 

 and situated at a distance of one-third of the head apart. 

 The first antenna, with a flagellum of five articles, 

 reaches the posterior margin of the head ; the second 

 vela tiibercii- antennae extends to the posterior margin of the second 

 o^ci,^, X 2y. thoracic segment; its flagellum contains eleven articles. 



Fig. 10. — Rod 



