HEMISIRIKLLA ABBHEVIATA. 195 



Distribution. — S. aequircmis was established on specimens from the IncUan 

 Archipelago, where it was taken at ten places; furthermore it is known from 

 the Arabian Sea, the Bay of Bengal, the Indian Ocean Lat at. 3° 9' N., long. 

 84° 44' E., and the China Sea (the author). 



HEMISIRIELLA H. J. Hansen (1910). 

 14. Hemisiriella abbreviata, sp. nov. 



Plate 2, figs. 2a-2c. 



Butaritari, Gilbert Islands. Jan. 6, 1900. Lagoon. Surface. Light. 1 female with young. ".\1- 

 batross." 



Description. — Slender. — Carapace extremely short, leaving along the 

 middle line nearly more than three segments uncovered; the frontal plate (fig. 2a) 

 somewhat feebly produced, constituting a low triangle with the vertex acute. 

 Eyes moderately large, very light brownish; the stalks somewhat broader than 

 long and broader than the retina. The antennulae with the third peduncular 

 joint distinctly less than twice as long as broad. The antennal squama short, 

 about two and a half times as long as broad, with the terminal lobe beyond the 

 base of the marginal tooth twice as broad as long. 



Uropods (fig. 2b) with the endopod not overreaching the exopod, with five 

 marginal spines occupying only about one fifth of the outer margin of the proxi- 

 mal joint of the exopod, and the distal joint somewhat less than twice as long as 

 broad. Telson (figs. 2b and 2c) proportionately short, not reaching the articu- 

 lation of the exopod, distinctly less than twice as long as broad, with two pairs 

 of spines at the end of the broad proximal part, while its longer distal part is 

 linguiform, with the proximal third of its lateral margins con.spicuously conca\e 

 and the end broadly rounded; the lateral margins of a little less than tlie distal 

 half of the telson only with 4-5 spines irregular as to size and intcr\'als, while 

 the terminal margin has three extremely small spines in the interval between 

 three pairs of long spines, the inner pair of which are slightly shorter than 

 the most lateral pair, while the intermediate pair are considerably longer 

 than the others; terminal feathered setae not observed. 



Length of the single adult female 5.5 mm. 



Remarks. — This species is allied to H. pulchra H. J. H., but is smaller 

 with the eyes larger, the third joint of the anteunular peduncle shorter in pro- 

 portion to breadth, and the telson broader with a small number of lateral spines 

 and three pairs of long terminal spines. Though the elongate endopod of the 



