190 STALK-EYED CRUSTACEA. 



fifth, but shorter than the telson, which is narrow, triangular, grooved 

 above, and armed with one pair of lateral spines about quarter way from 

 the tip. 



The eye-stalks are about one half the length of the rostrum, and are 

 furnished with a small tubercle on the inner side ; the eyes are large, black, 

 much broader than their stalks. Antennules longer than the carapace. 

 Antenna3 as long as the body ; scale narrow, margined within with long cilia ; 

 a small spine on the outer side of peduncle at the base of the scale. The 

 following pairs of appendages have the form characteristic of the genus. 



In the female there is a large process, covered with stiff hairs, and 

 flattened on its inner side, developed from the base of the third pair of legs. 

 Behind this process lies a pair of flattened, setiferous, sternal processes. 

 Between the legs of the fourth pair there hangs in the median line a nearly 

 vertical curtain-like partition, notched on the free lower margin, and Hanked 

 by two lower, blunt, setiferous tubercles. The sternum of the posterior 

 thoracic segment has a slightly elevated median longitudinal ridge, and 

 a low transverse ridge at the posterior boundary of the segment. The form 

 of the petasma of the male is best understood by inspection of Figure 1'' on 

 Plate XLVIII. 



Length of a female specimen, 81 mm. ; carapace, 31 mm. ; rostrum, 

 8 mm. 



1-fem 



1 " 



2 " 

 2 " 



1 male. 



2 fern. 

 1 " 

 1 male, 2 fem. 



This species is apparently very similar to //. ki'via Bate, but the eye of 

 the latter species is much smaller, the areolation of the carapace difi"erent in 

 some regards, and, if Bate's figure * can be relied on, the telson is much 

 shorter. The two dorsal spines of the gastric region are situated much 

 further forward in 77. Imiis than in H. ncreiis. 



In Bate's description of the genus IlaUponis in the "Challenger" Re- 

 port (p. 284), the legs are said to be devoid of exopods, but on page 287 



* Rep. Challeiiger Macruia, Plate XLII. Fig. 2, 1888. 



