I. '08. 94 



Dorsally it is armed with from five to ten teeth, usually eight or 

 nine. The jXDsterior of these are rather close set and decrease in 

 size from before backwards ; they are situated on the basal 

 crest of the rostrum and several of them are on the carapace 

 proper, behind the orbital notch. The foremost two or three 

 teeth are more distantly spaced, but the anterior one is not set 

 further forward on the rostrum than the distal extremity of 

 the antennular peduncle ; from this point onwards to the apex 

 the rostrum is smooth and unarmed on its dorsal margin. 

 Ventrally it is furnished with a very closely set series of fine 

 forwardly directed teeth which extends almost to the apex ; 

 the proximal member of the series is situated immediately 

 above the ultimate joint of the antennular peduncle. The 

 ventral serrations are somewhat concealed proximally by the 

 thick fringe of setae which overlies them on each side, and 

 there are also a few fine cilia intersj^ersed between the dorsal 

 teeth. All the teeth, both dorsal and ventral, are fixed. The 

 rostrum is continued backwards as a carina which becomes 

 evanescent at about the middle of the carapace. Anteriorly 

 the carapace is provided with a sharp spine at the base of the 

 orbit and another below^ the insertion of the antennae ; a faint 

 carina marks the superior boundary of the branchial chamber. 



The abdominal somites are smooth and show no trace of 

 carination. The sixth somite is just twice the length of the 

 fifth. The telson is dorsally depressed and rather longer than 

 the last somite. It is shorter^ than the inner uropod and is 

 armed with three i^airs of terminal spines and a few pairs of 

 dorso-lateral spinules. 



The eijes are very large and the ocellus is not independent 

 of the cornea. The basal joint of the antennulai- peduncle is 

 much longer than the second and third combined ; its lateral 

 process is laminar, acutely pointed anteriorly, and reaches to 

 the distal end of the segment. The antenna! scale is more 

 than three-quarters of the length of the carapace ; it is convex 

 externally and is more than four times as long as wide ; the 

 small apical spine reaches slightly beyond the lamellar por- 

 tion. 



Senna states that the cutting edge of the mandihle bears six 

 teeth ; in a dissected specimen five teeth were found on 

 the right side and seven on the left. The outer lobe of the 

 first maxilla is apically rather more deeply sub-divided than 

 in the British species of Pandalus. The posterior lobe of the 

 cxopod of the second maxilla (fig. 2) is rounded, not pointed 

 as in Pandalus, nor truncate as in Pandalina. The third 

 maxillipedes, which bear long exopods reaching to almost 

 half the length of the ischium, extend beyond the a|)ices of 

 the antennal scales. 



1 In some of Challenger specimens the telson is equal in length to 

 the inner uropod. 



