330 "ENDEAVOUR" SCIENTIFIC RESULTS. 



The only portion of the dorsum of the second 

 abdominal somite of P. endeavour} which is not pubes- 

 cent is a smooth and often rather narrow hastate area; 

 this is perhaps the trace of an anterior extension of the 

 prominent carina of the fourth, fifth and sixth somites, 

 which also is apparently indicated along the median line 

 of the dorsum of the third by a longitudinal non- 

 pubescent area. In P. intermedium on the other hand the 

 dorsum of the second abdominal somite is smooth and 

 shining, except for two narrow transverse lines of 

 pubescence, of which the posterior is indicated, laterally 

 only being incomplete for quite a wide interval over the 

 middle of the back ; the smooth dorsum of the third 

 somite extends on to the epimera, being interrupted 

 laterally by only a few small pubescent patches on each 

 side; the fourth somite is carinated only in its posterior 

 half, while the fifth and sixth are much as in 

 P. endeavour!. The carina of the sixth somite ends 

 posteriorly in a tooth in both species. 



The rostrum is distinctly ascending and extends as 

 far as, or slightly beyond, the distal border of the second 

 joint of the antennular peduncle, which in turn is as 

 much exceeded by the spine of the antennal scale. Only 

 in one specimen, a large female of 175 mm. in length, 

 does it equal the peduncle in length. The rostrum is 

 armed with ten to twelve teeth above ; eleven are present 

 in ten of the fourteen specimens. The post-rostral carina 

 is distinct almost to the posterior margin of the carapace. 



The third maxillipeds and the first legs both reach 

 about as far forward as the end of the antenual peduncle, 

 and the second legs exceed that point by the length of 

 the hand. The third legs and fifth legs seem to be 

 variable in length. In the figured female holotype the 

 former reach to about the end of the spine of the antennal 

 scale, as do also those of a male specimen taken with the 

 holotype; in another male specimen from the same 

 source the third legs reach to, or slightly exceed the tips 

 of the scale. In another male specimen the fifth legs 

 extend along five-sevenths of the length of the scale, 

 while in the holotype they reach to about the middle of 

 the scale. In another female in Avhich they might have 

 been lost and later regenerated, though there is no 

 evidence that this is the case, they extend only to the end 

 of the first third of the scale. The first legs are 

 bispinose beneath, the second and third pairs unispiuose. 



