344 "ENDEAVOUR" SCIENTIFIC RESULTS. 



reach about as far forward as the third maxillipeds ; the 

 fifth legs are wanting, or broken. A further discrepancy 

 in Haswell's description is also to be noted. He has it 

 that the "under surfaces of the second and third pairs 

 [of legs are] devoid of spines." This is true with respect 

 to the third pair of legs, but the second pair in all of 

 the specimens before me, as well as in the holotype, has 

 the basis spined as in the first pair of legs, which in 

 addition has the ischial joint spined as well. 



As in the females, there is no indication of a carina 

 on the first abdominal somite; that on the second is 

 hardly more than a narrow, smooth, median area, 

 scarcely raised above the general surface of the dorsum; 

 just before the middle, the carina shows a small incon- 

 spicuous punctation. On the third somite, the carina 

 is more prominent, dorsally flattened and without any 

 noticeable trace of a groove; the carinse on the fourth, 

 fifth and sixth somites are narrow and prominent. The 

 sixth somite is very slightly more than twice as long 

 as the fifth and subequal to the telson, which falls 

 scarcely little more than a seventh of its length short 

 of the tip of the inner branch of the uropod. 



The petasma is in very close agreement with the one 

 figured by Alcock for P. stridulans, for though the outer 

 "lobule" of the left lobe lacks the so-called "crown 

 of stiffish filaments," these are suggested by very slight 

 crenulations of the tip of the "lobule." 



PALMENSIS." 

 (Plate Ixi., fig. 1.) 



The small female specimen which has been critically 

 compared witli the holotype of palmensis is certainly a 

 small Penceopsis novcc-guinew, as McCulloch supposed. 



The tip of the rostrum attains the distal margin 

 of the second segment of the antennular peduncle, and, 

 counting the epigastric, carries ten teeth of which all 

 but the epigastric are before the posterior orbital 

 margin. The antennular peduncle reaches as far forward 

 as the antennal scale. There is an obscure post-ocular 

 tooth, and the antero-lateral angle of the carapace is 

 dentiform. The stridulating organ has from 13 to 14 

 ridges. The third maxillipeds reach forward nine-tenths 

 of the length of the antennal scale, the extremity of 



