14 



near one another just behind the middle of the upper border, besides the usual distal spine; 

 the spinules of the lower border are all small, except one that is a little larger, on the merus 

 of the left leg. The upper margin of the palm carries on the left leg 6, on the right 7 spines 

 except the small acute tooth at the distal end. The coxae of the 2 nd and 3 rd pair are armed, 

 on their anterior margin, only with one tooth. 



The largest of the other specimens is a male from Stat. 38, which measures 79 mm. 

 (carapace 35 mm., abdomen 44 mm.). The two rostral spines are separated until to the middle, 

 the sublateral carinae on the branchial regions carry 12 spines instead of 13. The acute, out- 

 wardly directed tooth on the frontal border of the eye-stalks is situated on the middle of this 

 border. The overhanging curved spine into which terminates the carina of the 3 rd abdominal 

 somite, is more than twice as long as that of the i st . The coxae of the 2 nd legs carry, instead 

 of one, two or three spines, of which the outer one is larger than the others. There is no 

 spine at the far end of the merus of these legs. The 5 th legs are subcheliform, the dactylus 

 being one and a half as long as the immobile finger. For the rest this specimen agrees with 

 the described female from Stat. 3 1 6. 



In a young female, long 55 mm., from the same Station the two rostral teeth are 

 coalesced until the middle and slightly directed outward. The acute tooth on the frontal border 

 of the eye-stalks is placed, like in the male, just in the middle of the border. The sublateral 

 ridge carries on the left branchial region 11 spines, on the right 12. The slender, curved spine 

 on the 3 rd tergum is almost 3-times as long as that of the i st . The upper border 

 of the merus of the i st pair of legs carries but one spine, somewhat behind the middle, besides 

 that at the distal end. The coxae of the 2 nd legs are armed again only with one spine and 

 the far end of their merus is unarmed. The legs of the 5 th pair resemble those of the male, 

 the dactylus being still distinctly longer than the immobile finger. 



The other specimens, males and females, are all younger than the last described female 

 and nearly 40 mm. long; they present the same characters. The sublateral carina on the branchial 

 regions carries usually 12, rarely 13 or 11, in one case even only 10 spines. These differences 

 are apparently all individual. 



The epipod of the external maxillipeds is a small papilla, about i 1 /, mm. long, while those 

 of the four thoracic legs are membranous expansions of the base of their podobranchs. 



Measurements in millimeters. 



Length of the body, measured in the middle line, rostral 

 teeth included 



Length of the carapace 



„ „ „ abdomen 



Distance between the tips of the spines at the antero-lateral 

 angles 



Greatest width in front of the cervical groove 



Length of the telson 



Width of . 



6 



9 



40 

 177, 



227, 



7 3 U 



8 



37, 



