124 Dr. T. Scott on new and rare 



now described, however, the structure of the elongated left 

 leo- differs from that of any of the others known to me in the 

 proportional lengths of the various joints and in the peculiar 

 armature of the terminal one. The mutilated condition of the 

 oidy specimen observed prevents a more detailed account 

 being given, but the characters available are, t;iken together, 

 sufficient to distinguish this form from its confreres. 



AmaUophorfi clavi'r/er *, sp. n. 

 (PI. 111. tigs. 1-11; PL IV. figs. 13-17.J 



Cephalothorax moderately elongated ; foreliead rounded ; 

 rostrum bifurcate, with moderately long tapering branches; 

 abdomen composed of five segments, caudal rami vey short. 

 Length about 47 mm. (PI. III. fig. 1). 



Antennules rather longer than the cephalothorax, mode- 

 rately slender and composed of twenty-five joints ; first and 

 second joints somewhat dilated, the next four small, subequal, 

 the sixth to the twelfth more or less coalescent, thirteenth and 

 fourteenth small, the fifteenth to the nineteenth rather longer 

 than the preceding two joints or those that follow, as in the 

 formula, which shows approximately the proportional lengths 

 ot the various joints : — 



Number of the joints 1 23 4 6G789 10 1112 



Proportional lengths of same . . 17 . 12 . 7 . 8 . 7 . 8 . 38 . 



1 3 14 15 16 17 18 19 20 2 1 22 23 24^5 

 9 . 9 . 14 . 15 . 16 . 15 . 16 . 12 . 9 . 8 . 11 . 11 . 6 ' 



See also the drawing (PI. III. fig. 3). 



Antennte small, inner branch much shorter than the outer 

 (PI. III. fig. 4). 



Mandibles small, narrow, elongated, distal end somewhat 

 constricted, biting end obliquely truncated and armed with 

 small denticles; mandible-palp small (PI. III. fig. 5; PI. IV. 

 fig. 13). 



Fir-it m;ixillif)ed small, furnished with a dense fascicle of 

 sensory filameiits and a number of sette as sliown in the 

 drawing (PI. III. fig. 6). Second maxillipeds also small, 

 elongated, and sj)aringly setiferous (PI. III. fig. 7). 



The four p;iirs oi swimniinu'-feet are somewhat similar to 

 those in XanthociJamis hurtalis, G. O. Sars. Tiie fifth pair 

 has also a general resemblance to those of the same species, 



* Claviger, carrying a club ; referring to the club-like form of the left 

 leg of fifth pair. 



