On a new " Jh'polar^^ Schhopod. 371 



in tlie posterior palate: in 7'. A'a/ijfhri it is ck-cply hollowed 

 out, and its e(lj:;t'3 ri^^c up as sharp bony ridges some 4-5 

 millini. hi<;lier than its general level; in 2\ pastas(i\ on the 

 otlier hand, the ridges are but little developed, barely 2 niilliin. 

 high in one specimen, and less than that in the other. 

 Finally, at the posterior end of the j)alatal ridges the lateral 

 walls ot' the choanal are hollow and considerably inflated, 

 Avhile in 7'. pdstasif there is no inflation whatever and the 

 boiH-s a 1 1] tear to be fairly solid. 



Dimensions of the type (measured in the dry condition) : — 



Length of carapace, irom nape to middle line above tail 

 (movable bands contracted), 358millim. ; length of shoulder- 

 shield in middle line 117, of pelvic ditto 162; length of 

 middle bands over their curve across the back 4-44 ; length of 

 tail (approximate) 400. 



►Skull: extreme length in middle line 12G; basal length 

 103'5 ; greatest breadtli 50 ; nasals 44*3 ; breadth of muzzle 

 anteriorly 12-6 ; interorbital breadth 26*5 ; palate length 88. 



Hub. Sarayacu, U|)|km- Pastasa River, Oriente of Ecuador. 



Tiipe. B.M. no. 80. 5. (J. 71. Collect 'd by Mr. Clarence 

 ]?uckley. One skin and two skulls examined. 



This species is the 7\ Kapphri of my paper on Buckley's 

 Mammals (/. c), but owing to the fact that the second skull 

 was wrongly assigned to a skin which afterwards proved to be 

 T. novemcinctus, that skin was thought to be the same form, 

 and the characters therefore considered to be variable. 



With this mistake corrected, a renewed examination shows 

 that the Eeuadorean animal difTers so much from the typical 

 Surinam T. Kappleri that it should unquestionably be 

 separated specifically. 



XLVIII. — On a neio " Jilpolar^^ Schizopod. 

 By Axel Oulin, Ph.D., University of Lund. 



When examining the Decapoda and Schizopoda collected 

 during the last Swedish Arctic Expeditions to S[)itzbergen and 

 East Greenland in the years 18'J8, 18i»9, and 1900, 1 found, 

 to my great surprise, amongst a number of that magniflcent 

 deep-sea Mysidan Boreomi/sis scyphops, G. O. Sars, also one 

 of the few "bipolar" animals, a nearly related form, which I 

 must after a careful examination, identify with Amblyops 

 crozJt'ii, Willemoes Suhm, MS., described aiid figured by 

 Sars in his report on the ' Challenger ' Schizopoda. My 

 specimens — live in number, four of which are males — were 



