On a new “ Bipolar” Schizopod. 371 
in the posterior palate: in 7. Aapplerd it is deeply hollowed 
out, and its edges rise up as sharp bony ridges some 4-5 
millim. higher than its general level; in 7. pastas, on the 
other hand, the ridges are but little developed, barely 2 millim. 
high in one specimen, and less than that in the other. 
Finally, at the posterior end of the palatal ridges the lateral 
walls of the choane are hollow and considerably inflated, 
while in 7. pastase there is no inflation whatever and the 
bones appear to be fairly solid. 
Dimensions of the type (measured in the dry condition) :— 
Length of carapace, from nape to middle line above tail 
(movable bands contracted), 358 millim.; length of shoulder- 
suield in middle line 117, of pelvic ditto 162; length of 
middle bands over their curve across the back 444; length of 
tail (approximate) 400. 
Skull: extreme length in middle line 126; basal length 
103-5; greatest breadth 50; nasals 44:3; breadth of muzzle 
anteriorly 12°6; interorbital breadth 26°5; palate length 88. 
fab, Sarayacu, Upper Pastasa River, Oriente of Ecuador. 
Type. B.M. no. 80. 5. 6.71. Collected by Mr. Clarence 
Buckley. One skin and two skulls examined. 
This species is the 7. Kapplerd of my paper on Buckley’s 
Mammals (7. c.), but owing to the fact that the second skull 
was wrongly assigned to askin which afterwards proved to be 
T. novemeinctus, 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 Heuadorean animal differs so much from the typical 
Surinam Z. Kappleri that it should unquestionably be 
separated specifically. 
XLVIII.—On a new “ Bipolar” Schizopod. 
By AXEL OHLIN, Ph.D., University of Lund. 
WHEN examining the Decapoda and Schizopoda collected 
during the last Swedish Arctic Expeditions to Spitzbergen and 
East Greenland in the years 1898, 1899, and 1900, I found, 
to my great surprise, amongst a number ot that magnificent 
deep-sea Mysidan Boreomysis 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 
crozetit, Willemoes Suhm, MS., described and figured by 
Sars in his report on the ‘Challenger’ Schizopoda. My 
specimens—five in number, four of which are males—were 
