PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 443 
Some of the legs of these specimens give the following measure- 
ments: 
pr KS a 
3) = = 
= Leg. = i a 5 3 = 
g = re E - = 2 
tod Ca) ° > 5 2 a 
a = 4 a iS) Ay A 
mm. mm. mm mm. mm. mm. 
i | Silo Sec SS ee ee 17.0 4.2 3.8 GsShla 220 1.0 
1, | GH Gabo ode cee RR ei aan ean ees Rael 26.0 3.0| 10.0 4.7 5.3 3.0 
i) BRAT Gooeo 550 e Stee cae eee ee eee 24. 0 2.0 8.7 5.0| 5.5 1.9 
2) |: Bile one 5 RES SU es ee ee gy a ear ee 28. 0 3.0] 11.6 4.6 5.7 2.5 
2 | CRN 325. coe on eee eee ee ee ee eee ae 26.7 D055 | salle 4.6 5.7 2.3 
2B |B sete ARSE ae eae 2 a ane tales eae 25.2 2.5| 10.0 5.1 5.0 2.0 
MINA CIP LS): rate a ciclus saaaton acesecns 24.3 2.1 9.1 4.6 5.5 2.3 
% | Bit 50 een poe eee Te Ble eet 93.5] 2.0 8.2 5.4 5.7 1.5 
FP DAT ech Lege oes Se ee ee a 25.0] 6.5 5.5 HW os By 1a, 
| 
Stations 870, 871, 873, 877, 878, 880; 100 to 252 fathoms. Three females 
from 878, 142 fathoms, were carrying eggs. 
The genus Pandalus, as at present recognized, apparently contains 
species representing two or more genera, and the species just described 
is probably not strictly congenerie with P. Montagui, the type species. 
The equal, chelate legs and the slender, unarmed dactyli of the third, 
fourth, and fifth pairs of legs separate P. tenwipes widely from Montagui. 
The oral appendages afford some characters not indicated in the above de- 
scription. In P. tenwipes the proximal segment of the mandibular palpus 
is dilated, though not quite as conspicuously asin P. Montagui ; the pos- 
terior lobe of the scaphognath of the second maxilla is very short, broad, 
obtusely rounded at the extremity, and projects very little back of the 
base of the endognath, while in P. Montagui and the allied species it is 
very much prolonged and acutely triangular posteriorly; in the second 
maxilliped the dactylus is about as long as broad and articulated with 
the oblique distal end of the propodus, while in P. Montagui and its al- 
lies the dactylus is a narrow plate, articulated by one edge to the distal 
part of the mesial edge of the propodus. 
The branchi of P. tenuipes are the same in number and arranged in 
the same way as in P. Montagui and P. borealis ; that is, there are twelve 
branchiz plus seven epipods on each side; or, stated in full, the branchial 
formula is: 
; 
Sonnit Podo- | Arthro- | Pleuro- 
WETTER branchiz. branchie. branchie.| 
| | 
Disla lee a eo Soin an icasiecic oda caelsnsisieijaiaein-'s 0 (ep.) 0 0 |=0 (ep.) 
Paley ele eee. eS: 2 LENS zion dalideecseaseer==- 1 (+ ep.) 0 | 0 |=1(+ ep.) 
TDR hee oe 5S Eee Sanne BBE ODED seeseopereaccccacdmEcsar 0 (ep 2 0 |=2 (+ ep.) 
Oe PRE A eae 2 SO Cee sg See ee eS a Set toe 0 (ep.) ey 1 |=2 (+ ep.) 
ep NN RN nt Saaghisaneaceeiaeas 0 (ep.) 1 1 |=2 (--ep:) 
SNATiTe epee tae ee aE SP OLE SEEDS L os icekelesanninninte=- =e 0 (ep.) 1 1 |=2(+ ep.) 
GTi Leman en nN . Soecmemelenee eee sieeiar= 0 (ep.) 1 lea 1) |= 2i(-F eps) 
DOSE ERR AEE MEER e a Bnet kIT ES ol the eted 0 | ea 
1+7 ep 6 5 |=12+7 ep 
