PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 437 
Hippolyte securifrons Norman. 
Stations 89 i and 880; 225 and 252 fathoms; three large females, 
The branchial formula of this species, written essentially after Hux- 
ley’s method, is: 
Sinton: Podo- | Arthro- Pleuro- 
branchie. | branchie. | branchie. | 
WI). 2. sea SU Saar HOSSC BEES ae eae eee a 0 (ep.) 0 0 =0 (e 
ee 226 ghcoethe DSSS thd ey ate OER oBaa Mae eS Hers ae 1 (+ep.) 0 0 = aes ) 
|S EEE SE 5 a a eee 0 (ep.) 0 0 | =0 (ep:) 
Pememeeniieal we O(ep.) | 0 1 | =1 (+ ep.) 
at Poe 22 S10 Ne. e222 ooo SBOE es Bee Ser Sa Saee Sa oe 0 (ep.) | 0 L | =1 (+ ep.) 
nme A kl 0 (ep.) 0 1 | =1 (+ ep.) 
Bm iia a ee ee ee ew eee esas 0 1 8 
22 VW lls coc cect dt SSS BO RS SCTE ECE eae eee eat ea 0 0 1 — 
1+6 ep. 0 5 6 + 6ep 
Bythocaris sp. 
Stations 865 to 867, 872, 874, 878; 64 to 142 fathoms. 
Pandalus propinquus G. O. Sars, Christiania Videnskabs-Selskabs Forhandlinger, 
1869, p. 148 (4); ibid., 1871, p. 259 (16). 
Stations 878, 879, 880, 893, 894, 875; 142 to 365 fathoms. The largest 
specimen is a female, over 110°" in length. 
This species was dredged in 1879 in the Gulf of Maine, off Cape Cod, 
station 305, N. lat. 42° 9/ 30’, W. long. 69° 41’, 118 fathoms, soft mud; 
and station 343, N. lat. 42° 17’, W. long. 69° 51’, 116 fathoms, mud. A 
male, 74" long, from station 305, has the chelate second pair of legs 
reversed, the short one being on the left and the long one on the right! 
The legs themselves are of the normal size and structure, and the speci- 
men appears to be perfectly normal in all other respects. 
As far as I am aware, the species has heretofore been recorded only 
from deep water off the coast of Norway. 
Pandalus leptocerus, sp. nov. 
In size and general appearance much like P. Montagui (annulicornis), 
but more slender and readily distinguished from it, and from P. propin- 
quus and borealis as well, by the minutely roughened surface and the 
presence of exopods upon the external maxillipeds. 
The rostrum is from about once and a third to nearly twice as long as 
the rest of the carapax, and curved very slightly upward, but usually 
not as much so as in P. Montagui. Above, it is armed with eleven to 
thirteen teeth, of which one is near the tip, as in P. Montagu, and 
usually only two back of the orbit on the carapax proper, while a con- 
siderable space back of the terminal spine is unarmed, though this space 
is usually shorter than in P. Montagui. Beneath, there are 6 to 8 teeth, 
asin P. Montagui. The entire surface of the carapax and abdomen is 
slightly roughened with short and irregular, transverse, punctate ridges, 
which give rise to very short, bristle-like hairs, while in P. Montagui, 
propinquus and borealis the surface is naked and very smooth. The 
