PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 417 
branchial regions are prominent, tuberculose, and pitted, particularly 
upon the outer surface, and rise at the summit into a prominent spini- 
form tubercle either side, on a line with the anterior cardiac tubercle. 
The chelipeds are very nearly as in L. Pourtalesii, but appear to be pro- 
portionally a little longer, and, judging from A. Milne-Edwards’s figure 
of Pourtalesii, to have the marginal teeth more acute and more dveply 
Jaciniated. The meri of all the ambulatory legs are spinulose on both 
_ the upper and lower edges, as in Pourtalesii, while in the last pair there 
are, in addition, similar spines on the upper edge of the carpus and one 
near the middle of the upper edge of the propodus. The dactyli are 
about as long as the corresponding propodi, are very slightly com- 
pressed, and are covered with a dense veivet-like pubescence, except at 
the tips. 
Measurements. 
ee ? [eee 
(Sta. 865-7.) (Sta. 872.) | (Sta. 872.) 
mn | mm. mm. 
Papo MCAT ApH eer yss sence. ot8l bl. le Sle k ec cmelces ace cteedee 24.0 | 26.5 82.8 
readin melding lateral Spines,......2s.2-cossc.-ss+ see. scecens 2.0 30. 0 41.0) 
iRatiolof lencth to breadth =. -:..---.-...s-.s6 SSE ear irate Bape olde 1) 745) 
Breadth excluding lateral spines ........----....-.-: Loe adc ase 26.0 | 28.0 BRB: 
Heneth of cheliped fully extended ..-...----.----------------55- 57.0 65. 0 85. 0 
ManoihcommMcrusOn Cheliped sence n6 22s secre ascseneee cee oe 0. 0 | 25. 5 32.0 
PRSHAtH, Gueplropondus Ot CHeMpedis- 2 cc... caecce Sainnanin wee scene 27.0 30. 0 39. 0 
The conspicuous cervical emargination of the antero-lateral margin of 
the carapax, the cervical depression above the margin, the different 
antero-lateral margin in front of the cervical suture, and the spines or 
tubercles on the carpi and propodi of the last ambulatory legs appear 
clearly to distinguish this species from the Pourtalesti. The antero- 
lateral margin between the cervical suture and orbit appears to be more 
like ZL. hyponcus, as figured by A. Milne-Edwards, though in other re- 
spects the hyponcus is unlike the present species. 
Stations 865 to 867, 872; 65 and 86 fathoms; three specimens, all 
females. 
Cancer borealis Stimpson.—Smith, Trans. Conn. Acad., v, p. 39, pl. 8, 1879. 
Stations 865, 871, 872, 875, 877, 878, 879; 65 to 225 fathoms. Most of 
the specimens are small, and the largest is only 56¢™ in breadth of 
carapax. 
Large specimens of this species were taken in abundance in the shal- 
low waters otf Newport. 
' Geryon quinquedens Smith, Trans. Conn. Acad., v, p. 35, pl. 9, fies. 1, 2, 1879. 
Stations 881, 893; 252 and 372 fathoms. 
This species grows to a much greater size than any of the specimens 
from which my original deseziption was drawn. A male from 2:0 fath- 
oms, off Nova Scotia, north latitude 42° 37’, west longitude 62° 55’, 
_presented to the National Museum by Capt. G. A. Jolinson and crew of 
Proc. Nat. Mus. 80 27 Jan. 10, I8Si. 
