FAXON: NOTES ON THE CRUSTACEA. 157 
the shell is less coarsely granulated, but more spiny in the former species than 
in the latter; the two lines on the proximal half of the rostrum in both species, 
widely diverging as they pass backward over the gastric area, are marked by 
small tubercles in N. aculeata, by distinct acute spines in N. agassizii ; the 
top of the small median tubercle on the gastric area is truncated in N. acu- 
kata, while in N. ag«ssimó it is bluntly triangular, passing into a slight 
median longitudinal carina both in front and behind ; the abdominal pleure 
are produced into longer spines in N. agassizii than in N. aculeata, and the 
spines moreover trend more distinetly backward, forming a stronger angle with 
the vertical axis of the pleura; the outer surfaces of these pleure are quite 
smooth in N. agassizii, while in N. aculeata they are conspicuously granulated 
both on their margins and on the distinctly raised central field ; the lateral 
borders of the abdominal terga, which form a festoon on each side of the ab- 
domen, are more strongly convex in the former species; another distinction is 
apparent in the sixth abdominal somite, viz. in N. aculeata the antero-lateral 
margin of the pleura is shorter than the postero-lateral border, whereas in the 
other species the antero-lateral border is longer than the postero-lateral; the 
tergum of this somite in N. aculeata sends off a granulated ridge from near its 
posterior lateral angles, — a ridge which runs forward into the upper, depressed 
portion of the pleura ; this ridge is not found im N. agassizii. 
Nephropsis rosea Bate is without much doubt a young individual of N. acu- 
lata. N. atlantica Norman! is very similar to V. agassizii, but has a sharp 
spine on the anterior margin of the second abdominal pleura. 
Stenopus hispidus (Ov.). 
Station 11. 37 fathoms. 1 specimen. 
" DECUS m l 7 
1 36. 84 = 1 ge 
= 132. 115 sy 2 t 
Pontophilus gracilis Smits. 
Station 43. 339 fathoms. I specimen. 
MC AAT BR cree th: acoge got 
F E tks 
eal, ee join 
Prionocrangon pectinata, sp. nov. 
Plate II. Figs. 4-7. 
Rostrum spiniform, inelined at an angle of 45? to the axis of the body. 
Median dorsal line of the carapace armed with a row of eight spiniform teeth, 
Proc Roy. Soc. Edinburgh for 1881-82, p. 684; Wood-Mason and Alcock, 
Ann. Mag. Nat. Hist., 6th Series, Vol. VII. p. 197, Fig. 4, 1891. 
