38 BULLETIN OF THE 



Since the above description was written a specimen of this species has been 

 taken in 458 fathoms, by the U. S. Fish Commission, Station 1029, off Mar- 

 tha's Vineyard. This specimen, an adult male 28 mm. long, agrees perfectly 

 with the female except in the usual sexual characters, and proves beyond 

 question that the specimens are adult, though the female is probably not fully 

 grown. The eyes in the male are fully as large as in the female. The inner 

 flagellum of the antennula reaches nearly half its length by the antennal scale, 

 while the outer is only a little shorter than the inner, but very stout, fusiform, 

 with the diameter at the thickest point equalling nearly half the breadth of the 

 antennal scale. The inner lamella in the first pair of abdominal appendages 

 (PL VII. fig. 3) is only half as long and less than half as broad as the outer, 

 and almost entirely naked. In the second pair (fig. 3") the inner lamella is 

 nearly as long as the outer, but only about two thirds as broad, lanceolate in 

 outline, furnished with plumose marginal setae like the outer, and bears the 

 two stylets characteristic of the male at about a fourth of the way from the 

 base to the tip of the inner margin. The marginal or major stylet is like the 

 single stylet of the female and of the succeeding appendages of the male, about 

 two fifths as long as the lamella itself, very narrow, and almost entirely naked 

 except the usual hooklike setse near the tip, while the minor stylet is a little 

 stouter than the other, but only about a fourth as long as the lamella, and naked 

 except a few minute hairs near the tip. 



Sabinea princeps, sp. nov. 



Plate VIII. Figs. l-l b . 



Carapax with seven carinas as in the other species of the genus, but with an 

 acute rostrum as long as the antennal scales or longer, and armed above with 

 a spine either side near the base and below with a single spine. The dorsal 

 carina is very high, sharp, slightly arched longitudinally, and armed, from a 

 little back of the orbit to the posterior margin, with seven or eight somewhat 

 irregular teeth directed forward. Tha rostrum varies very much in length, in 

 the male being often only a little shorter than the length of the carapax from 

 the orbit to the middle of the posterior margin, but in large females often only 

 half as long ; dorsally it is flattened and the margins slightly carinated, but 

 beneath the edge is angular ; the basal portion is nearly horizontal, but the 

 terminal portion is upturned and acute ; below the margin is armed with a 

 slender spiniform tooth directed forward from the point where the terminal 

 portion is upturned, and above with a similar tooth arising from the dorsal 

 margin over either eye and directed outward and upward. The three carinas 

 each side of the carapax have about the same position as in the other species of 

 the genus. The subdorsal is continuous almost to the orbit, and is armed with 

 six or seven spiniform teeth directed forward. The next carina below is 

 broadly interrupted on the anterior region, but back of this is armed with five 

 or six teeth like those of the subdorsal carina, and in front, at the outer margin 



