376 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [32] 



the tip, rounded and slightly sulcated above, armed with five to twelve 

 pairs of stout dorsal aculei on the distal half, aud with a median 

 spine at the tip. The outer lamella of the uropod scarcely reaches, or 

 falls much short of, the tip of the telson, is about four times as long as 

 broad, tapers very slightly except near the tip, which is ovate aud pro- 

 jects nearly the width of the lamella beyond the angle in which the 

 thickened outer margin ends ; the inner lamella is obtusely lanceolate, 

 and considerably shorter and a little narrower than the outer. 



The outer ramus of the first pleopod is long and slender like that of 

 the succeeding pairs. The inner ramus in the male is developed into a 

 broad oval lamella about a fourth as long as the outer ramus, setigerous 

 on the middle of either edge, and the inner edge thickened and bearing 

 a stylet armed along its inner edge as usual with minute hooks. In the 

 female the inner ramus is no longer than in the male, aud is narrow, 

 lanceolate, and thickly setigerous. 



In alcoholic specimens the eggs are about 0.45™"" and 0.32""™ in longer 

 and shorter diameter. 



Measurements of a large male are given under the next species. 



ACANTHEPHYRA EXIMEA, Sp. nOV. 



This species, which is represented in the collection by a single male 

 (5644) is closely allied to the last, but is apparently a larger species, and 

 is readily distinguished by the sharply carinated carapax and the much 

 stouter base of the rostrum. 



The carapax is higher in front than in the last species, and there is a 

 sharp carina extending from the rostrum to near the posterior margin, 

 rising into a slight crest on the cardiac region. The rostrum is shorter 

 than the rest of the carapax, very stout and high at the base, tapered 

 rapidly to about the middle, and from this point slender and slightly 

 upturned. The dorsal edge is distally unarmed for about half the length, 

 but back of this there is a series of about seven small teeth extending a 

 little way back upon the carapax, while beneath there are four teeth on 

 the middle and distal part. 



The eyes, antennulge, and antennae are nearly as In the last species, 

 except that the antennal scales are somewhat broader, and less slender 

 at the tips. The oral appendages are essentially as in the last species, 

 although the crowns of the mandibles are somewhat different, the teeth 

 of the ventral edges being nearly uniform in size and confined to the 

 mesial edge. The second gnathopods and the peraeopods are propor- 

 tionally a little stouter than in the last species, but appear not to differ 

 in other respects. 



The dorsum of the pereon is carinated and toothed nearly as in the 

 last species, but the carina is slightly higher and the tooth of the third 

 somite stouter. The pleuron of the fifth somite is proportionally longer 

 and reaches nearly to the infero-posterior angle of the sixth somite, 

 which, however, is considerably shorter aud higher than in the lastspe- 



