8o 



of the 1^' pair. In the two largest females, respectively 146 and 140 mm. long, the rostrum 

 extends a little, 3 or 2 mm., beyond the ape.x of the antennal scale, but in the youngest 

 specimen it hardly reaches to the ape.K : in the fourth specimen the rostrum is broken off just 

 before the distal e.xtremity of the antennular peduncle. In the largest specimen the rostrum is 

 f-dentate; the first four teeth of the upjjer margin are closely planted together, 3 on the carapace, 

 the 4''' above the orbital margin, the 5''' is placed just before the eyes, the 6"> still a little 

 farther distant from the 5"^ as the 5"' from the ^'^ , the 7"' nearly in the middle of the rostrum 

 proper and much nearer to the 6''> than the 6"> to the 5"', the foremost tooth, finally, a litde 

 beyond the middle of the rostrum, almost as far from the 7''' as the 5"' from the 4"' and almost 

 as far distant from the tip of the rostrum as from the 5"> tooth. The single tooth of the lower 

 margin is about 3-times as far distant from the tip of the rostrum as from the foremost tooth 

 of the upper margin. In the second specimen, long 140 mm., the rostrum is V'-dentate, the 7 

 pro.\imal teeth are closely implanted, 4 on the carapace, the 5"' above the orbital margin, the 

 8^^ tooth just above the distal e.xtremity of 2°<i antennular article, the 9''' on the middle of the 

 rostrum proper, just before the far end of the antennular [jcduncle, the foremost tooth as far 

 from the 9"' as the 9"^ from the 8"'. The tooth on the lower margin twice as far from tip of 

 rostrum as from the foremost tooth of the upper. In the female with broken rostrum the 5 

 proximal teeth are closely set, 4 on the carapace, the 5'h just before the orbital margin, the 

 G"* just before the eyes and little farther distant from the 5"' as the 5"' from the 3^'^ , the 7''^ 

 opposite the middle of y^ antennular article and almost as far from the 6^^ as the 6"^ from 

 the 4"' , the last tooth just before the apex of antennular peduncle, near the place where the 

 rostrum is broken off. The rostrum of the youngest specimen is ^-dentate; 4 teeth, closely 

 planted together, on the carapace, the 5"> just before the orbital margin, the 6"> just in front 

 of the eyes and as far distant from the 5"' as the 5"^ from the ^'^ , the 7"^ at the far end of 

 2'"' antennular article, nearly as far from the 6* as the 6'^ from the 4"' , the 8"' at the far end 

 of the peduncle and as far from the 7"^ as the 6"'^ from the 5"', the foremost tooth, finally, 

 one and a half as far distant from the tip of the rostrum as from the penultimate. Lower tooth 

 3-times as far distant from the tip as from the foremost of the upper margin, before which it 

 is placed. The gastric carina is distinct, subacute and reaches to near the shallow transverse 

 depression that separates the gastric from the cardiac region ; like in Xemat. ensifer (S. I. 

 Smith) var. prodiuta Bate this depression is not united by a distinct sulcus with the lateral 

 oblique part of the cervical groove, defining the gastric region posteriorly and passing at its 

 lower end into a short transverse groove or dimple, which is much shorter than in that species. 

 Branchio-cardiac groove rather indistinct, orbital angle and post-antennular spine as in the variety 

 prodzicta Bate of A^emat. ensifer (S. I. Smith), branchiostegal spine a litde longer than the 

 other, directed obliquely forward and downward ; orbital furrow more or less distinct. 



Abdomen 3-times as long as the carapace without the rostrum, resembling that of the 

 vdineiy producta Bate, but the posterior border of the y^ tergum is less strongly and more 

 obtusely produced in the middle line. Sixth somite twice as long as s"", telson a trifle longer 

 than 6"^ somite, exclusive the terminal spines, and bearing 8 or 9 [jairs of dorso-lateral spinules, 

 including the pair of spinules near the tip. Outer uropod slightly shorter than the telson, 



