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It is with some doubt that this specimen is referred to Sic. laevis, but the differences 

 between it and Bate's description are probably due to the difference of age. 



This female is 17,5 mm. long, the carapace, rostrum included, 7 mm. long, without it 

 5 mm. The carapace appears a little higher, at the level of the cardiac dorsal tooth, in 

 proportion to its length than in the figure of the Challenger Report : at the level of the orbital 

 margin the carapace is 5,3 mm. long, whereas it is 4,2 mm. high at the level of the posterior 

 dorsal tooth, in the figure, however, of the adult specimen in the Challenger Report the 

 proportion is as 3 : 2. The rostrum that reaches to the middle of the 2"^! joint of the anten- 

 nular peduncle, is slightly ascending and, as in the type, it narrows considerably from its base 

 to the tip: at the base, indeed, the rostrum is 0,85 mm. broad, at the tip 0,34 mm., the teeth 

 included, so that the rostrum appears to be more than twice as broad at the base 

 than at the tip. The upper margin carries 4 teeth, the i"> of which stands on the carapace, 

 immediately behind the anterior margin, just above which occurs the tip of the tooth; the distances 

 between these teeth that are rather low, slightly decrease forward, so that the distance between 

 the i^' and the 2°'^ is one-third longer than that between the 2"<i and the 3''^' and the foremost 

 tooth is placed a little nearer to the 3"! as the 3"' to the 2°^. Whereas the upper margin of 

 the first three teeth is straight, that of the 4'*^ is distinctly curved downward ; below the 4''' tooth 

 is lying the tip of the rostrum, the extremity of which unfortunately is broken off and just 

 below the tip is situated the acute tooth of the lower margin ; one observes between this tooth 

 and the tip of the rostrum a rounded prominence that bears a tuft of setae. The lateral crest 

 of the rostrum runs twice as far distant from the upper than from the lower margin. 



The two dorsal teeth of the carapace are larger than those of the rostrum itself, but 

 also rather low; the tip of the cardiac tooth is situated just behind, the tip of the gastric 

 tooth just before the middle of the carapace. 



The orbital angle is obtuse, whereas it is described by Spence Bate as produced to a point. 



The tooth on the i^' abdominal terguni is not yet so long as in Bate's specimen, that 

 was 30 mm. long, and the carina of the 2"^^ does not end in a tooth at all. The abdomen 

 seems to agree for the rest with the quoted figure in the Challenger Report; the pleura of 

 the 4''' somite carry a small tooth at their postero-inferior angle and another of the same size 

 just above it, these teeth are not spiniform, but the pleura of the s'l^ and of the 6'*^ somite 

 end in a spiniform tooth at their posterior angle. 



Eye-peduncles decidedly shorter than the rostrum and even shorter than the i*' joint of 

 the antennular peduncle; the outer margin of this joint ends in a strong tooth that reaches to 

 the middle of the 2"'^ joint and immediately behind this tooth there is a much smaller one. 

 The antennular peduncle reaches as far as the lamina of the antennal scales; this lamina is 

 truncate distally, the distal margin making a right angle with the inner border; the outer 

 margin of the scale is slightly concave and the terminal spine is slightly curved inward and 

 projects beyond the lamina. 



The abdominal sterna carry each a strong acute tooth in the middle. 



General distribution: North of New Guinea (Spence B.vte) ; Hawaiian Islands 

 (M. R.\thbun). 



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