SlMORHYNCHOTUS StEBBINGI. 51 



The femur of the first and second pairs of perœopoda is 

 much longer than all the following joints together. The 

 femur of the seventh pair is about as long as three-fourths of 

 that of the sixth, and is as broad as the femur of the fifth pair. 



The peduncle of the first pair of uropoia is shorter than the 

 inner ramus, but a little longer than the outer. The outer 

 ramus of the second pair is much shorter than the peduncle. 

 The outer ramus of the last pair is more than half as long as 

 the inner, and styliform. 



The telxon is as long as broad, and acute at the apex. 



Syn. Simorlijnchotus aiiteniinrius, Th. Stebbinc. 39, p. 1572. 



As Sinior/n/nchotus antennariu,H.i Stebbing, is, in my opinion, speci- 

 fically distinct from 5. aiiiennarhis, Claus, I have proposed here a nevv^ 

 name for the former. I have done so without any hesitation because I 

 have mj'self taken and examined specimens of both, and I have thus been 

 able to complete in respect to some minor details the description given by 

 Stebbing from a single and somewhat damaged specimenr 



The upper surface of the head is somewhat deeper than the dorsal 

 line of the pereeon. Seen from below the under side of the rostral por- 

 tion is strongly concave, and much narrower than a third of the head. 



The lower hind corner of the first flagellar joint of the first pair 

 of antenna' is produced downwards, but does not reach to the under 

 margin of the second flagellar joint. The third flagellar joint is much 

 shorter than the second; the fourth joint is fully as long as the two 

 preceding together. 



The fifth pfi.rœonal segment is longer than the sixth; the seventh 

 is as long as the sixth. 



The metacarpus of the first pair of 2?é'r"ceo/)or:?a is shorter than the 

 carpus; the dactylus is a third part as long as the metacarpus. The 

 carpus of the second pair is not twice as long as it is broad at the 

 lower end; the free part of the under margin is more than half as long 

 as the hind margin of the metacarpus; the lower hind corner is angular; the 

 dactylus is a third part as long as the metacarpus. The fifth pair are 

 as long as the perteon and the first two pleonal segments together; the 

 femur is twice as long as broad, much shorter than the three following- 

 joints together, and only a little longer than the metacarpus. The femur of 

 the sixth pair is a third part longer than broad, irregularly pear-shaped, 



