METAPENEUS ELEGANS. 131 



anteriorly by a short retrorse tooth, that is directed out- 

 ward aud obliquely truncate. 



Length of (probably not yet full-grown) male 81™"!.. 



5. Metapeneus sibogae, n. sp. 



Station 306. Lat. 8°27' S. ; long. 122°54'5 E. Depth 



247 M. 

 Station 312. Lat. 8°19'S.; long. 117°41' E. Saleh- 



bay, north coast of Sumbawa. Depth 274 M. 



Closely related to Metap. coniger W.-Mas. var. andama- 

 nensis W.-Mas. 



Body tomentose. Rostrum more slender than in the quoted 

 variety, in the male a little longer than the rest of the 

 carapace, in the female once and a half as long as it, 

 rarely quite straight, usually the distal half or third part 

 more or less curved upward. In addition to a small epi- 

 gastric tooth, the rostrum is armed with 8 or 9 small 

 teeth, all on the rostrum proper and becoming suialler and 

 further apart as they approach the extremity. No postros- 

 tral ridge. Abdomen as in the quoted variety, the 4^^ and 

 the 6th terga presenting even obscure traces of subcarinae ; 

 6tli somite twice as long as the h^^ and just as long as 

 the telson. 



Antennular peduncle a little longer than the carapace 

 without the rostrum ; as in Metap. coniger the longer fla- 

 gellum carries in the male a small tooth at one sixth of 

 its length from the base. 



Thoracic legs somewhat more slender than in Metap. 

 coniger., l^t pair bispinose, 2nd unispinose. 



Petasma at least half as long as the carapace without 

 the rostrum, asymmetrical, the right lobe distinctly longer 

 but narrower than the left, that is truncate; the right 

 often somewhat turned outward. 



Thelycum consisting of a quadrangular, white coloured 

 plate, a little broader than long and longitudinally grooved 

 in the middle; anteriorly this plate is truncate or slightly 



Notes from the Leyden IMuseaxii, Vol. XXIX. 



