150 Z OOLOGISCHE MEDEDEELINGEN — DEEL IL 



groove and the orbital margin curving downward to near the corneae of 

 the eyestalks, when stretched forward, and then running horizontally or 

 slightly ascending to the tip; descending part of the upper margin with 

 6 small teeth, of which the 4th i s placed immediately in front of the 

 orbital margin, terminal horizontal part of the rostrum unarmed ; the 

 lower margin of the rostrum that forms a sort of hood over the eyestalks, 

 carries one minute tooth between the extremity of the rostrum and the 

 anterior tooth of the upper margin. 



Cervical groove conspicuous, its lower end passing by a 

 semicircular curve into the orbital groove, that proceeds from the orbital 

 margin backwards and downwards. Outer canthus of the orbits rectangular, 

 no post-antennular spine, post-antennal spine salient, flanked by a carina 

 that runs to the hepatic groove. Hepatic groove angular; from the angle 

 a strong ridge runs horizontally backwards to near the posterior margin 

 of the carapace, at the level of the antennal carina. Abdomen as in Acanth. 

 Batei Faxon, but the telson almost l'/^-times as long as 6th somite and 

 nearly as long as the exopodite of the caudal fan. 



Corneae small, reddish brown, somewhat less broad than the eyestalks, 

 that show a prominent obtuse carina at the inner side, just behind 

 the corneae. 



Oral appendages as in Acanthephyra. 



Chela of 1st pair of legs ^3 longer than carpus, the latter a little 

 more than half as long as the merus. Carpus of 2nd pair l j l0 shorter 

 than merus, slender, chela ' l / 7 shorter than the carpus, fingers almost l \ z 

 the length of the chela. Carpus of 3rd r 4th pair a little more than '/ 3 

 the merus, propodus 2 7 3 -times as long as the carpus, slender, 20-times 

 as long as wide, dactylus ! / 3 of the propodus. 



Legs of the last pair nearly like those of the 4th, but the dactylus 

 rudimentary, hidden by a plume of setae. 



Length 64 mm. from tip of rostrum to extremity of telson. 



Acanthepthyra media Sp. Bate, var. obliquirostris n. 



Stat. 148. August 20. 0° 17'.6 S., 129° 14'.5 E. Halmaheira Sea. 1855 m. 

 Bottom fine, grey and green mud. 1 male. 



This specimen differs by the rostrum that almost reaches to the extre- 

 mity of the antennal scales, in stead of reaching beyond it, by the 

 proximal part of the rostral crest presenting only six teeth, in stead of 

 nine or ten, and by the rostrum being obliquely directed upward: it is 

 therefore regarded as a variety. 



Length 95 mm. from apex of rostrum to end of telson. 



