I 24 



Length of rostrum. 

 „ „ carapace 



„ „ abdomen 



Entire len"th . . 



Table A. 

 Measurements in millimeters. 



9 

 42 



33 

 82 



157 



Rostral formula. . . 

 X° 1 — 8 ova-bearing females, N" 9 male, in which the rostrum is incomplete. 



Measurements in mi 



specimens 1 — 3 



Length of merus 

 „ „ carpus 



„ „ propodus 



„ „ dactylus 



Length of merus 

 „ » carpus 



ü propodus 

 „ „ dactylus 



Length of merus 

 » carpus 

 „ „ propodus 



„ „ dactylus 



Table B. 

 i nieters of the three poste rior 1 e g s in 



6 and 8 of the preceding Table. 



of 3'd leg 



of 4»h leg 



of 5A leg 



8 



55 

 40 

 16,5 



5 



53 

 46 



23 

 4.3 



49 

 48 

 30 

 3-8 



the 



Eggs very numerous and small. 



Geographical dist r ib u ti on : The typical Plesionika longipes (A. M.-Edw.) was 

 taken by the "Blake" off the island of Barbados, West-Indies, at a depth of 200 fathoms. 



Plesionika Ortmanni Dofl. PI. XI, Fig, 26, 26a. 



Plesionika ortmanni F. Dofiein, Ostasiatische Dekapoden, München 1902, p. 616, Taf. III, Fig. 2. 

 Plesionika ortmanni H. Balss, Ostasiatische Uecapoden II, München 1914, p. 30, Fig. 14. 



Stat. 15. March 15. 7°2'.6S., 11 5° 23.6 E. Bali Sea. 100 m. Bottom fine coralsand. 

 and 1 female. 



male 



The two specimens are of the same medium size and the female has no eggs. The 

 male is 52 mm. long from apex of rostrum to tip of telson, the rostrum being 17 mm. long, 

 the carapace 8,75 mm., the abdomen 26,25 mm.; in the female the rostrum is broken oft a 

 little behind the tip. The rostrum, which in the male is almost twice as long as the carapace, 

 is first slightly depressed to a little beyond the tip of the antennular peduncle and from here 

 obliquely turned upward, so that the apex is situated above the level of the carapace ; the 

 dorsal crest gradually commences nearly in the middle of the carapace, but the i st tooth is 



