124 



Length of rostrum. 

 „ „ carapace 



„ „ abdomen 



Entire length . . 



Table A. 



Measurements in mi 



I m e ters. 



9 



42 



33 

 82 



«57 



Rostral formula. . . 

 N" I — 8 ova-bearino; females, X" 9 male, in which the rostrum is incomplete. 



Table B. 



Measurements in millimeters of the three posterior les^s in the 

 specimens i — 3, 6 and 8 of the ]j receding Table. 



Length of nierus 

 „ V carpus 



, „ propodus 



, „ dactylus 



Length of merus 

 „ „ carpus 



„ „ propodus 



, „ dactylus 



Length of merus 

 „ , carpus 



„ „ propodus 



, „ dactylus 



of 3'J lesj 



of 4'li leg 



of 5''> leg 



8 

 55 

 40 

 16,5 



5 



53 

 46 



23 

 4,3 



49 



48 



30 

 3,8 



Eggs very numerous and small. 



Geographical distribution: 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. 



3. Plesio7iika Ortnianni Dofl. PI. XI, Fig. 26, 16a. 



Plesionika ortnianni F. Doflein, Ostasiatische Dekapoden, Miinchen 1902, p. 616, Taf. IH, Fig. 2. 

 Plesionika ortnianni M. 15alss, Ostasiatische Uecapoden II, Aliinchcn 1914, p. 30, Fig. 14. 



Stat. 15. March 15. 7° 2.6 5., 1 15° 23.6 E. Bali Sea. 100 m. Bottom line coralsand. i male 

 and I female. 



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 nim. ; in the female the rostrum is broken off 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 ape.\ is situated above the level of the carapace; the 

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



