1896.] A. R. S. Anderson — Beep Sea Crustacea. 93 



dorsal carina begins near the middle of the carapace and in the gastric 

 region supports four movable spines which gradually increase in length 

 from behind forwards. The rostrum, about If as long as the carapace, 

 is armed dorsally with 2 fixed teeth, the posterior situated midway 

 between its fellow and the anterior movable spine and above the centre 

 of the cornea. In front of these teeth the rostrum slopes downwards 

 as far as the extremity of the first antennal base ; thence it becomes 

 straight and ascends slightly to near its tip where it again assumes a 

 gentle downward curve. Except for the two teeth near the base it is 

 dorsally unarmed, while its lower margin is 4-7 toothed, the number of 

 teeth increasing with the size of the specimen. 



The eye bears no ocellus distinct from the large cornea. 



The meri of the last three thoracic legs are armed on their lower 

 margins with a few teeth, that of the 5th leg bears the fewest or none, 

 that of the 3rd the largest number of teeth, while the 4th bears an 

 intermediate number. 



The telson is shorter than the caudal plates. 



Colour in life red. Eggs very minute and numerous. 



Many specimens, both males and ovigerous females, from Station 

 197;406'fms. 



Plesionika, Spence Bate. 

 17. Plesionika hifurca, Alcock and Anderson. 

 Alcock and Anderson, J. A. S. B., Vol. LXIII., pt. ii., 1894, pp. 155 and 156. 

 Station J 97; 406 fms. 



Family Acanthephyridse. 



AcANTHEPHYRA, A. Milne-Edwards. 



18. Acanthephyra hracJiytelsonis, Sp. Bate. 



Spence Bate, ' Challenger ' Macrura, p. 753, pi. cxxvi., fig. 7 ; Wood-Mason, 

 Ann. Mag. Nat. Hist., May 1892, pp. 362, 363, fig. 4 ; Alcock and Anderson, J. A. 

 S. B., Vol. LXIII., pt. ii., 1894, p. 156 ; and 111. Zool. K. I. M. S., 'Investigator,' 

 Crustacea, pi. iii., fig. 2. 



The largest specimen obtained this year measured 357 millim, 

 from tip of rostrum to the end of telson. 



Stations 183, 184, 192, 193, 194 and 199; 890, 947, 912-931, 931. 

 891 and 800-637 fms. respectively. 



19. Acanthephyra armata, A. M. E,, Yar. fimhriata, W.-M. 



Wood-Mason, Ann. Mag. Nat. Hist., May 1892, p. 359, fig. 2 ; Alcock and 

 Anderson, J. A. S. B., Yol. LXIII., pt. ii., 1894, p. 156 ; and 111. Zool. R. I. M. S. 

 * Investigator,' Crustacea, pt. i., pi. iii., fig. i. 



Station 197 ; 406 fms. 



