78 



In the largest specimen the rostrum is 20 millim. long, the carapace, 

 measured in the middle line, 29 millim., and the abdomen 66 millim. 



Found here in the Arabian Sea in 457-589, 595—556, and 865 fathoms; in 

 the Bay of Bengal in 5G1 and 753 fathoms, and in the Andaman Sea in 405 and 

 498 fathoms. 



t> l -it 6756-6757 



Kegel. JNos. 



Acantiiephyra eximia var. brachytelsonis (Spence Bate). 



Acantiiephyra brachytelsonis, Spence Rate, Challenger Crust. Maerura, p. 753, pi. exxvi. fig. 7: Wood-Mason. 

 Annals and Mag. Nut Hist. (6) VII 1891, p. 195 and (6) IX. 1892, pp. 362, 363, fig. 4. 

 Illustrations of the Zoology of the Investigator, Crustacea, Plate III. Pig. 2. 



A. brachytelsonis ought, perhaps, not to be separated from A. eximia, from 

 which it differs only in the following unreliable characters : — 



The ventral border of the rostrum has only 3 teeth — two being close 

 together at, or just abaft, the middle, and the third being about midway between 

 these and the tip. 



The basal crest of the rostrum is armed (dorsally) with from 5 to 7 (usually 

 6) teeth, in advance of which the dorsal border of the rostrum is usually quite 

 smooth. 



Colour in life, crimson. 



In the largest perfect specimen the rostrum is 30 millim. long, the carapace 

 34 millim., and the abdomen 78 millim. 



Found here in the Arabian Sea in 738, 740, 865, 890, 902, 912-931, 947 

 and 1000 fathoms ; in the Bay of Bengal in 753 and 800-637 fathoms, and in 

 the Andaman Sea in 490, 500 and 683 fathoms. 



Wood-Mason considered, with some justification, that Spence Bate's A. angusta is, like 

 A. brachytelsonis, identical with A. eximia. 



40. Aeanthephyra armata, A. M. Edw. 



Aeanthephyra armata, A. Milne Edwards, Ann. Sci. Nat., Zool., (6) Xt. 1881, Art. 4, p. 12, and Eec. Fig-. 

 Crust, pi. 28, fig. 1 : Spence Bate, Challenger Crust. Maerura, p. 744, pi. exxr, fig. 2. 



Acmthephyra armata var., Wood-Mason, Ann. Mag. Nat. Hist. (6) IX. 1892, pp. 359, 360, fig. 2. 

 Illustration's of the Zoology of the Investigator, Crustacea, Plate hi. Fig. 1. 



Differs from A. eximia in the following characters : — 



The rostrum is produced as a low carina to about the middle of the gastric 

 region, behind which it is continued as an indistinct ridge. (As in A. eximia 

 it varies in length, being sometimes a good deal longer and sometimes a good 



