96 



which are least distinct on the 5th pair, and the propodite is tipped with rather 

 lank tufts of setae. 



In two egg-laden females and two males the measurements are as follows, in 

 the median line : 



Free portion of Carapace proper. Abdomen. 



*rtC+n TM 



rostrum. 



Colour in life pink, eggs light blue. 



Dredged in plenty in the Andaman Sea, at 194, 188 to 220, 271, and 405 

 fathoms ; in the Bay of Bengal, off Ceylon, at 224 to 284 fathoms ; and in the 

 Arabian Sea, off the Travancore coast and C. Comorin, at 142 to 400 and 430 

 fathoms. 



Our specimens are identical with specimens dredged in the Mediterranean 

 and presented by Professor Giglioli of the Florence Museum. 



"R A TV 8576 . S579 . 3121 _ 6801-6820 _ 9301-9303 , 1420-14*2 _ 1444-1415 2106-2107 



Kegd. 1 DS. : 6 : : 9 jjj- : ^ : : - : 



588 _ 3400 



"To" * 10 * 



51. Pandalus (Plesionika) ensis, A. M. Edw. 



Acanthephyra ensis, A. Milne Edwards, Ann. Sci. Nat., Zool., (6) XI. 1881, Art. 4, p. 14. 



Pandalus ensis, A. Milne Edwards, Recaeil Fig. Crust, pi. 35. 



? Plesionika uniproducta, Spence Bate, Challenger Crust. Macrnra, p. 641, pi. cxiii. fig. 1. 



Very similar to P. martins, from which it differs only in the following 

 characters : 



At the proximal end of the rostrum there are 5 or 6 teeth, three or four 

 close together, two isolated anteriorly. 



The posterior border of the 3rd abdominal tergum is acutely produced in 

 the middle line to form a spine. The 6th abdominal tergum is longer than the 

 telson, and is more than twice as long as the 5th. 



Though the last 3 pairs of legs are longer than the first 2 pairs, yet they 

 are not so much longer, the 5th pair being nothing like twice the length of the 

 1st pair. The seta? at the end of the carpus, and on the chelae of the 2nd pair 

 of legs are much finer and less conspicuous. 



In the Investigator collection are 2 specimens, from the Andaman Sea, 185 

 fathoms. 



