has usually been observed in less deep water, so e.g. off Lion's Head, South Africa, in 131 

 to 136 fathoms, Pics. Parfaiti (A. M.-Edw.) and Pies, geniculata (A. M.-Ed\v.) dredged by 

 the "Travailleur" at a depth of 738 fathoms and, finally, the little Pies, capreensis Lo Bianco, 

 which was taken in 1260 fathoms near the island of Capri. 



Key to the indopacific species of the genus Plesionika Bate. 



c?j The legs of the s"** pair are of equal or nearly equal length. 

 b^ Rostrum longer than antennal scale (in one species, Pies, 

 brevirosfris Bate, in which the rostrum is about as long as 

 the scaphocerite, the lower border is smooth, while the upper 

 is smooth beyond the basal joint of antennular peduncle). 

 Tj The dorsal border of the rostrum, beyond the tip of the 

 antennular peduncle, is t]uite smooth. 

 d^ Lower margin of the rostrum dentate. 

 e^ The ventral border of the rostrum is very closely and evenly 



serrated; ocellus distinct. 

 y"i The posterior border of the 3"^'^ abdominal tergum, though 

 convex, is not acutely produced. 

 g^ Rostrum from 45 to 67 per cent, of the length of the 

 bod)-, when the bod)- is measured from the back of 



the orbit to the tip of the telson iiiarfia (A. ^L-Edw.) 



(A. Milne-Edwards, Recueil de Figures de Crustace.s nouveaux ou peu 

 connus, lere Livr., 1SS3, PI. 21). 



g.. Rostrum from 34 to 47 per cent, of the length of the 

 body, when the body is measured from the back ot 



the orbit to the tip of the telson . . niariia (A. M.-Edw.) var. semilaevis Bate 

 /, The posterior border of the s"' abdominal tergum is acutely 



produced into a sharp tooth that overlaps the ne.xt tergum ensis (A. M;-Edw.) 

 (A. Milne-Edw^ards, in: Annal. Sc. Nat., Zool. (6) XI, 1881, Art. 4, p. 14; 

 Recueil Fig. Crust, nouv. 18S3, PI. 18). 



e„ The ventral border of the rostrum is armed with a series 



of distant spines; no ocellus A I coc ki {h.K.S. Anderson) 



(A. R. S. Anderson, in: Journ. Asiat. Soc. Bengal, Vol. LXV, pt. 2, 1896, 

 p. 92; Illustrations of the Zoology of the Investigator, Crustacea, I'i. 1,11, 

 Fig. 2 cf, Fig. 4$)- 

 d„ Lower margin of the rostrum free from spines, rostrum 



subequal with the antennal scale brcvirosirts Bate 



;C. Spence Bate, Report Challenger Macrura, 1888, p. 650, PI. CXIIl, 

 fig- 5)- 



fj At the base of the rostrum two strong teeth stand above the 

 eye ; of the rostrum proper the hindermost third is unarmed, 



SlEOGA-EXrEDlTIE XXXlXo'. 



