217 



Hepatic spine neither very long, nor slender and not trending 



strongly outward. Carapace and abdomen denselytuberculated regalis Bate 



Investigatoris W.-Mas. 

 (A. Alcock, l.c. p. 127). Investigatoris var. andamanensis\\ '.-Mas. 



■^ó s Anterior moiety of the fourth or lateral crest of the carapace 



undivided and terminating anteriorly in a single small spine. 



£ l Anterior moiety of the 3 rd carapacial crest present and ending 



in the orbital spine. 



d x Posterior moieties of the 3 rd and 4 th carapacial crests running 



parallel with the upper border of the carapace. Abdominal 



carinae distinct, also on the anterior terga. 



<?, Posterior moiety of subdorsal crest smooth and entire. Branchial 



region smooth between the 2 nd , 3 rd and 4 th crests . . . hasfacaitda Bate 



e 2 Posterior moiety of subdorsal crest divided into 4 or 5 lovv, 



obtuse tubercles. Branchial region granulate between the 



2 nd , 3 rd and 4" 1 crests pugnax de Man 



d 2 Posterior moieties of the 3 vd and 4 111 carapacial crests directed 



obliquely downward, not running parallel with the upper 



border of the carapace. Abdominal terga nearly smooth, the 



dorsal median carina reduced to very slight elevations . . acuminata Bate ') 



(C. SPENCE Bate, Report Challenger Macrura, 1888, p. 522, PI. XCIV, 

 figs. 2, 3). 



c„ Anterior moiety of the 3 rd carapacial crest, when present, never 

 ending in the orbital spine. 

 d x Posterior moiety of the 2 nd or subdorsal crest tuberculate. 

 e x Tubercles of the abdomen numerous. Upper surface of the 



rostrum smooth, not corrugated. 

 /, Tubercles of the i st or dorsal crest rather prominent, sharp. 



Telson much longer than uropods nobilis A. M.-Edw. 



<A. Milne-Edwakds, l.c. iSSi, p. 5 and l.c. 18S3, Plate 39.) 



ƒ, Tubercles of the i th or dorsal crest low and obtuse, mostly 



longer than broad. Telson little longer than uropods . . assimilis de Man 

 ■<e„ Tubercles of the abdomen few in number, obtuse, punctate. 



Upper surface of the rostrum corrugated /ougirostris (S. I. Smith) 



(S. I. SMITH, Buil. Mus. Comp. Zool. X, p. 51, pi. 5, fïg. 1, pi. 6, fig. 1, 1882.) 



d 2 Posterior moiety of the 2 nd or subdorsal crest smooth. 

 e 1 The 3 rd or dorso-lateral crest of the carapace is present behind 



the 



cerv 



ical groove only unguiculata W.-Mas. 



(J. Wood-Mason, Annals Mag. Nat. Hist. for February 1891, p. 193.) 



1) The characters of this species are partly taken from the figures in Bate's work. 



SIROGA-EXrEDITIE XXXIXa 3 . 



