21 



Hepatic spine neither very long, nor slender and not trending 



strongly outward. Carapace and abdomen densely tuberculated regalis Bate 



hivestigatoris W.-Mas. 

 {A. Alcock, I.e. p. 127). Investigaioris wa.v. andama7iensis\\! .-'^la.s. 



d. Anterior moiety of the fourth or lateral crest of the carapace 

 undivided and terminating anteriorly in a single small spine. 

 c^ Anterior moiety of the y^ carapacial crest present and ending 

 in the orbital spine. 

 d^ Posterior moieties of the 3'''' and 4''' carapacial crests running 

 parallel with the upper border of the carapace. Abdominal 

 carinae distinct, also on the anterior terga. 

 e^ Posterior moiety of subdorsal crest smooth and entire. Branchial 



region smooth between the 2"'', y^ and 4'^ crests . . . hastacauda Bate 

 e„ Posterior moiety of subdorsal crest divided into 4 or 5 low, 

 obtuse tubercles. Branchial region granulate between the 



2"'^, 3'''^ and 4''' crests pugnax de Man 



d.^ Posterior moieties of the 3"^ and 4'^ 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 . . acuntinata Bate ') 



(C. Spence Bate, Report Challenger Macrura, 1888, p. 522, PL XCIV, 



figs. 2, 3). 



C, Anterior moiety of the 3'''^ carapacial crest, when present, never 

 ending in the orbital spine, 

 fl'j Posterior moiety of the 2°^* or subdorsal crest tuberculate. 

 ^j Tubercles of the abdomen numerous. Upper surface of the 



rostrum smooth, not corrugated. 

 f^ Tubercles of the i*"^ or dorsal crest rather prominent, sharp. 



Telson much longer than uropods 7iobilis A. M.-Edw. 



(A. Milne-Edwakds, I.e. 1S81, p. 5 and I.e. 18S3, Plate 39.) 



/, Tubercles of the i"> or dorsal crest low and obtuse, mostly 



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

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



Upper surface of the rostrum corrugated /ougit'oslris (S. I. Smith) 



(S. I. Smith, Bull. Mus. Comp. Zool. X, p. 51, pi. 5, fig. i, pi. 6, fig. i, 1882.) 

 d„ Posterior moiety of the 2"'' or subdorsal crest smooth. 

 e^ The y^ or dorso-lateral crest of the carapace is present behind 



the cervical groove only unguiculata W.-Mas. 



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



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



SIKOGA-EXrEIllTlE XXXIX .j'. 28 



