26l 



e^ Carapace subquadrate, as broad as long. 



Rostrum broad, flattened, obscurely trifid at the apex. 



Lateral spine of carapace turned obliquely inward . . obliqmts Fulton and Grant 



(S. W. Fulton and F. E. Gr.\nt, Proc. Roy. Soc. Victoria, Vol. XV 

 (New Series), Pt. i, 1902, p. Gi, PI. X, fig. i.) 



e„_ Carapace much longer than broad. 



Rostrum acute, armed on the basal half with two spines 

 on each side. Lateral spine of carapace directed straightly 



forwards modumaniiensis Rathb. 



d.^ Carapace without lateral spines. 



On either side of the carapace are numerous minute tubercles 



arranged in more or less distinct longitudinal series . bispinosus Hailstone and Westwood 

 (Stanley Kemp, I.e., 1910, p. 152, PI. XXI, figs. 4, a and b.) 

 c.^ Mid-dorsal line of carapace with one spine '). 

 d^ Carapace with four lateral spines, one a little behind the 

 level of the mid-dorsal spine and three, behind one 

 another, just posterior to the antero-lateral spine. A curved 



ridge behind the eyes is cut into four small iine teeth Flindersi Fulton and Grant 

 (S. W. Fulton atid F. E. Gr.vnt, 1. c., p. 6], PI. X, fig. 3.) 

 rt'. Carapace with three lateral spines, 

 t', Of the three lateral spines the two lower ones arc placed 

 close together, the posterior much farther distant from 

 the third or hepatic spine as from the anterior. Laminar 

 portion of antennal scale exceeding far the terminal spine picbs Kemp 

 (St/\nlev Kemp, I.e., 1916, p. 370, PI. VIII, fig. 5.) 



e. Of the three lateral spines the two lower are not placed 

 close together, the posterior being as far distant from 

 the hepatic spine as from the anterior. Laminar 

 portion of antennal scale not or hardly exceeding the 



terminal spine modestus de Man 



d.. Carapace with two lateral spines. • 



e^ Between the two lateral spines and the mid-dorsal line 

 is a row of minute denticles extending from the orbital 



spine backward to just beyond the middle of carapace intermedhcs (Bate) 

 (C. Spence Bate, Proc. Zool. Society, London, 1863, p. 6, PI. XLI, fig. 6.) 

 e. No row of minute denticles between the mid-dorsal line 



and the lateral spines of the carapace, 

 /j Terminal spine of antennal scale not reaching nearly as 

 far forward as the distal end of the lamella. Sixth 



abdominal somite about twice as long as thick . . candidus Kemp cT 

 (Stanley Kemp, I.e., 1916, p. 365, textfigure 3.) 



.) In /W. ncgUCus sometimes behind this spine an obscure tubercle is observed in the mid-dorsal line. 



