2ÓI 



e l Carapace subquadrate, as broad as long. 



Rostrum broad, flattened, obscurely trifid at the apex. 



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

 (S. W. FULTON and F. E. GRANT, Proc. Roy. Soc. Victoria, Vol. XV 

 (New Series), Pt. I, 1902, p. 63, PI. X, lig. 1.) 



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 modumanuensis Rathb. 



-\t s 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, 1. c, 1910, p. 152, PI. XXI, figs. 4, a and b.) 

 -^£ 3 Mid-dorsal line of carapace with one spine '). 



d x 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 fine teeth Flindersi Fulton and Grant 

 (S. W. Fulton and F. E. Grant, 1. c, p. 6;, PI. X, fig. 3.) 

 d„ Carapace with three lateral spines. 

 e x Of the three lateral spines the two lower ones are 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 plebs Kemp 

 (Stanley Kemp, I. c, 1916, p. 370, PI. VIII, fig. 5.) 



e 2 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 modestiis de Man 



d s Carapace with two lateral spines. 

 l\ 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 iutcrmcdius (Bate) 

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

 e„ No row of minute denticles between the mid-clorsal 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 . . caudidus Kemp d 

 (Stanley Kemp, 1. c, 1916, p. 365, textfigure 3.) 



1) In Font. neglccltis sometimes behind this spine an obscure tubercle is obsevved in the mid-dorsal line. 



