26o 



g„ Species not exceeding 48 mm. in length. Abdomen 

 3-time.s as long as carapace. Anterior gastric spine 



considerably smaller than posterior. . . occidentalis Faxon var. iiidica de Man 



e^ Peraeopods of the first pair with the outer margin of the 



merus armed with a spine Challengeri Ortm. 



[PontopliilHs gracilis C. Spence Bate, Report Challenger Macrura, 1888, 

 p. 4S7, Pi. 87; Pontophilus challengeri A. Ortmann, Dccapoden und 

 Schizopoden der Plankton-Expedition, Bd. II. G. b., Kiel und Leipzig, 

 1893, p. 49.) 



d^ On either side of the mid-dorsal line a row of minute 



spines terminating in one principal tooth. One spine on 



each hepatic region. Rostrum short, rounded at apex, 



narrowed, concave above Paitersonii (Kinahan) 



(J. R. Kinahan, Proc. Royal Irish Acad. Vol. VIII, Part i. Dublin 1862, 



p. 4. S. Pi. V.) 



fj Mid-dorsal line of carapace with two spines, 

 rt'i Carapace with six lateral spines. 

 t', Mid-dorsal spines of carapace placed close together on 

 the anterior third. Antennal scale a trifle more than 



twice as long as wide a«i-/;-«//.f (Hutton) G. M. Thomson 



(G. M. Thomson, On the New .Zealand PhyHobranchiate Crustacea- 

 Macrura. London 1903, p. 434, PI. 27, figs. 1 — 5.) 



^0 Mid-dorsal spines of carapace widely separate, posterior 

 spine placed exactly on the middle of the carapace. 

 Antennal scale considerably less than twice as long 



as wide Chiltoni Kemp 



(Stanley Kemi-, Records Indian Museum, Vol. VI, Part i, Calcutta lyii, 

 p. 5, PI. II, figs. 6—10.) 



d„_ Carapace with three lateral spines : two are placed on the 

 first or upper one of the three lateral keels, the third 

 spine on the lower, while the second or middle keel is 



unarmed. Rostrum truncate bidentatus (de Haan) 



(W. UE Haan, P'auna Japonica. Crustacea, 1849, p. i S3, PI. XL V, fig. 14.) 

 d.^ Carapace with two lateral spines. 

 Rostrum acute, slender. 



6^1 Rostrum without lateral teeth Juncens Bate 



(C. Si'ENCE Bate, I.e., p. 491, PI. 88, figs. 2— 4.) 



e^ Rostrum with one lateral tooth on each side. Spines of 



the lateral faces of carapace in an oblique plane . . gracilis S. I. Smith 

 (S. I. Smith, I.e., 1882, p. 36, PI. VII, figs. 2— 3^.) 



6'.. Rostrum with two lateral teeth on each side. Spines of 



the lateral faces of carapace in the same level . . . projiiudns Bate 

 (C. Spence Bate, I.e., 1888, p. 490, PI. 88, fig. i.) 

 d^ Carapace with one spine on each side. 



I 



