262 



y„ Terminal spine of antennal scale reaching nearly as far 

 forward as the distal end of the lamella. Sixth abdo- 

 minal somite almost four times as long as thick . 



d^ Carapace with one spine on each side 



(Stam.ev Kemt, I.e., 1910, p. 146, PI. XXI, figs. 2, a and b.) 

 d.^ Carapace without lateral spines. 

 c^ Carapace longer than broad. 



/j On either side of the mid-dorsal line of the carapace are 

 two lobe-like folds, that anteriorix are well-defined 

 and rounded. Rostrum very broad, abruptly truncate 



at apex 



(Stanley Kemp, I.e., 1910, p. 151, ri. XXI, figs. i,a and b.) 



/, Carapace without lobe-like folds on either side of the 

 middle line. Rostrum rather narrow with rounded apex 

 (Stanlev Kemt, I.e., lyio, p. 153, PI. XXI, figs. 5, a and /;.) 



e„ Carapace broader than long. Immobile finger of subchela 



formed of two teeth, closely juxtaposed and not articulated. 



/j Telson furnished at the apex with a long and slender 



tooth, flanked by a pair of plumose setae .... 



(Th. R. R. SteBBING, Annals South African Museum, XV, London, 191 5, 

 p. 71, PI. LXXIX.) 



/, The apex of the telson consists of a triangular plate 



with a minute spinule on either side and with two 



pairs of plumose setae arising from beneath it 



(Stanley KemI', Memoirs Indian Mus., V, 1915, p. 261, PI. XIII, fig. 8.) 



c^ Mid-dorsal line of carapace without .spines. 



d^ Rostrum well-developed, as long as the eyes, apex broad, 



scjuarely truncate 



fl'j Rostrum exceedingly small, con.sisting merely of a small 



llat, triangular, acute prolongation of the median part 



of the carapace, so that the eyes are contiguous 



(Stanley Kemp, I.e., 1916, p. 372, PI. VIII, fig. 6.) 



b„ Abdomen with at least the thinl and following somites carinated. 



f, Carapace with no spine in the mid-dorsal line. Three lateral 



keels, of which the first and the third are unispinose 



(W. Stimi'Son, Proe. Acad. Xat. Sciences Philadelphia, i860, p. 25.) 



r. Mid-dorsal line of carapace with one spine. Three lateral 



keels, the first without a spine, but abruptly notched near 



its middle point, the secoml witli a spine and a notch, 



third unarmed 



(Stanley Kemi', I.e., 191 1, p. 6, PI. II, figs. 11 — 14.) 



f.. Mid-dorsal line of carapace with three spines. 



modesiiis de Man 

 irispinostis Hailstone 



fasciatus (Risso) 

 neglcctns (G. O. .Sars) 



megalocheir (Stebbing) 



Ilendersoni Kemp 



candidtis Kemp 9 



parvirosti'is Kemp 



carinicaiida (Stimps.) 



sabscchoia Kemp 



