311 



f„ Larger chela more distinctly notched at the base of the 

 immobile finger. Rostrum reaching to the extremity of 

 i"^ antennular article. Movable spine of exopod of caudal 



fan black gracilis Heller var. luciparensis n. 



^3 Larger chela emarginate anteriorly, dactylus hammer-shaped. 

 Scale of scaphocerite rudimentary, hardly reaching to the 

 middle of 2°^ antennular article. First carpal article of 2"*^ 

 legs distinctly longer than the sum of the three following. 



Movable spine of exopod of caudal fan black .... architectus de Man 

 (J. G. DE Man, in: Zool. Jahrb. Abth. f. Syst. IX, 1897, p. 726, PI. 34, Fig. 60). 



d„ Inferior spine of basicerite reaching almost to the end of 2°'^ 

 antennular article. Larger chela with the upper border longi- 

 tudinally grooved. First carpal article of 2"*^ legs a little 



shorter than the sum of the two following socialis Heller 



(C. Heller, Crustaceen der Novara-Reise 1865, p. 106, PL X, fig. i). 



c„ Dactyli of three posterior legs simple. 



d^ Rostrum triangular, flattened above and separated by deep 

 sulci from the orbital hoods. Dactyli of three posterior legs 



obtuse. Large chela without grooves or furrows .... ventrosus H. M.-E. 

 ^/j Rostral carina not flattened above, rarely wanting at all. 

 Dactyli of three posterior legs acute. 

 e^ Rostral carina distinct; i*' carpal article of 2°^^ legs much 

 shorter than the sum of the four following. Larger chela 

 3-times, smaller 5 -times as long as high, 

 y^ Lateral (extra-corneal) teeth arising from the anterior 

 marein of the front: between these teeth on either side 

 of the rostrum an arcuate prominence. Large chela with 

 the upper border conspicuously longitudinally grooved 



on the inner side facetus de Man 



f„ Lateral (extra-corneal) teeth arising from the upper surface 

 of the eye-hoods, no prominence on either side of the 

 rostrum ; the longitudinal groove on the upper border 

 of the palm much less distinct than in A. facetus . . splejididus Cout. 

 (H. COUTIERE, Bull. AIus. Paris, 1897, N" 6, p. 235). 



^3 Rostrum minute, not longer than the equally acute extra- 

 corneal spines, not produced backward as a carina. First 

 carpal article of 2"*^ legs longer than the sum of the four 

 following. In the larger chela the socket in the fixed 

 finger and the plug-like tubercle of the dactylus that fits 



into it, are entirely wanting. A deep-sea species. . . Shearmei hXz.^tS.xxd.itxs. 

 (A. Alcock, Descript. Catal. Indian Deep-Sea Crustacea. Calcutta 1901, p. 141). 



179 



