38 A. Alcock — Carcinological Fauna of hidia. [No. 1, 



produced. The last spine of the antero-lateral border is hardly twice 

 the length of any of the others. The costee of the wrist and hand are 

 low, and the spine at the inner angle of the wrist is about two-thirds 

 the length of the palm. 



A single male specimen from the Pedro Shoal north of the Lacca- 

 dive Islands. The carapace is 12 millim. long and 18 millira. broad 

 including the spines. 



17. Neptunus (Hellenus) hastatoides (Fabr.) A. M. Edw. 



Fortunus hastatoides, Fabricitis, Ent. Syst. Suppl. p. 368. 



Cancer hastatus, Herbsfc, Krabben, III. iii. 3, pi. Iv. fig. 1. 



Amphitrite hastatoides, De Haan, Faun. Jap. Crust, p. 39, pi. i. fig. 3 : Stimpson, 

 Proc. Ac. Nat. Sci. Philad. 1858, p. 38. 



Neptunus hastatoides, A. Milne Edwards, Archiv. du Mus. X. 1861, pp. 332, 338: 

 Miers, Zool. H. M. S. Alert, pp. 183, 229, and Challenger Brachyura, p. 175 : J. R . 

 Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 368 : Ortmann, Zool. Jahrb., 

 Syst., VII. 1893-94, p. 74: de Man, Zool. Jahrb., Syst., VIII. 1894-95, p. 557. 



Carapace very flat, its length in the middle line is about two-thirds 

 its breadth not counting the great lateral spines, finely subtomentose, 

 its surface symmetrically broken up into low subregional convexities 

 the summits alone of which are granular. 



Front slightly prominent beyond the inner supra-orbital angles and 

 cut into four teeth, the middle two of which are very much narrower 

 and acuter than, and are usually as prominent as or even more pro- 

 minent than, the others : the inconspicuous apical prolongation of the 

 epistome can be seen betv7een, but does not project beyond, the middle 

 teeth. Supra-orbital border cut by two fissures into three lobes, the 

 outer angle of the middle lobe being dentiform. 



Antero-lateral borders of moderate length and obliquity, cut into 9 

 teeth (including the outer angle of the orbit) the last of which is less 

 than three times the length of any of the others in adults, but is longer 

 in the young. The finely-beaded posterior border is practically 

 straight, and forms a sharp or claw-like angle of junction with the 

 postero-lateral borders. 



Eyes large and reniform, not concealed by the entirely-dorsal 

 orbits. The antero-lateral angle of the merus of the external maxilli- 

 peds is acutely produced in a lateral direction. 



Chelipeds in the adult male slightly more than twice the length 

 of the carapace, finely subtomentose, the hands little if at all less mas- 

 sive than the arm. 3 or 4 spines on the anterior (inner) border of the 

 arm, 2 near the far end of the posterior border : hand and upper surface 

 of wrist costate, the costae granular : inner and outer angles of wrist 

 strongly spiniform : two spines on the hand, one being in front of the 

 apex of the wrist-joint the other just behind the finger-joint. 



