337 



middle, slender, 6,2-times as long as wide; excepting the strong tooth at the far end of the 

 posterior margin the merus is unarmed; on both margins a few short setae are inserted, at 

 the distal end of the anterior margin, however, one observes a long seta, half as long as 

 the joint. Carpus also slender, 1 mm. long and nearly 5-times as long as broad; posterior 

 margin with 4 spines. On the carpus of the right leg the 4 spines are equidistant and the 

 4 th is hardly farther distant from the 3 ,d as from the distal extremity, but on the carpus of 

 the left the 4* spine is placed just near the distal extremity, almost as in Coutière's figure 1 -jd. 

 There is a long seta at the distal third of the anterior margin and this seta is as long as that 

 at the far end of the merus. The slender propodus, that measures a little more than two- 

 thirds of the merus, is 1,32 mm. long, 0,2 mm. wide, thus 6,6-times as long as wide; its posterior 

 margin bears 9 pairs of spinules, each pair consisting of a longer and a shorter spinule, there 

 is also a setiform spinule at the far end of the anterior margin which is furnished with a few 

 setae. The dactylus, 0,4511:111. long, measures one-third of the propodus; accessory claw little 

 shorter than the principal. 



General distribution: Laccadive Archipelago (Coutière). 



II. Macrochirus group. 



5. Alphcus acuto-femoratus Dana. 



J. D. Dana, U.S. Exploring Exp. Crust., 1852, p. 550, PI. 35, Fig. 2. 



J. G. DE Man, Abhandl. Senckenb. Naturf. Ges. XXV, 1902, p. 886, PI. XXVII, Fig. 65. 



Syn.: Alphcus parabrevipes Coutière, Buil. Soc. Entom. France, 1898, N° 6, p. 151. 



Nee: Alpkeus acuto-femoratus Spence Bate, Report Challenger Macrura, 1888, p. 545, PI. 97, Fig. 2. 



Stat. 125. July 18/19. Anchorage off Sawan, Siau-island. Reef. 3 specimens, 2 of which are 



adult and with eggs. 

 Stat. 149. August 10/11. Fau-anchorage and lagune, West coast of Gebé-island. Reef. 1 egg- 



bearing female. 



These specimens fully agree with my detailed description of 1902. 



A. parabrevipes Cout. from Samoa is apparently identical with this species. 



General distribution: Balabac Strait (Dana); Ternate (de Man); Samoa (Coutière). 



f6. Alphcus gracilis Heller, var. 



C. Heller, in: Sitzungsber. Kais. Akad. Wiss. Wien. XLIV, 1861, p. 271, Taf. III, Fig. 19, 20. 

 J. G. DE Man, in: Zoolog. Jahrb. IX, Abth. f. Syst. 1S97, p. 733, Taf. 34, Fig. 60^, 60/*. 



Stat. 225. November 8. 5700 m. N. 279 E. from South point of South-Lucipara-island. Reef. 

 1 adult specimen, probably a female. 



A reexamination of Heller's type specimen of A. gracilis from the Red Sea, kindly 

 entrusted to me by Prof. von Marenzeller of the K. K. Naturhistorisches Hofmuseum at Vienna, 

 enabled me to make the following observations on this specimen and on that from the reef 

 near South-Lucipara-island. 



The specimen from this island must probably be considered as a variety of A. gracilis, 



205 



