367 



is obtuse, truncate and the margins are beset witli long liairs; penultimate joint half as long 

 as the terminal. 



Inner margin of merus of the large cheliped terminating at the distal extremity in an 

 acute tooth or lobe, the two other margins unarmed. The fingers of the large chela which is 

 6,8 mm. long, are hardly half as long as the palm. Of the small cheliped which is placed on 

 the left side, the chela is half as long as that of the other, iingers a trifle shorter than the 

 palm. The height (breadth) of the outer face of the palm is in proportion to its length as 

 7 : 8, but according to Coutiere's figure (I.e. PI. LXXXII, fig. 36 (^) this proportion should be 

 in A. clypeatus as 7 : 10, the palm being here longer in proportion to its height; dactylus 

 twice as long as broad. The carpal segments of the second legs are respectively 0,96 mm., 

 0,56 mm., 0,28 mm., 0,32 mm. and 0,56mm. long; the chela is 0,74mm. long, fingers about 

 as long as the palm; in A. clypeaUis the 2°*^ segment appears hardly shorter than the i^', 

 while in this specimen the i*' is more than one and a half as long as the 2°"^. Merus of third 

 legs almost 4-times as long as broad, appearing a little more slender than in A. clypeahis, 

 and this is also the case with the following joints. 



The female from Stat. 133 is 16 mm. long. The minute rostrum is smaller than in the 

 male just described, it is only 0,04 mm. long, one-tenth the visible part of i^' antennular 

 article; 2°^* article almost twice as long as the visible part of the i=^ The distal spine of the 

 scaphocerite extends with one-third of its length beyond the blade. The spinule on the basal 

 joint of the outer antennae is 0,12 mm. long, 3-times as long as the rostrum. Of the large 

 chela, situated on the left side, the fingers are decidedly shorter than half the length of the 

 palm. While this chela is 5,5 mm. long, the smaller is not yet half as long, viz. 2,25 mm.; 

 fingers much shorter than the palm. The other legs are as in the male. Just as in the male 

 the inner uropod bears 6 or 7 spinules on the outer part of its free margin. 



The carpal segments of the ova-bearing female, long 15,5 mm., from Stat. 99 are 0,9 mm., 

 0,46 mm., 0,26mm., 0,28 mm. and 0,52 mm. long; chela 0,82 mm. long. In this specimen the 

 1=' segment is almost twice as long as the 2"'^. Inner uropod as in the preceding specimens. 



General distribution: Loo Choo Islands (Stimpson); Tahiti (Ortmann, de Man); 

 Kagoshima, Japan (Ortmann); Ternate (de Man); Maldive and Laccadive Archipelagoes (Coutiere). 



726. Alphens Stanley i Cout. var. dearmatus de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1910, p. 287. 

 Confer: H. CoUTIERE, in: Bull. Soc. Philom. Paris. (9) Tome XI, 1908, p. 17. 



Stat. 152. August 12/13. Wunoh-bay, N.W. coast of Waigeu-island. Reef. 2 males. 

 Stat. 240. November 22 till December i. Banda-anchorage. Black sand, coral and Lithothamnion- 

 bank in 18 — 36 m. i male. 



It is not clear in Coutiere's description of A. Stanleyi whether the merus of the 

 fourth legs is also armed with a strong spine, like that of the third; at my request Professor 

 Coutiere, however, kindly wrote me "que la 4™« paire a le meropodite epineux comme la 3"^" 

 It is therefore that the specimens collected by the "Siboga" are regarded as a variety, because 



23s 



