60 



ZOOLOGISCHE MEDEDEELINGEN — DEEL II. 



which is straight, while the lower is slightly concave, appears rather 

 much compressed and lamellar. Mer us just as long as ischium, but 

 broader, 2,5-times as long as wide; this joint is less compressed than 

 the ischium, so that, while its inner surface is flattened, the outer ap- 

 pears rather much convex transversely and slightly also longitudinally ; 

 upper margin convex, lower running like a S. Carpus one-fourth 

 longer than merus, elongate, appearing 2,7 -times as long as wide, 

 upper margin straight, lower arcuate; upper surface a little convex 

 transversely. Chela one-fifth longer than carpus, slightly 

 less broad ; the palm, the outer surface of which is a trifle convex trans- 

 versely, appears a little shorter than the pointed fingers, which are 

 crossing one another. The margins of this leg are somewhat hairy and 

 the fingers present the usual tufts of hair. The following legs apparently 

 not differ from those of Call, armata. Propodus of third legs (Fig. 6) 

 with the upper margin of the lobe straight, the posterior angle and the 

 posterior margin rounded, the lower margin slightly concave. 



Measurements in millimeters. 



Length from tip of rostrum to end 

 of telson 85 



Length of carapace 



Length of l 3t abdominal somite 



Width 



» » 



» 



Length 



» 2°* 



» 



Width 



» » 



» 



Length 



» 3rd 



» 



Width 



)) » 



» 



Length 



)) 4*h 



» 



Width 



)) » 



» 



Length 



» 5th 



» 



Width 



» » 



» 



. 22 

 . 40,25 

 . 11 

 . 12 

 . 12 

 . 8,5 

 . 13 

 . 5,5 

 . 13 

 . 7,5 

 . 12,5 



Length of 6th abdominal somite. . 13,5 



Width » » » » . . 10,25 



Length » telson. 5,75 



Width » „ 7,5 



Length » ischium 8,5 



Width » » 1,75 



Length » merus 8,5 



Width » » 3,2 



Length » carpus 10,5 



Width » » 3,9 



Length » chela 12,5 



» » palm 6 



» » fingers 6,5 



Width » palm 3,7 



Alpheus crassimanus Heller. 



Alpheus crassimanus C. Heller, Crustaceen der Novara-Reise, 1865, p. 107, 

 PI. X, fig. 2. 



Alpheus crassimanus J. G. de Man, The Decapoda of the Siboga Expe- 

 dition, Part II, Family Alpheidae, Leyden, 1911, p. 417. 



One young male, collected by Mr. Buitendijk, Nov. 1910, at Poeloe Weh. 



This specimen, 14 mm. long from tip of rostrum to end of telson, 

 quite well agrees with the young male from Stat. 60, described in my 

 work on the Alpheidae collected by the Siboga Expedition. The smaller 



