of the fourth legs 



Length of merus 



Width of merus 



Proportion between length and width of merus .... 

 Length of carpus from articulation to articulation. 



Width of carpus 



Proportion between length and width of carpus .... 



Length of propodus 



Width of propodus 



Proportion between length and width of propodus . 

 Length of dactylus • . . . 



Table C and Table D : N° i male from Stat. 49* ; N° 2 male from Stat. 5 1 ; N° 

 from Banda. 



1,65 



0,41 



4 

 0,66 

 0,29 

 2,28 



1,6 

 0,26 



6,i 

 0,46 



male 



f 8. Synalpheus jcdanensis de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI, 1909, p. 117. 



Stat. 273. December 2326. Anchorage off Pulu Jedan, East coast of Aru-islands (Pearl-banks). 

 13 m. Sand and shells. 3 males and 3 ova-bearing females. 



A nother new form of the Neomeris group, approaching to Syn. Gravieri and Syn. 

 Iphinoc, but distinguished by the stouter shape of the small chela and of the four posterior legs. 



In one of the male specimens the rostrum is narrow, 3-times as long as wide at its 

 base and reaching to the distal fourth of the visible part of first antennular article; it appears 

 distinctly longer than the supraorbital spines which are also narrow, though at their base broader 

 than the rostrum. The tips of the three frontal spines are setose, slightly curved upward and 

 project almost straight forward. In another male and in an adult female the rostrum reaches 

 almost to the end of first article, in another female, on the contrary, it extends to the distal third 

 only, while in the second male the supraorbital spines are very slightly converging. The visible 

 part of first antennular article is usually a little more than one and a half as long as the 

 second, in the ova-bearing female it is almost twice as long, the proportion being as 9:5; third 

 article as long or hardly shorter than second. The stylocerite reaches to the 2 nd third or fourth 

 part of second antennular article. 



Lower spine of basicerite curved outward, slightly shorter than the stylocerite; upper 

 spine turned upward, hardly half as long as the lower. Carpocerite very little longer 

 than the antennular peduncle, reaching only by one-thircl or one-fourth the third article beyond 

 it ; blade extending to the middle of third article, terminal spine of the scaphocerite as long 

 as the antennular peduncle, in one female even as long as the carpocerite. 



The telson resembles that of Syn. Iphinoc, the outer angles of the posterior margin 

 which is rather prominent in the middle, are spiniform though measuring hardly one-third the 

 length of the adjacent, short, external spinules. Spinules of the upper surface large, o, 15 — 0,1911101. 

 long, anterior pair situated just in front of the middle, but the distance between the two pairs 

 with regard to their distance from the posterior margin appears rather variable (vide the 

 measurements). 



90 



