28 



posterior margin is 1,98 and the proportion between the length of the telson and the distance 

 of the posterior pair of spinules from the posterior margin 1,6. In this specimen the anterior 

 pair of spinules are situated just in the middle of the telson, in another specimen nearly of 

 the same size just before the middle. 



The relative measurements of the 3 rd peraeopod of the specimen long 6,5 mm. are: 

 merus 2,7, carpus 1, propodus 2,45. The merus which is armed on the distal half of the 

 posterior margin with 4 spinules, is 3,6-times as long as wide, the carpus 1,9-times as long as 

 thick, the propodus with 6 spinules on the posterior margin 5-times as long as wide. The 

 dactylus measures one-third of the propodus, is 2,6-times as long as wide at the base and the 

 dorsal claw is half as long as the ventral or principal one. 



20. Sytialp/ieus paraneomeris Cout. var. praerfabunda de Man. 



Synalplieus paraneomeris Cout. var. praedabundus J. G. de Man, Siboga Exp., Monogr. XXXIXtf 1 , 

 Part II, Family Alpheidae, 1911 (text) p. 240, 191 5 (plates) PI. VIII, fig. 34 — i\c. 



Stat. 240. November 22. Banda Anchorage. Reef. 1 egg-bearing female. 



The rostrum reaches a little beyond the middle of the visible part of i st antennular 

 article and, when measured from the frontal margin, proves to be 2,8-times as long as wide 

 at base; lateral teeth half as long as the rostrum, broadly triangular, with the acute tips a 

 little turned inwards. 



Antennular peduncle four times as long as the 2 nd article is wide; 2 nd and 3 ld joint 

 together nearly one and a half as long as the visible part of the i st ; 2 nd joint a little 

 longer than broad distally. Stylocerite reaching to the middle of 2 nd joint. 



Upper angle of basicerite obtuse, little prominent, lower spine as long as the stylocerite, 

 not shorter; carpocerite 3,54-times as long as wide in the middle, terminal spine of scapho- 

 cerite as long as carpocerite, not shorter. 



Unfortunately the telson is wanting. 



Peraeopods of the i st pair, of which the larger occurs on the left side, like in the 

 specimens from Stat. 129, described in 191 1. Large chela 4 mm. long, fingers 1,12 mm. long, 

 about one-fourth the length of the chela and a little more than one-third of the palm ; palm 

 1,52 mm. high in the plane of the fingers, a little more than one-third the length of the chela, 

 so that the palm appears almost tvvice as long as high. Smaller chela 1,85 mm. long, proportion 

 between the length of both chelae 2,16; fingers as long as the height of the palm in their 

 plane, viz. 0,66 mm., the length of the chela being 2,8-times as long as the fingers and as 

 the palm is high. 



Merus of 2 nd legs 5,12-times as long as wide in the middle; carpal segments long 

 1 mm., 0,2 mm., 0,2 mm., o,iS mm. and 0,44 mm., i st segment 4,54-times as long as thick 

 at the distal extremity; chela 0,85 mm. long, almost twice as long as the 5 th segment, fingers 

 hardly longer than the palm. 



Relative dimensions of the 3 rd leg: merus 2, carpus 1, propodus 1,66; dactylus 0,46 

 (measured from the proximal extremity of the anterior margin to the tip of the ventral hook). 



