28o 



of the second and third legs and of the telson of the specimen from Saya de Malha are 

 indicated in the Tables sub N° 6; they much agree with those of Syn. bituberculahis, but the 

 propodus of the third legs is shorter with regard to the other joints and appears therefore 

 of a stouter shape because the absolute width is the same. 



t 33- Synalpheus bispiuostis de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI. 1910, p. 302. 



Stat. 33. March 24/26. Bay of Pidjot, Lombok. 15 — 22 m. Mud, coral and coralsand. 1 male 



and 1 ova-bearing female. 

 Stat. 240. November 22 till December 1. Banda-anchorage. From 9 — 36 m. Lithothamnion- 



bank in 18 — 36 m. 1 very young specimen. 



A new species of the Bitmgtiiculattis group, closely related to Syn. biwiguiculahcs 

 (Stimpson) Cout., variety cxilipes Cout., but distinguished from all other species of this genus 

 by the posterior margin of 6 th abdominal somite being b i s p i n o s e. 



Frontal spines in the male from Stat. 33 as in the quoted species (H. Coutière, Alpheidae 

 Mald. and Laccad. Archip. 1905, PI. LXXI, Fig. 10), but the rostrum less si en der, 4-times 

 as long as wide in the middle and shorter with regard to the length of the visible part of 

 first antennular article, not yet quite reaching to the middle of that part. Lateral teeth and 

 the notches separating them from the rostrum as in the variety exilipcs Cout., the lateral teeth 

 barely shorter than the rostrum and with the tips rather obtuse ; the outer margins of the lateral 

 teeth are very slightly concave and clearly directed inward. 



Antennular peduncle 4, 4-times as long as wide at the distal extremity of median article; 

 the visible part of first article, the second and the third are in proportion to one another as 

 7:4:3, just as in Syn. bumgiiiailatus (Stimpson) Cout. (H. Coutière, 1. c. Fig. 8) ; stylocerite 

 reaching to the 2 nd fourth part of median article. 



Carpocerite 5-times as long as wide in the middle, projecting beyond the antennular 

 peduncle by the whole length of third article. Terminal spine of scaphocerite hardly longer 

 than the antennular peduncle, shorter than the carpocerite and extending by one-third of its 

 length beyond the narrow scale that reaches to the 2 nd third part of distal antennular article. 

 Lateral spine of basicerite slender, nearly as long as the stylocerite, spine at the upper angle 

 well developed, measuring one-third the length of the lateral. 



In the female from the same station which is of a somewhat smaller size, the rostrum 

 appears a little more slender than in the male, 5-times as long as wide in the middle and it 

 reaches to the distal third of the visible part of first antennular article; the rostrum is also 

 slightly longer than the lateral teeth. The antennular peduncle is 4-times as long as wide at 

 the distal end of median article, the visible part of the first is but one and a half as long 

 as the second and the second hardly longer than the third ; the stylocerite extends to the 

 2 nd third part of median article and the scale of the scaphocerite almost to the middle of the 

 third. Carpocerite 5-times as long as wide, terminal spine of scaphocerite and spines of the 



basicerite also like in the male. 



■ 



In the very young specimen, long 7 mm. from Banda, the rostrum resembles that of 



148 



