2 73 



Syu. Pau/sou i Nob., together with the subspecies described by Coutière, may be 

 distinguished by the terminal spine of the scaphocerite projecting beyond the carpocerite ; 

 Syn. Paulsoni Ramestvarensis and the typical Syn. Paulsoni differ, moreover, by the lateral 

 spine of the basicerite being shorter than the outer margin of the basal portion; Syu. Paulsoni 

 liminaris bv the upper angle of the basicerite bearing no spine, whereas, like in Syn. Paulsoni 

 Senegambiensis, the carpocerite has a more slender form. The carpocerite of Syn. Paulsoni 

 Kurrachccusis, finally, is 2,75-times as long as wide. 



IV. Biunguiculatus group. 



f30. Synalpketis biunguiculatus (Stimpson) Cout. 



Synalpheus biunguiculatus (Stimpson) H. Coutière, in: Alpheidae Mald. and Laccad. Archip. 



1905, p. 873, PI. LXXI, Fig. 8. 

 Nee: Alplicus biunguiculatus J. G. de Alan, in: Archiv f. Naturg. 53. Jahrg. 1887, p. 502, 



Fig. 6 and da. 



Stat. 64. May 4 '5. Kambaragi-bay, Tanah-Djampeah. Depth up to 32 m. Coral, coralsand. 

 1 ova-bearing female. 



Stat. 282. January 15/17. 8°2s'.2S., i27°i8'.4E. Anchorage between Nusa Besi and the N.E.- 

 point of Timor. 27 — 54 m. Sand, coral and Lithothamnion. 1 male and 1 ova- 

 bearing female. 



Stat. 299. January 2729. lO°52'.4S., I23°i'.iE. Buka- or Cyrus-bay, South coast of Rotti- 

 island. Depth up to 36 m. Lithothamnion. 1 ova-bearing female. 



It is with some doubt that these specimens are referred to Syn. biunguiculatus (Cout.), 

 not only because in Coutière's description no measurements at all are indicated, but also 

 because in all these specimens the large cheliped is missing. 



In the male from Stat. 282, long 13,5 mm., the frontal and the antennal region closely 

 accord with Fig. S of Coutière's paper: the rostrum is 4,4-times as long as wide in the middle, 

 just as long as the triangular, obtusely-pointed, lateral spines and reaches just to the middle 

 of the visible part of first antennular article. 



The antennular peduncle is 4,5-times as long as wide at the distal extremity of median 

 article, this article one-third longer than wide distally ; the visible part of basal article is one and 

 a half as long as the second, the third one-fourth shorter than the second. Carpocerite five-times 

 as long as wide, surpassing the antennular peduncle by the whole length of third article ; the 

 two spines of the basicerite are as long as in Fig. 8, but slightly curved outward at their tips. 

 The scale extends to the apex of median article, the terminal spine almost to that of the third, 

 but the free part of the scale extends farther backward than in Fig. 8. namely almost to the 

 middle of the visible part of basal article. 



The specimens from the stations 64 and 299, which are iS mm. and 15 mm. long, fully 

 accord with the described one, but in the female, long 13 mm., from Stat. 282 the rostrum and 

 the lateral spines agree with Fig. 9 of Coutière's paper, which represents Syn. pachymeris . 



For the measurements of the telson I refer to table A, which indicates that the telson 

 presents nearly the same dimensions in the male and in the female from Stat. 282, though 



141 



