4i 



middle, the carpus 3,4-times as long as thick at the distal extremity, while the relative measure- 

 ments are: merus 2,2, carpus 1, propodus 1,45, dactylus 1. 



The younger female bears still one leg of the 4" 1 pair. The merus is 5-times as loncr 

 as broad, the carpus 4-times as long as thick at the distal extremity and the relative measure- 

 ments are the following : merus 1,82, carpus 1, propodus 1,46, dactylus 0,9. 



Ova 0,26 — 0,28 mm. long, a little less broad. 



The type-specimens of Alpheits lepidus were obtained in Madura-bay and in Kwandang- 

 bay-entrance. 



32. Alphen s Bastardi Cout. 



Alpheus Bastardi H. Coutière, Alpheidae Mald. and Laccad. Archip. 1905, p. 907, PI. LXXXV, 

 fig- 45—45^- 



Stat. 172. August 26— 28. Gisser, anchorage between this island and Ceram-Laut. Reef. 

 1 ova-bearing female. 



This female is 17,5 mm. long from apex of rostrum to tip of telson. The acute rostrum 

 that projects by more than half its length beyond the rounded orbitae, is 0,22 mm. long and 

 reaches, the visible part of i st antennular article being 0,56 mm. long, about to the second 

 third part of the latter. There is no tracé ofa rostral carina. Telson 1,95 mm. long, 

 width anteriorly 1,12 mm., distance between the postero-lateral angles 0,6 mm., so that it is 

 more than 3-times as long as this distance ; anterior pair of dorso-lateral spinules implanted 

 before the middle, the distance from the posterior margin being 1,12 mm., posterior pair just 

 midvvay between the anterior pair and the posterior margin. As regards the antennal and 

 antennular peduncles and the scaphocerite, this specimen agrees with Coutière's figure 45, but 

 the terminal spine of the scaphocerite, that projects a little beyond the apex of the lamella, 

 extends as far forward as the antennular peduncle. Spine of basicerite very small. 



The large cheliped is wanting, the small one on the right side. Infero-internal margin 

 of the merus with a small acute tooth at the distal extremity and with 3 or 4 movable 

 spinules at unequal distances. Chela 4,9 mm., palm 2,4 mm., fingers 2,5 mm. long, the palm 

 1,18 mm. high; fingers a trifie longer than the palm, closely shutting together, paim twice 

 as long- as high. 



The carpal segments of the right leg of the 2 ml pair are 1,36 mm., 0,75 mm., 0,34 mm., 

 0,32 mm. and 0,6 mm. long, the chela 1 mm. (palm 0,46 mm., fingers 0,54 mm.); for the 

 left leg these numbers are in the same succession: 1,35 mm., 0,72 mm., 0,36 mm., 0,3411111:., 

 0,6 mm., the chela 1,04 mm: (palm 0,48 mm., fingers 0,56 mm.). The i st segment appears in 

 the right leg 1,8-, in the left 1,87-times as long as the 2 nd , according to Coutière the pro- 

 portion should be 2. 



The merus of the 3 rd peraeopods is 4,66-, that of the 4 th 4,8-times as long as broad 

 in the middle. 



The two nearest allied species are A. leviusculus Dana (J. G. de Man, 1. c, 191 i (text), 

 p. 411, 1915 (plates), PI. XXIII, fig. 98 — 98^) and A. microrhynchus de Man (J. G. de Man, 



SIBOGA-EXrEDITIE XXXIX a*. 6 



