315 



A new species of the group ,^dimorphus." Rostrum triangular, 

 carinate, acuminate, reachiüg to just beyond the extremity of 

 median antennular article. Supra-corneal spine wanting, extra- 

 corneal spine as long as the eyes, infra-corneal spine also well 

 developped. Antennal region as in A. Naifaroensis Cout., median 

 antennular article slightly longer than thick, scale of scaphocerite 

 a little longer than antennular peduncle. Telson 4,2 times as long 

 as the posterior margin is wide, anterior pair of spinules a little 

 before the middle; angles of posterior margin not prominent. 

 Chelipedes in the male unequal, the larger closely resembling 

 that of A. djihoutensis (Coutière, Alpheidae Mald. and Laccad. 

 Archip. p. 857, Fig. 129e), the fingers gaping, but the immobile 

 finger armed with a strong, compressed tooth, reaehing to near 

 the tip, dactylus strongly curved, with a tridentate, longitudinal 

 lobe near the base and with three very small, conical teeth on 

 the distal half. Ischiopodite in both legs with 6 movable spinules 

 on the upper margin. Carpus of equal shape in both legs, very 

 short, almost globular. Small ehela like the larger, but the fingers 

 shut close together and are finely denticulate. Chelipedes of the 

 female similar to the smaller of the male, but the meropodite a 

 little broader. 



Second, third and fourth earpal segments equal, slightly longer 

 than thick. 



Relative dimensions of 3rd pair: Meropodite 2, carpus 1, 

 propodite 2,18. Meropodite 6 times, propodite 9,6 times as long 

 as wide; dactylus '/s o^ ^^^ propodite, slender, 6 times as long 

 as broad at its base, biunguiculate, the ventral accessory hook 

 half as long as the other, and half as broad at its base. Fourth 

 and fifth legs also biunguiculate. 



Length 8,5 mm. 



29. Athanas parvus, n. sp. 



Station 285. Lat. 8° 39'. 1 S., long. 127° 4'. 4 E. Anchorage 

 South coast of Timor. Depth 34 M. 



A new species of the group ^jiiüescens" , closely related to A. Granti 



