i8 



thick at the distal end; propodiis with five spinules besides the two at the distal end. Dactylus 

 almost half as long as the propodus, the proportion being like 16:35,5; they resemble those 

 of the 3"^ pair. Fifth legs lost. 



The slight differences as regards the measurements, when compared with those of the type,, 

 are probably owing to the younger age of this specimen or they are individual. 



General distribution: South coast of Timor (de M.\n). 



14. Aihanas Stebbingii de Man. Tl. II and III, Fig. 10 — 10/. 



Athanas Stebbingii ]. G. de Man, in: Zoolog. Mededeelingen uitgeg. vanwege 's Rijks Museum 

 V. Nat. Hist, te Leiden. 1920. Dl. V, afl. 3, p. 106. 



Stat. 323. February 24 25. Sangkapoera-roads, Ba\vean-i.sland. 12 m. Bottom mud. i egg- 

 bearing female. 



A new species of the Diniorphus-gxowY, which I had the honour to dedicate to the 

 author of the series of interesting and valuable papers on the carcinological Fauna of South 

 Africa and who at the age of 87 is still continuing his researches with youthful zeal and 

 diligence. This species, closely related to A. dimorphus Ortm. and also to the female of the 

 remarkable A. polytnorphus Kemp of the Chilka Lake, is of a smaller size than these two, being; 

 only 9,66 mm. long from tip of rostrum to tip of telson : the carapace is 3,7 mm. long, the 

 abdomen 5,96 mm. The triangular acuminate rostrum (Fig. 10), that reaches about to the distal 

 extremity of the 2'"' joint of the antennular peduncle, measures one-third the rest of the carapace 

 and projects by more than half its length beyond the eyes; the rostrum is sharply carinate 

 above, the carina ends, however, at the base; the lateral margins are also sharp, they do not 

 reach, however, to the tip, fading away at the anterior fourth, and the height of the rostrum,, 

 in a lateral view, is nearly Y7 the length. Supra-corneal teeth wanting. Extra-corneal spine acute,, 

 reaching to the middle of the eyes. Infra-corneal angle rounded, reaching almost as far for- 

 ward as the extra-corneal spine. Anterolateral angle of the carapace rounded, unarmed. 



Abdomen about one and a half as long as the carapace, the telson, respectivelj- the 

 rostrum included; abdominal pleura with their inferior margin straight, rounded posteriorly,, 

 except that of the 5"' somite, which is acutely pointed, while the infero-posterior angle of the 

 6'*' is articulated and also acute. Telson (Fig. loa) 1,16 mm. long, measuring one-fourth the rest of 

 the abdomen, i^i-times as long as the greatest width at base, while the distance between the 

 postero-lateral angles is nearly half the width proximally. Dorso-lateral spinules implanted near 

 the lateral margins that are almost straight, those of the anterior pair, 0,11 mm. long, just 

 before the middle, those of the posterior, 0,12 mm. long, at the posterior third; posterior 

 margin rounded, slightly prominent, the inner of the two pairs of spinules 0,2 mm. long, the 

 outer 0,08 mm. Basal joint of uropods bispinose posteriorly, the outer spine 5-times as long 

 as the inner. Uropods of equal length, slightly longer than the telson without the terminal 

 spinules, but reaching as far backward as the latter; like in A. polymorphus Kemp there is- 

 a fringe of feathered setae on the under side of the exopodite, close to and parallel with the 

 straight outer margin; the outer margin of the endopodite, that is a little less broad, appears, 

 in the middle a little concave, anteriorly a little convex. 



I 



