168 PALAEMON ORNATUS. 



as the hands; fingers somewhat shorter than palm. The 

 second pair of legs are a little unequal in size , the right leg- 

 being the larger ; they are shorter than the body , but they 

 agree closely with those of Pal. carcinus Fabr. : carpopodite 

 somewhat longer than the arm , thickened anteriorly and 

 somewhat longer than the palm which is cylindrical and 

 thicker than the thickest part of the wrist; fingers some- 

 what shorter than palm , close to one another and the curved 

 points crossing one another ; the moveable finger covered 

 with coarse hairs except at the end , and armed with two 

 very small teeth at its base , the immoveable finger with 

 only one small tooth that projects between the two teeth 

 of the other. The arm , and more especially the wrist 

 and the hands, covered with numerous short small spines. 

 The fifth pair of legs project with the terminal joint beyond 

 the antennal scale , and are covered with extremely subtile 

 spines. 



The measures of the various joints of the larger leg of 

 the second pair are as follow: arm 40 mm., wrist 52 mm., 

 palm 45 mm., fingers 33 mm. A single specimen has 

 been collected by the celebrated traveller Mr. von Rosen- 

 berg at Andaï in New-Guinea, to whom I have much 

 pleasure in dedicating this new form , which may be distin- 

 guished from Pal. carcinus Fabr., the most nearly allied 

 species , by the form and the structure of the rostrum and 

 the terminal joint of the abdomen. 



Pal a em on o mat us Oliv. 



Milne Edwards, Hist. Nat. t. IL, p. 396. — von Mar- 

 tens, 1. c. p. 36. — Palaemon vagus Heller, Sitzungsber. 

 Wiener Akad. 1862, p. 417, taf. II, fig. 42, 43. Palae- 

 mon longimanus Hoffmann, Crustaces de Madagascar etc., 

 p. 34, pL IX, fig. 68 and 69. 



The Museum collection contains numerous specimens, of 



Notes from the Leyclen AHuseum. 



