THALAMITA PÜISSONI 181 



little convex, the aiitero- and posterolateral parts being 

 however deeper and more concave; the whole surface, but 

 especially the said lateral parts are hairy and the elevated , 

 minutely granulated lines of the surface are very promi- 

 nent. The median very large frontal lobes have a somewhat 

 emarginated anterior margin and the external lobes are 

 placed a little before the median ones, with a nearly 

 straight margin, almost as long as the latter. The five 

 lateral teeth of the carapace are all acute, the fourth 

 is a little shorter than the others. The crest of the basal 

 joint of the external antennae is provided with a row of 

 very short, tolerably sharp small teeth. 



The upper margin of the arms hi granular; the wrist 

 is armed , besides with a very sharp spine at its inner angle , 

 with three smaller spines on its upper surface , which is 

 also provided with some granules and elevated lines and 

 is a little hairy. The hands are of a nearly equal size , 

 their upper surface is armed with six sharp spines , 

 placed in two rows and alternating with one another, 

 and the outer surface is provided , besides with the elevated 

 granulai ridge near the lower margin which proceeds upon 

 the immobile finger , with two equally granular crests 

 on its outer surface; between these crests some granules 

 may be seen and the surface is hairy. The convex inner 

 surface of the hands is granulated and hairy near its upper 

 margin and provided with two rows of minute granules 

 on the middle ; the fingers are ornamented with a black 

 spot before . the pale tip. — The penultimate joint of 

 the posterior ambulatory legs is armed with many very 

 small teeth , the meropodites are provided with a hairy 

 groove. — Our specimen is of a purplish red colour , 

 with little yellow spots on the margins of the carapace, 

 which is also of a paler colour at its under surface. — 



16. Thalamita poissoni Aud. 

 Audouin, Egypte, Crustacés de Saviguy, PI. IV, fig. 3. 



The collection contains three fine male specimens of this 



jNotos irom the Leyden ]Museiiiu, "Vol. II. 



13 



