LUPOCYCLUS ROTUNDATUS AD. AND WHITE. 153 



Red sea , that wholly agree with one another. This spe- 

 cies has been recorded by Mr. Heller from Tahiti, and 

 is therefore distributed throughout the whole Indo-Pacific 

 region. The figure given by Mr. Heller is rather incor- 

 rect, and our species is quite distinguished from Dana's 

 Carupa tenuipes by the shape of the front and of the 

 antero-lateral teeth. 



8. Lupocyclus rotundatus Ad. and White. 



Confer : A.lph. Milne Edwards , Etudes zoolog. sur les 

 Portuniens récents, in: Archives du Musee, X, pag. 387. 



The Museum collection contains two beautiful male spe- 

 cimens , collected in the seas of Amboina by Mr. Ludeking. 



The front is much prominent, and presents four de- 

 pressed teeth , except the obtuse , litte prominent internal 

 orbital angles : the two median teeth are more prominent 

 than the two others. The upper surface of the front is 

 minutely granular. The antero-lateral margin is armed 

 with nine teeth, the external orbital angles included: five 

 larger teeth,- between which occur the four intermediate 

 smaller ones ; of the five larger teeth the first , viz. the 

 external orbital angle is the largest, the four remaining 

 are nearly similar to one another; the four intermediate 

 teeth gradually decrease in size, the first, which is found 

 immediately behind the external orbital angle , having the 

 same size as the third of the five principal teeth , the fourth 

 intermediate being scarcely perceptible. The surface of 

 the sternum presents many rugosities. — 



The arms of the chelipedes are much elongate ; their upper 

 surface is provided with many transverse granular rugosities , 

 and with a granulated line near the posterior margin that ter- 

 minates anteriorly into an acute spine on the border of the 

 third and last fourth parts of the arm. Five acute spines occur 

 on the anterior margin of the arm , gradually decreasing 

 in size posteriorly. The wrist is armed with three spines , 

 a larger one on the internal angle and two smaller ones 



Notes from the Leyden ]Museuiii, Vol. V. 



