GONIOSOMA DUBIUM HOFFMANN. 151 



3. Goniosoma annulatum Fabr. 



Confer: Alph. Milne Edwards, in: Archives du Musée, 

 t. X, pag. 374. 



The Museum collection contains six fine specimens (three 

 adult males , three somewhat younger females) from the 

 shores of the island of Amboina , that wholly agree with 

 the quoted description. The distance of the last antero- 

 lateral teeth from one another is in proportion to the 

 length of the carapace as 6 : 4. 



The frontal teeth are flattened and wholly resemble those 

 of Gonios. sexdentattim Herbst, as described by me some 

 time ago (Notes from the Leyden Museum , Vol. I , p. 

 59). In one adult male specimen the upper surface of 

 the carapace and the upper surface of the hands and of 

 the carpopodites and meropodites of the anterior legs is 

 clothed with dense short hairs , but the other specimens 

 are quite smooth. The upper surface of the carapace of 

 our specimens (preserved in spirits) are marked with four 

 spots , two larger pale ones on the branchial regions , and 

 two smaller purplish red ones on the protogastrical lobes , 

 in some small distance behind the front. 



We received still an adult female specimen from the 

 island of Nossy-Faly , near Madagascar , that presents some 

 differences from the Amboina specimens. The last aiitero- 

 lateral teeth are comparatively much smaller in this Nossy- 

 Faly specimen and the frontal teeth are much narrower 

 and separated from one another by much larger intervals. 

 I regard it as a remarkable, perhaps local variety. 



4. Goniosoma dnbium Hoffmann. 



Confer : Hoffmann , Recherches sur la Faune de Mada- 

 gascar , etc. Leide 1874, pag. 11. — de Man, Notes from 

 the Leyden Museum, I, pag. '60. 



This species is undoubtedly identical with Goniosoma 

 oriëntale Dana, as I have found by comparing our speci- 



Notes from the Lieydeu INXuseutn, Vol. V. 



