PODOPHTHALMOUS CRUSTACEA. 59 



Breadth of carapace of the male 40 m.m. 



Length » » 24 m.m. 



Breadth » of the female 54 m.m. 



Length » » 31 m.m. 



Epixanthus dilatatus may be distinguished from Epix. 

 frontalis M, Edw. by its more convex carapace and its 

 antero-lateral margins being divided into five teeth. 



6. Goniosoma sexdentatum Herbst. 



Herbst, Krabben und Krebse, pi. VII, fig. 52. Alph. 

 Milne Edwards , Arch, du Mus. X , p. 372. 



The Leyden Museum is in possession of two beautiful 

 males of this species, collected at the island of Amboina. 



Breadth of the carapace of the larger specimen 97 m.m. 

 Length » » 66 m.m. 



This species is closely allied to and has quite the facies 

 of Goniosoma natator Herbst, which lives in the same seas , 

 but it may be distinguished by the following characters: 



The six teeth of the antero-lateral margin are altogether 

 spiniform with a black point, except the second tooth 

 which has an uncolored point. The last or sixth tooth is 

 not larger in adult specimens than the other but is quite 

 similar to them. There are no granular ridges on the upper 

 surface of the carapace behind the long granulated line which 

 unites the two posterior teeth of the lateral margins ; this line 

 itself has a much more sinuous course in our species than in 

 Gon. natator Herbst, the carapace of which is ornamented with 

 a twice interrupted ridge behind the said line. In Go7i. 

 natator Herbst on the contrary, the two anterior teeth of 

 the lateral margins are blunt and truncated; nor is 

 the third tooth, the largest of all, acute, but the three 

 posterior ones alone are spiniform , and the last tooth is 

 smaller than the other ones. The meropodites and carpopo- 



Notes from the Leyden M.ixse\xiw. 



