by Rev. t. R. R. Stebbing. 15 



Family GONOPLACID^]. 



In the above-cited treatise Miss Rathbun observes that " the family 

 Gonoplacidae links the Catoraetopes to the Cyclometopes and is most 

 closely allied to the family Xanthidae." 



Genus EURYPLAX, Stimpson. 



1859. Euryplax, Stimpson, Ann. Lye. Nat. Hist. New York, vol. 



vii, p. 60 [Rathbun]. 

 1900. E., C. G. Young, West Indian Stalk-eyed Crustacea, p. 256. 

 1918. E., Rathbun, The Grapsoid Crabs of America, p. 34. 



Carapace broad, transverse, hexagonal, antero-lateral margins short 

 [very short, Stimpson], dentate, front nearly half as broad as the 

 carapace; ocular peduncles of moderate length ; chelipeds heavy, not 

 very unequal ; all segments of pleon distinct, first narrow and little 

 developed, second widest. 



Some points mentioned by Stimpson are omitted as not distinctly 

 observed in the following species. 



Euryplax bevisi, sp. nov. Plate II. 



From the two species earlier known this is easily distinguished by 

 several characters. The antero-lateral margins have four strong teeth 

 instead of only three, the carapace broadest at the hindmost, with its 

 surface diversified by numerous rows of minute spinules or setules. 

 The strong chelipeds are strikingly furnished with conspicuous rows 

 of granules and projecting spines or teeth. Of teeth there are three 

 on the inner margin of the fourth joint, the fifth has a large one near 

 its inner margin, and two small ones on the outer border ; the hand 

 has two that are lateral. All are conspicuous by their dark tips. 

 The outer border of the strongly curved finger is smooth but trilobed. 



The cutting-plate of the mandible is oval ; on the inner-side it has 

 a sharp oblique ridge. In the robust contiguous third maxillipeds the 

 fourth joint is much shorter than the third has its antero-internal 

 angle deeply incised for the fifth joint. The pecularities of the slight 

 maxillae and second maxillipeds may be judged from the figures, but 

 the other species have not offered material for comparison. The first 

 antennae fold transversely. The fingers of the chelae have dark patches 



