82 DE. J. G. DE MAN OS THE PODOPHTHALMOTJS 



glabrous and smooth. The upper surface is armed with five 

 spines, two along the inner margin (viz. one in the middle and 

 one above the articulation of the mobile finger), and three along 

 the external margin, viz. one at the articulation with the wrist, a 

 second a little beyond the middle, and the third above the 

 articulation of the mobile finger. The shape, structure, and 

 armature of the fingers are quite similar in both species. 



The ambulatory and the natatory legs wholly resemble those of 

 G. cruciferum, and consequently the meropodites of the natatory 

 legs are very broad and sulcate, the propoi'tion of their length and 

 breadth being as 6 : 4, and the grooves on their upper (outer) 

 surface are hairy. The penultimate joint presents the same 

 elongated form, and its posterior margin has only traces of two 

 or three minute teeth. As regards the shape of the male abdo- 

 men, both species perfectly agree with one another. 



G. ajffine may therefore be distinguished from G. cruciferum 

 (1) by its smaller size, (2) by the difi"ereut shape and form of the 

 first antero -lateral tooth, (3) by the internal suborbital lobe being 

 much more prominent, (4) by the presence of three longitudinal 

 crests on the outer surface of the hands. 



Toung specimens of G. cruciferum have, however, still to be 

 examined in order to ascertain whether they present the same 

 characters as the adult. 



G. ajfine, Dana, is a rare species, which has hitherto been 

 recorded only from the seas of Singapore. 



Besides the well-known G. cruciferum, Fabr., and G. natator, 

 Herbst, there is still a fourth species of Goniosoma, in which the 

 first antero-lateral tooth of the carapace is truncated and slightly 

 excavated, namely, G. miles, de Haan, from the Japanese seas. 

 This species, however, differs from G. affine (1) in its larger size, 

 (2) by its narrower cephalothorax, (3) by its more acute frontal 

 teeth, and especially (4) by its more elongated anterior legs, the 

 nierus-joints of which are armed with four strong teeth ante- 

 riorly, and by its hands having their outer and under surfaces 

 covered with minute granules and squamose granular lines. 



58. GrONIOSOMA MEEGUIENSE, n. sp. (PI. V. figS. 3 & 4.) 

 ? Synon. : Goniosoma spiniferum, Miers, Report on the Zoological Col- 

 lections made in the Indo-Pacific Ocean during the Voyage of H.M.S. 

 'Alert; 1884, p. 233, pi. xxiii. fig. C. 



A thorough revision of the genus Goniosoma is much needed, 



