90 DE. J. G. DE MAN ON THE P0D0PHTHALM0U8 



same; but it is a little less convex, and the antero-lateral 

 margins are comparatively a little longer than in the Japanese 

 species. In the form and the structure of the front and of the 

 orbits, both species are alike. The front is slightly declivous, 

 straight, and divided by a small median triangular notch into 

 two truncated lobes ; the anterior margin is distinctly trans- 

 versely sulcated, and the two lobes are a little prominent in the 

 middle ; so that the front is perfectly similar to that of Ij. 

 crenata. The internal angle of the upper orbital margin is 

 described by Haswell as being acute ; but in our specimens it re- 

 sembles E. crenata only when the carapace is viewed from above ; 

 when, however, the front orbital region is looked at anteriorly, 

 the internal orbital angle appears obtuse, though transversely 

 carinated. As in Seteroplax, the internal orbital hiatus is 

 occupied by a process of the base of the antennae, so that the 

 flagellum is excluded from the orbital cavity; the flagellum 

 therefore appears in the hiatus between the internal orbital 

 angle and the front, when the carapace is looked at from above. 

 The flagellum is a little longer than half the length of the 

 cephalotborax. The upper margin of the somewhat oblique 

 orbits presents two fissures, one about the middle, and the 

 other near the external angle ; the inferior orbital margin also 

 presents a small hiatus near the external orbital angle. The 

 internal lobe of the infraorbital margin is dentiform, and projects 

 a little more forwards than the internal angle of the upper 

 margin. It is separated by a small emargination from a second, 

 though smaller and less prominent lobe of the infraorbital margin, 

 situated on its interior half. 



The antero-lateral margins are much shorter than the postero- 

 lateral, and are armed with four teeth, including the external 

 orbital angle. These teeth are rather acute and nearly equal, the 

 third being, however, a little longer and slightly more prominent 

 than the others, and the fourth being the smallest of all ; they 

 are all more or less distinctly carinate above. The antero-lateral 

 margins are little oblique, so that the carapace is rather narrow. 

 The external elevated margin of the last antero-lateral tooth 

 extends backwards for a short distance, thus constituting the 

 postero-lateral margin ; but it soon disappears, so that the pos- 

 tero-lateral margin becomes undefined. A little more inwards, 

 however, on each side of the upper surface of the carapace, a 

 ridge-like, longitudinal, somewhat rugose elevation is found, 



