REPOKT ON THE SCHIZOPODA. 19 



triangular projection, as also two posteriorly curved mucroniform spines, embracing the 

 base of the telson. 



The eyes (see fig. 10) arc comparatively small, and almost wholly covered above by 

 the frontal plate, without, however, being lodged, as it were, within orbital hollows, 

 as in Lophogaster. The cornea occupies a comparatively small part of the eyes, and does 

 not exhibit any appreciable dilatntion; its pigment is dark, and the visual elements are 

 normally developed. 



The antennular peduncle (fig. 1 1 , a') is short and thick, not, however, to such an 

 extent as in Lophogaster. The last joint does not exceed the basal in length, while in 

 Lophogaster it is even larger than the two remaining joints taken together. As in the 

 latter genus, the basal joint is somewhat applanated, and jirojects exteriorly as a pointed 

 lappet. Of the flagella, the inner is very small, scarcely more than lialf as long as the 

 peduncle, and composed of rarely more than ten short articulations. The outer 

 flagellum, too, would seem to have been much more strongly developed, but its length 

 cannot be exactly stated, the terminal part having been broken off in the specimen examined. 



The basal part of the antennse (see fig. 11) is thick and highly chitinised, forming 

 on the externa] side a keeled prominence. The terminal part (a^) is of the same 

 structure as in Lophogaster. On the other hand, the scale (fig. 11, .<<q; fig. 12) 

 exhibits a totall)' different and very peculiar appearance. It is almost twice as long as 

 the antennular peduncle, and has the form of a very narrow, strongly chitinised, and 

 somewhat flexuous plate, without any trace of the usual marginal bristles, but jDrovided 

 with several strong angular projections. The exterior part of the plate is rather 

 prominently curved outwards and somewhat dilated at the apex, which projects in two 

 acute angles, the one pointing straight forward, the other recurved in the shape of a 

 hook. In the middle, the inner edge of the plate forms a similar recurved projection, and 

 in front of this may be observed another short angular prominence. As regards both 

 form and structure, this scale is wholly dissimilar to anything obsei'ved in other known 

 Podophthalmia, and hence it undoubtedly represents one of the features most characfer- 

 . istic of the genus. 



Concerning the oral parts, they would appear, on the whole, so far as they admit of 

 being examined in the only specimen obtained, to agree with those in Lophogaster. 

 Viewed from below (fig. 11), the following parts may be more or less distinctly observed 

 within the comparatively very broad buccal area ; anteriorly, on the median line appears 

 the galeate anterior lip {L), and on each side the mandibles {M), with their palps (/>), 

 which are very elongate and slender ; posterior to the mandibles are the maxilLi?, of 

 which, however, only the second pair admit of being partly examined, their exognaths 

 (jni?) being wholly exposed and rather large, elliptic, and fitting into a semicircular 

 opening, that leads to the branchial cavity ; they are as usual fringed with a row of 

 strong ciliated bristles. The maxillipeds (mp) marking off posteriorly the buccal ;irea, 



