EEPOET ON THE SCHIZOPODA. Ill 



The caudal segments are quite smooth above, and provided with comparatively rather 

 small, rounded epimera. The last segment somewhat exceeds in length the preceding, 

 and does not exhibit any trace of a preanal spine. 



The eyes (see figs. 2 and 4) are remarkably small, incompletely developed, and do not 

 in the least project beyond the sides of the carapace. The pedicle is narrow cylindrical, 

 but expands at the end, above, as a knob-like prominence. The cornea occupies only a 

 small part of the eye, and is distinguished by its light, whitish pigment, as also by the 

 surface exhibiting no true corneal facets or other visual elements, but merely an 

 indistin(jt and ii-regular areolation. 



The antennular peduncle (figs. 5, 6) is remarkably short and thick, with the basal 

 joint somewhat flattened, and about as large as the other two taken together ; moreover, 

 it juts out above at the end, somewhat interiorly, as a pointed process, bearing on the 

 inner edge a row of stiff incurved bristles (see fig. 6). The flagella were broken off in the 

 specimens examined, but would seem to have been ratlier elongate, judging from the 

 thickness of the still remaining basal part, more especially of the outer flagellum. 



The antennal scale (fig. 7) about equals in length the antennular peduncle, and exhibits 

 an oblong-ovate form, the apes being broadly rounded and somewhat oblique, with the 

 outer corner not in the least projecting, and armed with a very minute denticle. The 

 basal spine is likewise very small, nearly obsolete, Avhereas the peduncle of the flagellum 

 is very strong, reaching to the tip of the scale. Tiie terminal part of the flagellum was 

 broken ofi" in the specimens examined, but may no doubt have been very elongate. 



The anterior lip (fig. 8) is comparatively large, and has the lateral corners a good 

 deal projecting; for the rest, it shows the stucture characteristic of the family. 



This will also apply to the posterior lip (fig. 9), the terminal lobes of which have the 

 usual triangular form. 



The mandibles (figs. 10, 11) are very strong, with the masticatory part considerably 

 expanded, securiform, and scooped out a little anteriorly. The cutting edge is sharpened 

 and exhibits a small number only of scattered teeth, somewhat difierently arranged on 

 the two mandibles (see fig. 10). The palp is comparatively very large, fully equalling the 

 mandible itself in length. Of its joints, the middle one is by far the largest, and rather 

 broad, as also fringed along both edges with strong ciliated bristles. The last joint is 

 oblong, and furnished along the inner edge with a double series of bristles. 



The maxillae (figs. 12, 13) exhibit a structure very different from that observed in 

 any hitherto known form of Euphausiidee, and would thus fully warrant the generic 

 distinctness of the present form. 



The first pair of maxillae (fig. 12) have the two masticatory lobes very unequally 

 developed, the posterior lobe forming merely a broad, . larhellar expansion of the basal 

 part, fringed along the edge with a dense row of plumose setge, whereas the anterior lobe 

 jDrojects very considerably, and is dilated into a somewhat securiform apex, which is 



