REPORT OX THE PHYLLOCARIDA. 25 



to have been rather elongate, in all probability much longer than the peduncle, but the 

 outer part is wanting in both specimens. The preserved proximal part is composed of 

 eight joints, the first of which, as usual, is by far the largest and about as long as the 

 lamellar appendage, whereas the succeeding joints are very short. The bristles, which 

 may have clothed these joints anteriorly, were broken off in the specimen examined. 



The antenna? (fig. 8, a 2 ) are somewhat more slender than the antennula?, and 

 comparatively rather smaller than those in Nebalia and Paranebalia. The peduncle is 

 scarcely longer than that of the antennula? and geniculate at the middle. Its first joint 

 is the largest, irregularly quadrangular in form, and exhibits on the outer side at the 

 base a rounded prominence, slightly overlapping the basal joint of the antennula?. The 

 second joint is, like the first, quite smooth, and has the distal extremity obliquely truncate, 

 forming with the succeeding joint a sharp geniculate bend. The latter joint is considerably 

 more slender than the two preceding, and divided into two segments by a well-marked 

 transverse suture. It is provided along the anterior edge with a number of small slender 

 bristles, forming on the proximal segment a double row. The ilagellum in both specimens 

 is imperfect, the outer part being broken off, but, to judge from the form of the proximal 

 part, it may have been rather elongate and slender. 



The anterior lip (figs. 8, 9, L) projecting posteriorly between the bases of the antenna?, 

 is rather large and almost pentagonal in form, the terminal edge being not, as in the 

 two other genera, emarginate, but on the contrary produced in the middle as an obtuse 

 angle, and without any visible ciliation. 



The mandibles (fig. 8, M) are very small, more so even than in Nebalia and Para- 

 nebalia. The structure of their masticatory part could not be more closely examined, but 

 this part seems to be far less developed than in the genus Paranebalia. The palp (Mp), 

 on the other hand, is very large, almost pediform, and composed of three distinctly defined 

 joints forming angular bends with each other. The basal joint is rather massive, and forms 

 with the succeeding joint apparently a very movable articulation. Both these joints are 

 quite smooth and nearly uniform in size, whereas the terminal joint is considerably smaller 

 and of a narrow elliptical form ; it is moreover strongly compressed, and provided along 

 the posterior edge with a dense row of ciliated bristles, arranged in a combdike manner. 



Of the maxilla? I have only been able to examine the second pair more closely, the 

 first pair being so much damaged in the specimen examined as not to admit of an} 7 

 satisfactory description. The former pair (fig. 10) are very small and look rather 

 dissimilar to those in Nebalia and Paranebalia, whereas, on the other hand, they show 

 an unmistakable resemblance to the maxilla? in certain Copepoda. As in the latter 

 group the inner masticatory lobe is very strongly developed and does not extend in the 

 same plane as the others ; it is, moreover, provided at the free edge with a dense row of 

 strong spinedike bristles, which are ciliated at one of their edges and recurved, so as to 

 form together a dense combdike fan projecting towards the oral orifice. The three other 



(ZOOL. CHALL. EXP. — PART LVI. — 1887.) Kkk 4 



