SCHIZOPODA AND CUMACEA 



In my spécimens the antennular flagella are extremely long, as long as the sum of the 

 céphalothorax and the two anterior abdominal segments. The maxillipeds and four anterior pairs 

 of legs are well developed, but the legs of fifth pair are very short, the endopod only as long as 

 the exopod and about as long as the penultimate joint of the maxillipeds. 



Occurrence.— Lat. 69° 5g' S., long. 82° 3g' W., September 3, 1898, plankton ; two 

 spécimens. — Lat. 70 09' S., 82°35'W., November 11, 1898, plankton; one spécimen (type 

 for the figures). 



Distribution. — This species was taken by the Discovery through holes eut in the ice, 

 and has not been recorded from any other expédition. 



C. - - SPECIMENS IN INTERMEDIATE LARVAL STAGES 

 Larvae of Euphausia superba Dana 



(PL I. figs. 4 a — j m . 



From a single station a good number of spécimens of the same species are to hand. The 

 larvae are in four stages, and it is necessary to describe each stage separately. 



Stage A (figs. 40 — 4e). — A spécimen measures 4.5 mm. from the margin of the rostrum 

 to the tip of the telson. The carapace is without posterior dorsal process or marginal teeth. 

 The rostrum is a very large and broad plate (fig. 4 a) with the front margin semicircular ; 

 it covers abouth three-fourths of the inner part of the basai antennular joint. The large 

 eyes are not marked off from the stalk — but the préservation is not good and therefore the 

 aspect given in fig. 4 a is only approximate. The outer part of the distal end of first antennular 

 joint is produced into a very long process reaching to the end of third peduncular joint and 

 armed with numerous spinules along its inner margin. The inner flagellum is considerably 

 shorter than the third joint of the peduncle and longer than the outer flagellum ; both flagella 

 are unjointed and terminate in setae ; several plumose setae are found along the inner side 

 of the joints of the peduncle, especially on the third joint. The antennae hâve both rami 

 subequal in shape and length, each of them about as long as the sum of the two distal joints 

 of the antennular peduncle and terminating in a bundle of long setae. The mandibular palp 

 is a small conical joint. The maxillipeds (fig. 46) hâve the endopod three-jointed, somewhat 

 longer than the exopod but considerably shorter than the broad lamellar basai part of the 

 appendage. Five pairs of legs are somewhat developed : the endopods are nearly sausage-shaped, 

 not very distinctly divided into joints, terminating in a short setae, and about twice as long 

 as the exopods (fig. 4 c) ; the legs hâve a vestige of the branchia at the base ; fifth pair are 

 somewhat shorter than the other pairs which are subequal in length and somewhat shorter 

 than the maxillipeds. Four pairs of pleopods are scarcely as long as the height of their 

 segments ; the exopods are marked off from the peduncles, sausage-shaped, without bristles ; 

 the endopods are still wanting. Fifth pair of pleopods scarcely visible. Sixth abdominal segment 

 a little longer than broad (fig. 4 d). The uropoda scarcely half as long as the telson, far from 

 reaching its latéral spines; the exopod is somewhat longer than the endopod, and both rami 

 are furnished with long setae. The telson (figs. 4 d and 4 e) is three and a half times longer 



