90 CHARLES CHILTON 



These specimens agree very closely with the figures and description given 

 by Sars for Podocerus falcatus (1894, pi. 212) as regards the males and also 

 the females. The tube marked »0n a buoy in Cumberland Bay,» contains a 

 great many specimens, mostly young, though there are a few fully developed 

 males and females. Among the young males are several showing some of the 

 stages in the development of the adult characters, all of which can be paral- 

 leled by specimens obtained in similar situations in New Zealand. The species 

 is very widely distributed both in northern and southern seas and includes a 

 number of forms towards the full life history of which notable contributions 

 have been made by Mrs. E. W. Sexton of Plymouth. 



Caprella cornuta Dana. 



Caprella cornuta Dana, 1853 — 55, p. 816, pi. 54, figs. 5 a — g. 



Locality. 



Masatierra, Cumberland Bay, 20 — 25 m., 6. XII, 16. No. 53. Several 

 specimens, males and females, the longest being about 10 mm. long. 



These specimens agree well with the description given by Dana and must 

 I think be referred to his species. The following appear to be the important 

 characters. The head bears a well marked acute tooth projecting foi wards and 

 a little upwards. The second gnathopod of the male (fig. 4, C) is somewhat 

 elongated with the propod oblong, the palm nearly straight, defined by an 

 acute tooth, having another acute tooth a little distal of the middle of the 

 palm, followed by a truncate projection with minutely crenated edge near the 

 base of the finger. In an ovigerous female the second gnathopod (fig. 4, B) 

 has a similar shape but is somewhat smaller and the acute tooth near the 

 centre of the palm is absent or only very slightly represented. In both sexes 

 the basal joint is fairly long and has the upper margin produced into a thin 

 flange which projects at the distal end in a subacute tooth. The branchiae 

 are narrow-elliptical. 



In addition to the points already mentioned the specimens agree with Dana's 

 fuller description of minor points. The upper antennae are fairly long and 

 have the flagellum composed of nearly 20 joints, the first three or four of 

 which are united into one as described by Dana. The inferior antennae are 

 about as long as the flagellum of the upper, the two-jointed flagellum being 

 equal in length to the preceding joint. The first gnathopod (fig. 4, A) is about 

 the same in male and female, and has the propod somewhat triangular, the 

 palm occupying the whole of the posterior margin, slightly convex and fringed 

 with long setules, a few setules arising also in a row parallel to the anterior 

 margin. In some specimens examined the third and fourth segments have the 

 pleura produced downwards into a prominence similar to that mentioned by 

 Dana except that is not quite so regularly oblong, being deeper posteriorly. 



The species also shows a very close resemblance to Coprclla dentaia 

 Haller as described by Mayer in 1882, the gnathopods being apparently in 



