356 Transactions. — Zoologij. 



The legs of the fotirtli pair are l-brancbed. Branch ap- 

 parently 2-jointed, with the second joint bent nearly at right 

 angles to the first. On magnifying it, however, more strongly, 

 this terminal joint is itself seen to be 3-jointed : the first and 

 second of these smaller joints each end in a spine on the 

 outer margin, while the last bears 3 spines at the extremity. 

 All three joints are fringed on their outer margin by a comb- 

 like row of fine teeth. Perhaps this 3-jointed part is really 

 the branch, the preceding segment being the elongated basal 

 joint. At any rate, in figures of numerous species given by 

 Kroyer this character is very persistent. 



The caudal lavielke are very long and slender, many times 

 longer than they are broad. Their anterior part, for over a . 

 third of their length, is much broader than the posterior two- 

 thirds. Each is furnished with several short spines, especially 

 near the extremity. The last abdominal segment also bears 

 two s]3ines on the median line, which mark the position of the 

 anus. 



The total length of the animal, to the extremity of the 

 caudal lamellae, is 12-13mm. 



Hah. Found, along with Penclla, on a sword-fish, Histio- 

 j)horus herschclii. (Otago Museum.) 



Genus Nogagus, Leach. 



1. Nogagus clongatus, Heller (" Eeise der ' Novara :' Crus- 

 tacea," vol. ii., p. 206; pi. xx., fig. 6). 



This species, which is fully described and figured in detail 

 by Heller in the report of the Crustacea collected during the 

 voyage of the Austrian frigate " Novara," is probably, as he 

 suggests, the male of Pandariis dcntatus, having been taken 

 along with that species from a shark caught at Auckland. 

 Indeed, it is almost certain that the genus Nogagus consists 

 only of the males of the various forms, of which the females 

 are described under the generic names of Pandarus, Echthro- 

 galeus, &c. 



2. Nogagus validus, Dana (?). 



This species is recorded by Dana as taken from a shark, 

 north-east of New Zealand. The following is the brief de- 

 scription given : — 



"Carapace a little oblong, oval; second segment with the 

 sides prolonged backwards, third and fourth transverse, sub- 

 equal, half as wide as carapace. Feet of second pair very 

 short, cheliform, inniiovable ; finger short, truncate, movable 

 finger obtuse. Abdomen 2-jointed, anterior segment sub- 

 quadrate. Posterior angles a little prominent, second seg- 

 ment short, transverse, the angles obliquely truncate. Caudal 



