342 ON SOME NEW GENERA AND SPECIES OF AMPHIPODA. 



I have named this species after Mr. John Brazier, C.M.Z.S., 

 from whom I obtained my first specimen. 



Genus Cyrtophium, Dana. 



Cyrtophium dentatmn, sp. nov. (PL XXII., fig. 5.) 



Male. — Two last segments of the pereion, and two first of the 

 pleon projecting in the form of a tooth in the middle dorsal line. 

 Superior antennae as long as the cephalon and pereion ; first 

 segment of the peduncle short, second and third twice as long, 

 subequal, fringed below with long slender hairs ; a short, bi- 

 articulate appendage ; flagellum rather shorter than the last 

 segment of the peduncle, sex-articulate. Inferior antennae rather 

 longer than the body ; first segment of the peduncle short, stout ; 

 second twice as long ; third the longest ; fourth not half the length 

 of the third and slender ; flagellum scarcely as long as the last 

 segment of the peduncle, sex-articulate. Anterior gnathopoda 

 small, with the carpus and propodos subequal, the latter sub- 

 triangular, the palm nearly longitudinal, straight ; dactylos armed 

 •nternally with a few acute teeth ; meros, carpus, and propodos 

 with a few slender hairs. Posterior gnathopoda much larger 

 than the anterior ; meros with an acute spine on its posterior 

 border ; carpus small ; propodos long-ovoid, palmar border armed 

 with three prominent teeth, and fringed with numerous slender 

 hairs ; three setif erous notches on the dorsal border. Two anterior 

 pairs of pereiopoda subequal, bordered with setae ; three posterior 

 pairs subequal, longer than the others, setif erous ; basa long- 

 ovate ; dactyla large. Fourth and fifth pairs of pleopoda with 

 the rami unequal — the inner the longer — each armed with a few 

 straight spines. Last pair of pleopoda rudimentary with one or 

 two setae, almost concealed by the telsony'' Telson prominent, 

 conical, armed terminally with two slender spines. Colour grey 

 or red. Length 2£ lines. ^ 



Sal. Clark Island, Port Jackson. 



