276 ON AUSTRALIAN AMrillPODA. 



anterior border. Third pair very slender, equal to the first in 

 length. Fourth and fifth pairs sub-equal, of the same length as 

 the second, but stouter ; a few spines on the carpus and propodos. 



Length about seven lines. 



Hub. Port Jackson. 



Genus Pkotella, Dana. 



Protella australis, sp. nov. (PI. XIL, fig-. 4.) 



Cephalon armed above with a single short, anteriorly-directed 

 spine. Superior antennae nearly as long as the body ; peduncle 

 stout ; the second joint the longest ; flagellum as long as the last 

 segment of the peduncle. Inferior antennae as long as the first 

 two segments of the peduncle of the superior pair ; flagellum very 

 short. First pair of gnathopoda with the propodos sub-triangular, 

 broad at the base, which is nearly straight, with straight, gradually 

 converging lateral borders ; dactylos more than two-thirds of the 

 length of the propodos. Posterior gnathopoda with the propodos 

 longer than the cephalon, oval ; palmar border armed with a 

 fringe of hairs and with two strong conical teeth near the apex 

 and another near the base. Posterior pereiopoda sub equal ; 

 propodos with a tooth on its anterior border. 



The form of the posterior gnathopoda , varies in different 

 individuals, and the cephalic spine is sometimes rudimentary. 

 The female of this species differs from the male only in possessing 

 the ovigerous plates. 



Length seven lines. 



Ilab. Port Jackson. 



Grenus Caprella, Lam. 

 Caprella tenuis, sp. nov. (PI. XIL, fig. 5.) 



Cephalon elongated, the upper border terminating anteriorly 

 in an inconspicuous acute tooth. First segment of the pereion 

 longer than, second and third sub- equal with, the cephalon ; the 



