BY WILLIAM A. HASWELL, M.A., B.SC. 345 



series of very long, slender, non-ciliated "hairs. The propoclos is 

 of a clavate form, and furnished at the extremity with a dense 

 fasciculus of hairs similar to those on the carpus ; almost concealed 

 amongst these is the slender, pointed clactylos, which equals the 

 propodos in length. The two first pairs of pereiopoda are large 

 and prehensile in the male, the propodos being short and broad, 

 with a deeply excavated, spine-armed palm, and the dactylos 

 stout and long. The mode of locomotion when the animal is 

 removed from the water resembles that of the terrestrial Isopoda. 



The present species lives in colonies on the surface of calcareous 

 sponges (particularly Veluspa polymojphaj, growing in a fathom 

 or two of water in Port Jackson. The surface of the body and 

 limbs is covered with numerous minute red or grey spots. 



Gemis incertcd sedis. 



Grenus Polychekia. (novum.) 



Pereion broad; pleon compressed, more or less carinate. 

 Antennae sub-equal; superior pair without an appendage. 

 Mandibles exappendiculate. Maxillipedes with well-developed 

 squamiform process. Grnathopoda small, sub-chelate. Pereiopoda 

 all prehensile, with narrow basa. Posterior pleopoda biramous 

 with equal rami. Telson double. 



Polycheria tenuipes, sp. nov. (PL XXIL, fig. 8.) 



Eyes very large, red. Superior antenna as long as the cephalon, 

 and first six segments of the pereion ; first joint of the peduncle 

 short and stout ; second longer and narrower than the first ; third 

 inconspicuous ; flagellum rather longer than the peduncle, of 

 fourteen articuli. Inferior antennae rather longer than the 

 superior ; first joint of the peduncle short and stout ; second and 

 third longer, slender, subequal ; flagellum about equal in length 

 to the peduncle, of seven elongated articuli, each with a circlet of 

 a few delicate hairs. Anterior gnathopoda with the propodos 



