278 A MONOGKAnr of the ArSTRALIAN APnnODITEA, 



length as the palpi, and, like the antennro and tentacle, incrassated 

 below the apex, and terminating suddenl}' in a sharp slender 

 point. Elytra 12 pairs, but apparently small, and leaving the 

 middle of the back and lower portion of the body uncovered. They 

 are of a rounded form, tuberculated on the surface, and ciliated 

 on the external margin. The feet are stout, biramous. ]3ristles 

 of ventral branch stout, of a yellow colour, somewhat curved 

 near the apex, and a little below the point strongly serrated and 

 striated across. Tlie fascicle of bristles springing from the 

 dorsal branch is composed of two kinds — one numerous, slender 

 when compared with those of ventral branch, straight, acute at 

 the point, and very finely serrated on both sides; the other, 

 slender hairs, longer than the others, very numerous and quite 

 smooth, appearing like a brush of fine hairs intermixed with the 

 bristles. The dorsal cirri are, like the antennae, incrassated 

 below the apex, and ringed with black, and terminating suddenly 

 in a fine slender point. Yentral cirri of feet setaceous, and 

 reaching nearly to the apex of the ventral branch of the foot. 

 Anal cirri stout, and of the same structure as the dorsal. — [^Daird.'] 



The locality of this species was uncertain but it was supposed 

 probably to have been obtained in New Zealand or Australia. 



Thormora argus. (PI. YIII., figs. 5 — 12.) 



Pohjnoe- ar(jus, Valenciennes; Quatrefages, 1. c, p. 247. 



Head small, subquadrate, covered. Middle antennoo long, 

 nearly twice the length of the lateral ones. Tentacles very thick, 

 conical, longer than the antennce. Body con^osed of 26 thick, 

 broad segments. Elytra (12 pairs) of moderate size, the anterior 

 decussate and imbricate ; median and posterior (?) scarcely 

 imbricate, not decussate, rounded, very slightly tuberculated, not 

 fimbriated. Cirri rather long. Appendages, with the exception 

 of the tentacles and inferior cirri, tumid near the acute apex. 

 [^Qiwiref(iges.~] 



Port Western. 



