FROM THE PABOE CHANNEL. 7 



nearly as long as the abdomen. The forehead is somewhat 

 angular and armed with a minute spine. 



The antennules (PI. 3. fig. 5) are moderately long and slender 

 and composed o£ five joints ; the first three joints ai^e short, but 

 the other two are elongated and narrow, and a moderately long 

 sensory filament springs from the end of the penultimate joint ; 

 the formula shows approximately the proportional lengths of the 

 various joints : — 



Number of the joints 12 3 4 5 



Proportional lengths of the joints 5 9 11 20 14 



The antennae, which are slender and of moderate length, are 

 sparingly setiferous ; the secondary branches appear to be 

 entirely obsolete (PI. 3. fig. 6). 



The mandibles (PI. 3. fig. 7) are stout, and have the biting-edge 

 obliquely truncate and armed with several teeth ; the mandible- 

 palp is small, and composed of a single uniarticulate branch. 



The first pair of maxillipeds are each moderately stout and 

 arm.ed with a stout terminal claw, bearing a few small setse, and 

 also with two bisetose marginal papillae (PI. 3. fig. 8). 



The second maxillipeds are also moderately stout, and the 

 terminal claw is curved and somewhat slender and elongated 

 (PL 3. fig. 9). 



The thoracic feet are all moderately slender. In the first four 

 pairs the outer branches are all composed of three and the inner 

 of two joints. The first pair has the inner branches very short, 

 they scarcely reach to the end of the second joint of the outer 

 branches, and their first joint is almost obsolete, the second joint 

 bears two small spinif orm apical setse ; the outer branches are 

 moderately elongate, and armed with long slender marginal and 

 terminal spines, as shown in the drawing (PI. 3. fig. 10). Both 

 branches of the next three pairs are slender, the outer branches 

 being more slender than those of the first pair ; the first joints 

 of the inner branches are very short, but the second is elongate, 

 and the terminal setse of both the inner and outer branches 

 are considerably longer than the branches from which they 

 spring ; figure 11 represents the fourth pair. 



The fifth pair (PI. 3. fig. 12) are small ; the inner portion of 

 the basal joint is produced into a moderately long and narrow 

 appendage, which is furnished with four spiniform setse on the 

 apex and distal part of the inner margin ; the outer portion of 



