Andbrton. — Observations on New Zealand Fishes. 485 



are slightly longer than the first pair and are 2-branched ; each 

 branch ends in 3 spinose setae, of which the middle one is the 

 longest. The only mouth organs detected were a pair of man- 

 dibles, working between the rounded upper and lower lips. 

 The divisions of the pereion were not clearly made out behind 

 the broad base of the carapace, but it bears five pairs of pereio- 

 poda. each of them 6- (? 7-) jointed. The first pair are very short 

 — little more than one-third as long as the carapace ; and at the 

 base of each, and in front of it, is a small rudimentary 2-jointed 

 appendage (? branchia). The second pair are 1-branched and 

 slender, and reach considerably beyond the front of the carapace. 

 The third and fourth pairs are longer and stouter, and are 

 2-branched. The second branch springs from the end of the 

 third joint, and is multi articulate, bearing long phimose setse 

 towards its extremity. It is by the vigorous lashing of this 

 plumose appendage of the third and fourth pereiopoda that 

 the animal now swims. The fifth pair are long, slender, and 

 1-branched. In all the pereiopoda there is a tendency to red 

 coloration towards the extremity of the joints, especially of 

 the propodos. The pleon is short, tapering, and ends in a 

 bifurcate apex. 



Among the larvae of a few days old there appears to be a 

 third stage in which the carapace is broadly pear-shaped and 

 the eye-stalks are longer and more slender. In this form the 

 lobes of the liver were very clearly made out, and the move- 

 ments of the simple heart were very easily seen. The colourless 

 blood, marked by its corpuscular jjarticles, is seen to pass into 

 a wide open sinus at the posterior extremity of the vessel, and 

 to be driven forward by the pulsation, to escape again at two 

 apertures close to the anterior end of the tube, near the front 

 of the carapace. 



MUNIDA SUB-RUGOSA. 



We are not yet able to establish the identity of this species 

 with the free-swimming form known as "whale-feed" {Grimothea 

 gregaria). The first Grimothea were noticed in the harbour early 

 in November, but on the 8th and 14th I received a number of 

 specimens of Munida sub-rugosa from Mr. S. Bradley, which had 

 been picked up by his seine net. Two of these were females 

 wdth the eggs attached to the swimmerets, but unfortunately 

 both specimens were dead. The eggs (unmeasured) are very 

 minute and of a greenish hue, and it is difficult to conceive that 

 the large form at present so abundant in the bay is the product 

 of this season's spawning. Several of the fishermen are at 

 present on the look-out for the berried adults, and it may be 

 possible this season yet to hatch out these eggs and to finally 



