■58 ^ WOTES ox TASMANIAN CRUSTACEA, ETC. 



Sub-Fam. Scyphacince. 

 Adoecia, Dana. 

 The generic cliaracter as given by me (in the Trans. N.Z. 

 Inst. Vol. xi., p. 49), and which I adapted from Dana, is 

 some«vhat incorrect. I would alter it as follows : — " External 

 antennae stout, curved, five- jointed, with a three (or, counting 

 the apex, four) jointed flagellum. Maxillipeds having the 

 palp in the form of a slender acutely- pointed plate. Legs of 

 the seventh pair as long as the preceding pairs." 



10. Adoecia euchroa, Dana (PI. II., figs. 1-8). 



I found specimens of this little Tsopod on the sea-beacli 

 between tide-marhs at Eaglehawk Neck. They ran rapidly 

 along the sand, and when pursued rolled themselves into a 

 ball. The species is common on the New Zealand coast. 



The few specimens found by me were very small, being less 

 than ^i\\ of an inch (4 mm.) in length. In colour they were 

 light gray with irregular black markings. Under the micros- 

 cope the integument appears to be minutely scale-like, with 

 a few short scattered spinules, particularly on the margins of 

 the abdominal segments and on the appendages. 



The first antennae (tig. 3) are minute and indistinctly two- 

 jointed ; they are very difficult indeed to distinguish. The 

 second antennae (fig. 4) have a five- jointed base, with a four- 

 jointed flagellum (counting the apical joint) ; all the articula- 

 tions are dotted with numerous short spines. The mandibles 

 (fig. 5) are strong and thick ; at the apex is a stout bifid 

 tooth, inside of this there are two simple teeth and then a 

 strong trifid tooth standing at right angles to the cutting ridge 

 of the limb ; behind these stands a short comb-like process 

 and a brush of fine setae. 



The first maxillae (fig. 6) have the outer plate slender but 

 armed at the extremity with about twelve acute curved 

 spines ; the inner plate ends in a rounded finely setose edge. 

 (The second maxillae were not seen, being lost in the dis- 

 section.) 



The maxillipeds are stated by Dana to be two-jointed in 

 the scyphacinae,*and the second joint to be lamellate; they 

 are so figured for his scyphax ornatus of which he originally 

 took the present species to be the young form In Adoecia, 

 however, they are four-jointed (fig. 7), the basal joint being 

 very short and having the large second joint attached to it 

 obliquely. There is no inner plate attached to the basal joint, 

 but the second joint bears a small oval plate fringed at the 

 extremity. The third joint is short and extremely indistinct, 

 while the fourth is in the form of a flattened, acutely-pointed 

 lamella fringed (not serrately toothed) on its inner edge. 



The abdominal segments (fig. 8) are short, the last being 



