OF NEW ZEALAND. 13 
legs with prominent longitudinal crests. Colour uniformly reddish. 
Length, 1 m.; breadth, 13 in. (M.E. «& L.). 
New Zealand (Coll. Brit. Mus.); Bay of Islands (Dana). 
Sub-Tribe II. CycLomerorpa. 
Cyclometopes, M. Edw. Hist. Nat. Crust. i, p. 264, (1834). 
Cancroidea, Dana, U.S. Explor. Exped. xii, Crust. part 1, p. 67, 
(1852). 
Carapace usually transverse, wide in front, regularly arcuate anteriorly 
(sometimes quadrate or sub-orbicular), never acuminate or rostrate. 
Efferent channel, branchie, male genital appendages and external 
maxillipeds, as in the Oxyrhyncha. Hpistome short, transverse. Internal 
antenne usually transversely plicate. 
Family I. CANCRID. 
Canceride, Dana, U.S. Explor. Exped. xiii, Crust. part i, p. 145, 
(1852). 
Carapace usually transverse, often convex with the antero-lateral 
margins arcuate. The teeth of the margins often obtuse or obscure. 
Margin of the efferent channel to the branchie not defined by a 
longitudinal ridge on each side of the pre-labial plate or palate. Ambu- 
latory legs all gressorial, with styliform tarsi. 
Sub-Family I. Cancrinx. 
Cancrine and Xanthine, Dana, U.S. Explor, Exped. xiii, Crust. 
part i, p. 147, 148, (1852). 
Anterior legs, with the fingers acute, not spoon-excavated at the tips. 
CANCER. 
Cancer, Linn. (part) Syst. Nat. p. 1038, (1766); Leach, Trans. 
Linn. Soc. xi, p. 320, (1815); Dana, U.S. Explor, Exped. xiii, Crust. 
part i, p. 148, (1852); A. M. Edw. Nouv. Archiv. Mus. Hist. Nat. i, 
p. 185, (1865). 
Platycarcinus, M. Edw. Hist. Nat. Crust. i, p. 412, (1834), 
Carapace transverse and usually flattened above; latero-anterior 
margins very long, curving backwards to the latero-posterior crest or 
