¢ 
OF NEW ZEALAND. 33 
Grapsoidea, Dana, U.S. Explor. Exped. xiii, Crust. part i, p. 67, 
(1852). 
Carapace broad in front, often subquadrate, sometimes subglobose, 
transverse or arcuate anteriorly, never rostrate. Branchie usually 
fewer than nine in number. Epistome very short, often almost linear. 
Efferent channel as in the Oxyrhyncha. Fourth joint of the external 
maxillipeds inserted at the summit, or at the antero-external angle of 
the third joint. Male genital appendages either inserted in the sternum 
itself, or in the basal joints of the last pair of tegs, thence passing 
through a channel in the sternum beneath the abdomen. 
Family I. MACROPTHALMID 2. 
Macropthalmide, Dana, U.S. Explor. Exped. xin, Crust. part i, 
p. 306, (1852). 
Carapace nearly always transverse, broadest in front, with the 
anterior angles acute, the sides not arcuate. Eyes not shorter than 
4 the width of the carapace. Internal antenne transverse, or longi- 
tudinal. Fourth joimt of the external maxillipeds articulated with 
the third at the middle of its front margin, or at its antero-external 
angle. Third jomt never marked with an oblique piliferous crest. 
Second joint of the abdomen in the male narrower than the adjacent 
part of the sternum. 
Sub-Family I. MacroprHaLmMine. 
Gonoplaciens, M. Edw. (part) Hist. Nat. Crust. 1, p. 56, (1837). 
Macropthalmine, Dana, U.S. Explor. Exped. mii, Crust. part i, 
p. 312, (1852). 
Carapace usually depressed. Internal antenne transverse, placed 
beneath the front. External antenne applied to the base of the front. 
HEMIPLAX., 
Hemiplax, Heller, Voy. Novara, Crust. p, 40, (1865). 
Carapace nearly flat, front filling nearly one-third of the breadth of 
the carapace, sides nearly straight, toothed. External maxillipeds 
gaping, third joint shorter than the second, narrowed at the base, with 
the surface obtusely keeled, not bearded. Anterior legs subequal, 
shorter than the following. 
D 
