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The definition of this group given by Miers was scarcely 
satisfactory, since, in limiting it to species with the carapace 
triangular or elliptical, it might be thought to exclude the 
titular genus Parthenope. Alcock avoids this by defining the 
group as one “in which the carapace is sometimes sub-pen- 
tagonal or ovate-pentagonal, more commonly equilaterally 
triangular, and sometimes almost semi-circular or semi-elliptical 
in outline ; in which the cardiac and gastric regions are usually 
so deeply marked off from the branchial regions on either side 
as to make the dorsal. surface of the carapace trilobed; in 
which the chelipeds are vastly longer and more massive than 
the ambulatory legs ; and in which the rostrum is either simple 
or obscurely trilobed.”’ 
Gen. Parthenope, Fabricius. 
1798. Parthenope (part), Fabricius, Suppl. Ent. Syst., p. 352. 
1801. Maja (part), Lamarck, Syst. Anim. sans vertébres, p. 154. 
1834. Parthenope, Milne-Edwards, Hist. Nat. Crust., Vol. I., 
P- 359- 
1895. Parthenope, Alcock, Journ. Asiat. Soc. Bengal, Vol. LXIV. 
Pty 2, pp: 256,270: 
This genus to which Fabricius attributed eight species, 
had been restricted, when Milne-Edwards published the first 
volume of his history of Crustacea, to the single Cancer horridus 
of Linnaeus. One or two Indian species have since been added 
to its still scanty register. It is “‘distinguished from Lambrus 
by the nature of the so-called basal antennal joint, which is 
relatively long, and nearly reaches to the level of the inferior 
orbital hiatus ; the fingers also are much less turned inwards.”’ 
(Alcock). 
Parthenope horrida (Linn.) 
1758. Cancer horridus, Linn., Systema Naturae, Ed. X., p. 629. 
1788. Cancer horridus, Herbst, Krabben und Krebse, Pt. 7 
Py 1222, Pl. a4, igs oo. 
1798. Parthenope horrida, Fabricius, Suppl. Ent. Syst., p. 353. 
1834. Parthenope horrida, Milne-Edwards, Hist. Nat. Crust., 
Vol. 1.,. p:. 360: 
1895. Parthenope horrida, Alcock, Journ. Asiat. Soc. Bengal, 
Mol. LXIV.; Pti2) p2276: 
Alcock supplies numerous other references for this queer- 
looking, often-figured species. He cites Herbst with a mark 
