'3 



last joint of the fifth pair of feet broadly oval, rounded at the 

 exi-remity, instead of lanceolate and acute ; the basal joint of the 

 antennulse advanced and visible in a dorsal view between the 

 frontal teeth; the chclipeds elongate; the abdoniui of the male 

 oblong instead of narrow trianj;ular. 



OVAI.IPES TRIMACULATLS (dc Haau). 



1833. Aiiisopiis triiiiaciilaia, de Haan, Crust- Japonica, decas i,. 



P- 13 



1834. Platyoiiicliiis bipiistiilafiis. ]\Iilne-Edwards, Hist. Xat, 



Crust., vol. I, p. 437, pi- 17, tig. 7-10. 

 1838. Anisopus irhnacukiius, M'Leay, Illustrations Zool. South 



Africa, p. 62. 

 1843. Anisopus trunaculatus, Krauss, die siidafrik. Crustaceen, 



p. 27. 

 The Anisopus of de Haan was instituted as a subgenus of 

 Corystes, and to it he assigned in 1833 his own species punctata 

 and trimaculata, with the addition of occllaia, Herbst, doubtfully. 

 To the name friviaciilatan sp. he subjoined "(Seba f. xviii,fig. 

 9), Dr. Horstoka littore Promontorii Bonae Spei." That the 

 specimen forwarded to me from the Cape belongs to de Haan's 

 species trimaculata is beyond question, but the proper name for it 

 may be debated. In 1834 Milne-Edwards described his Platyoni- 

 chns bipusfulatus. from the Indian Ocean, and the fie-ure of this in 

 hi'- (undated) At'as shows it to be identical with de Haan's tri- 

 maculafa. In iS35deHaan,decas 2,p 44fpl.2,tig. i,t describes 

 Corystes (Anisopus) punctata, n. sp-, and adds a note that Platyoni- 

 chus bipustulatus, Milne-Edwards, appears to agree with the other 

 species of this subgenus, which Horstok had procured at the Cape, 

 and which was distinguished from C. punctata by shorter frontal 

 and blunter lateral teeth, by having the thorax marked behind 

 with two blood-red spots, the hands reddening on the inner side^ 

 the thorax and chelae yellow scarcely rubro-punctate or granu- 

 late. That he speaks of only two spots on the carapace of his 

 trimaculate species is due to the fact that the arcuate middle spot 

 is common both to this and punctata. In his index, ;p. 233, he 

 mentions//^;/^i;'rt/rt;alone, not naming- either trimaculata or bipus- 

 tulatus. Miersin i876and i886gives as synonyms of P. byptistu- 

 laius, Anisopus puncfatus, de Haan, Platyonychus purpureus, Dana, 

 and Portunus cafharus. White. Haswell, in his Catalogu'e of 

 Australian Malacostraca, 1882, does the same, except that he 

 does not give the reference to \\ hite- It may be questioned 

 whether the distinctions drawn by de Haan. depending chiefly on 

 colour markings, are of specific value. It may also be questioned 

 whether the character implied in the specific name, apart from 



