62 



BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Subgenus ACHELOUS de Haan 



Carapace narrow, the antero-lateral 

 margin being the arc of a circle with short 

 radius, whose center is near center of car- 

 diac region. Last spine of antero-lateral 

 margin usually not much if an}'^ larger 

 than the others. 



PORTUNUS (ACHELOUS) SPINIMANUS Latreille 



Plates 26, 27 and 28 



Cancer hastatus J. C. Fabricius, Entomologia 

 Systematica emendata et aucta, vol. 2, 

 1793, p. 448, "in Americae Insulis"; not 

 C. hastatus Linnaeus, 1767. 



Portunus hastatus Fabricius, Supp. Entom. Sys- 

 temat., 1798, p. 367; (a specimen in the 

 Copenhagen Museum labeled "Portunus 

 hastatus" may be a type). 



? Lupa banksii Leach, Trans. Linn. Soc. London, 

 vol. 11, 1815, p. 319, according to White." 



Portunus spinimanus Latreille, Nouv. Diet. 

 Hist. Nat., ed. 2, vol. 28, 1819, p. 47 (type- 

 locality, American waters, common in Bra- 

 zil; type not located) ; Encyc. M6th., Hist. 

 Nat., Entom., vol. 10, 1825, p. 189; Cay- 

 enne, Brazil. 



Lupa spinimana Desmarest, Consid. G4ner. 

 Crust., 1825, p. 98; Brazil. 



Portunus (Achelous) spinimanus de Haan, Fauna 

 Japon., 1833, p. 8. — Rathbun, Bull. Lab. 

 Nat. Hist. State Univ. Iowa, vol. 4, 1898, 

 p. 276. 



Lupea spinimana Milne Edwards, Hist. Nat. 

 Crust., vol. 1, 1834, p. 452. 



Achelous spinimanus White, List Crust. Brit. 

 Mus., 1847, p. 28. — A. Milne Edwards, 

 Arch. Mus. Hist. Nat., vol. 10, 1861, p. 

 341, pi. 32 (the locality "Chile" is incor- 

 rect, but the figures represent the Atlantic 

 species); Crust. Reg. Mex., 1879, p. 230, 

 pi. 39, figs. 2-2a (very young). 



:i Doctor Caiman, who was consulted on the validity of the 

 name "banksii," wrote as follows: "Our evidence on the sub- 

 ject of Lupa banksii Leach i.= a little unsatisfactory. There is 

 only one specimen [in the British Museum] which might be one 

 of his types, but the evidence from our register is not quite con- 

 clusive that it is yo. Leach says that there are 5 branchial spines 

 on the chelipeds, in this specimen there are 5 on one side and 4 

 on the other. The specimen seems to be identical with others 

 which we have identified as Achelous spinimanus, but 1 think it 

 would be a little hazardous to venture on an alteration of names 

 on the unsatisfactory evidence provided by this specimen." 



