South African Crustacea. 29 



p. 543, 1882). With the first name it is necessary to deal warily. 

 When Fabricius published it, in 1793, he appointed only two species, 

 the first being Scyllarus arctus, with a long list of earlier references, 

 while the second was a new species confessedly founded on an ill- 

 preserved specimen. In 1893, when dealing with the genus Arctus, 

 Dana, I ventured to remark that " it rather looks as if Dana had 

 stolen the type species of Scyllarus on which to found his new 

 genus." With greater boldness his own countryman, Gill, in 1898, 

 took the step of cancelling Dana's Arctus as a synonym of Scyllarus, 

 and of instituting the newly named genus Scyllarides for those 

 species which Dana had separated from Arctus under the wrongful 

 name of Scyllarus. The true and re-established Scyllarus has the 

 rostrum very short and truncate, the exopod of the third maxillipeds 

 without a flagellum, and the pairs of branchiae nineteen in number. 



GEN. SCYLLAEIDES, Gill. 



1898. Scyllarides, Gill, Science, n.s., vol. vii., p. 98. 

 1901. Scyllarides, M. J. Eathbun, U.S. Fish. Comm. for 1900, 

 vol. ii., p. 97. 



Here the rostrum is very salient, the exopod of the third 

 maxillipeds has a flagellum, and the pairs of branchias are twenty-one 

 in number. 



The species allotted to the genus by Dana were " Sc. sculptus, 

 latus, squamosus, equinoxialis, Haanii, Sieboldi." Ortmann, in 1897 

 (Zool. Jahrb., vol. x., pp. 268-270), makes S. sieboldi, de Haan, a 

 synonym of S. squamosus, and institutes a new species, S.elisabeth(Z. 

 In 1899 Whitelegge (Records of Australian Museum, vol. Hi., pt. 6. 

 p. 155, pi. 29) gave a new description and figure of S. sculptus, 

 Latreille. In 1906 Miss Eathbun, discussing the Brachyura and 

 Macrura of the Hawaiian Islands, makes S. sieboldi, de Haan, and 

 S. haanii, de Siebold, MS., de Haan, both synonyms of Scyllarides 

 squammosus (Milne-Edwards). 



Of these species the first in the field is S. cequinoctialis, Lund, 

 1793, followed by S. latus, Latreille, 1803. For the differences 

 between them Ortmann (loc. cit.) and Milne-Edwards (Hist. Nat. 

 Crust., vol. ii., pp. 284, 285) should be consulted. That a good series 

 of specimens would unite them is not impossible. As synonyms of 

 Scyllarides latus, Miss Eathbun, in 1900, gives Scyllarus herklotsii, 

 Pel, in Herklots, and Scyllarus dehaani, Herklots, 1851. To 

 S. squammosus, Milne-Edwards, 1837, we have seen that Miss 

 Eathbun and Ortmann agree in giving S. sieboldi, de Haan, 1841, as 



