30 Annals of the South African Museum. 



a synonym. But Ortmann who, in 1891, considered the differences 

 between S. sieboldi and its contemporary species S. haanii as "quite 

 small and scarcely visible," in 1897 reinstates S. haanii as an 

 independent species. There are indeed in de Haan's figure of 

 S. haanii, von Siebold, several points which separate it from its 

 companion species. Instead of the antero-lateral angles of the 

 carapace being square as in S. aequinoctialis or obtuse as in S. 

 sieboldi, they are acutely advanced, and the constriction at the 

 cervical groove is more pronounced than in the other species. On 

 each branchial region there is a curved line of upraised tubercles at 

 some distance from the lateral margin, and the lateral lobes of 

 the second pleon segment have their margins cut into eight 

 upward, outward, and downward pointing teeth not found elsewhere. 

 The nearest ally of this species appears to be S. scutytus, Latreille, 

 figured in the " Encyclopedic M6thodique," pi. 320, fig. 2, 1818, and 

 mentioned without special description in vol. x., p. 416, 1825. In 

 1837 it was described for the first time by H. Milne-Edwards, Hist. 

 Nat. Crust., vol. ii., p. 283. On the presumption that the specimens 

 which I have received from South Africa belong to the species which 

 Ortmann has very briefly described under the name S. elisabethce, 

 from the Cape and Port Elizabeth, I propose to compare that 

 species with S. sculptus as re-figured and re-described by Whitelegge. 



SCYLLABIDES ELISABETHS (Ortmann). 



Plate XXX. 

 18S7. Scyllarus clisabcthce, Ortmann, Zool. Jahrb., vol. x., p. 270. 



The characters given by Ortmann are : carpus (fifth joint) of the 

 first and second peraeopods above without keels, at most with blunt 

 longitudinal rolls, as distinguished from the two sharp longitudinal 

 keels in S. squammosus ; keels of the fourth joint with no marked 

 wing-like elevation ; sixth joint of the second perasopod above com- 

 pletely rounded, without edge (features attributed in common to S. 

 (equinoctialis and S. elisabetha as distinguished from S. latus and S. 

 haanii) ; ante-penultimate joint of the second antennae having at its 

 front outer corner a straight tooth (a feature distinguishing three of 

 the species just mentioned from S. latus, in which the tooth in 

 question is hook-shaped upward curved) ; pleon humped, especially 

 on the third and fourth segments ; cephalothorax with a distinct 

 lateral notch behind the eyes (as opposed to S. cequinoctialis, in 

 which the pleon is scarcely humped, and the lateral notch of the 

 carapace evanescent). 



