General Catalogue of South African Crustacea. 431 



Gen. CYCLOIDURA, Stebbing. 



1874. Cyclura (preocc), Stebbing, J. Linn. Soc, vol. xii., p. 146. 

 1878. Gycloidura, Stebbing, Ann. Nat. Hist., Ser. 5, vol. i., 



p. 36. 

 1905. Zuzara, Hansen, Q. J. Microsc. Sci., vol. xlix., pt. 1, p. lOl. 



Gycloidura (?) perforata (Milne-Eclvvards). 



1849. Spharoma perforata, Milne-Edwards, Hist. Nat. Grust., vol. iii., 

 p. 211. 

 Specimen found at St. Paul by Quoy and Gaimard, length 

 3 lines. 



1843. S. p., Krauss, Siidafrik. Crust., p. 65. 



" In the Algae of Natal Bay. Length 5'2 lines." 



1905. Dynamenella (?) p., Hansen, Q. J. Microsc. Sci., vol. xlix., pt. 1, 

 pp. 117, 126. 

 Hansen assigns this species to Dynamenella with hesitation. 

 He does not notice the fact that Milne-Edwards describes the 

 seventh thoracic segment as armed with a long and strong 

 median tooth projecting over the abdomen. This would seem 

 to exclude the species from Dynamenella, defined as having 

 " both sexes rather similar in aspect, without real processes," 

 while this process, and the " very large, oval, round-ended 

 rami '' of the uropods indicate at least a near approach to the 

 genus Gycloidura. According to Hansen this is a synonym of 

 Zuzara, instituted by Leach in 1818. But Zuzara is far from 

 clearly established. Leach, in the Diet. Sci. Nat., vol. xii., 

 p. 341, couples it with SpJicsrovia as having the body capable 

 of globation and the last segment of the abdomen entire, and 

 separates it from Sphoiroma as having the outer ramus of the 

 uropod larger than the inner. On p. 344, however, he states 

 that Zuzara has the last segment of the abdomen emarginate 

 at its extremity, with a slight projection from the bottom of 

 the emargination. He describes two species, both with the 

 seventh thoracic segment produced backwards, and the first, 

 Z. semipunctata, as having the outer ramus of the uropod 

 ending abruptly in a point. But Milne-Edwards avers, from 

 personal inspection of the original specimen, that it is not the 

 seventh but the sixth thoracic segment which is produced 

 backward. He describes the outer ramus of the uropod as 

 curved somewhat outward at the end. 



