AM PHI POD A — STEBBING, 617 



CyrtophiuM calamioola, Giles, Journ. Asiat. 8oc. Ben<?al, liv, 

 1885, pt. 2, p. 54, pi. i. $. 



Cerapus calamicola, Stebbing, Chall. Rep., Zoo)., xxix., 1888. p. 

 563 $. 



€erapus flindersi, Stebbing, Chall. Rep., Zool., xxix., 1888, p. 

 1163, pi. cxxv. Q. 



Cerapus /lindersi, Chilton, Rec, Austr. Mus., ii., 1892, p. 1, pi. i. 

 (J and J. 



Cerapus calamicola, A. O. Walker, in Herdman, Rep. Ceylon 



Pearl Oyster Fish., ii., 1904, p. 293. 

 Cerapus calamicola, Stebbing, Das Tierreiclt, xxi., 1906, p. 740, 



When the figures of the second gnathopod in the male, as 

 given by Templeton, are compared with those drawn by Chilton 

 from specimens collected at Port Jackson, and these again with 

 Dr. Giles' drawing from an Indian specimen, and the illustration 

 here oflfered from a Botany Bay example, the conclusion will seem 

 justified that, unless there are other characters of distinction, all 

 these variations belong to a single species. Mr. A. 0. Walker is 

 so convinced of the identity of C. calamicola and CjUndetsi that 

 he unites them without discussion. Yet in the former a deep 

 rounded cavity is represented between the two distal teeth of the 

 fifth joint, which does not appear in any of the other figures. 

 This, however, is less strange than the two equal parallel-sided 

 processes which Dr. Chilton found in one of his male specimens 

 in place of the usual dentiform prolongations. In the specimen 

 here figured the fifth joint agrees with the abnormal form just 

 mentioned in having the fifth joint much elongated, and the 

 sixth much curved, but it approaches C. calamicola in having the 

 outer process greatly larger than the innei", which is here quite 

 minute, opposable to a little process on the inner margin of the 

 sixth joint near the base, a peculiarity not noticed elsewhere. 



The first antennae have the first joint much deeper than the 

 others, the basal half forming a little sharp projection distally ; 

 the second joint is longer than the first and about three- 

 fourths as long as the third ; the eight-jointed flagellum is longer 

 than the last joint of the peduncle, and fringed with numerous 

 sensory filaments. The second antenuc^ are rather longer tlian 

 the first and reach very nearly as far ; the last joint of the 

 peduncle is nearly as long as the six- or seven-jointed flagellum, 

 of which the first joint is nearly as long as the next five, each of 

 the latter having a small apical spine. 



The male specimen, taken from a tube 13 mm. long, measured 

 from front of head to fold of pleon 5 mm., the antenna? pro- 

 jecting about another 6 mm. 



