222 



SEXUAL DIMORPHISM 



pectoral fin, and another behind the opercle, as in the 

 male. 



Steindachner (Ich. Span. u. Port, 1868, p. 35) seems to have 

 been the first to assert that the Julis mediterranea, and J. 

 giofredi of Risso, described by Dr. Giinther (Cat. Brit. Mus) 

 under the names Coris julis and Coris giofredi, were the two 



-Coris julis, a Mediterranean fish. A, immature ; B, mature male ; C, mature 

 female. 



sexes of one species. M. P. Gourret has recently, in the Ann. 

 du Muse'e de Marseille, very explicitly opposed Steindachner's 

 conclusion. My friend Mr. E. W. L. Holt, during a stay at 

 Marseilles, had opportunities of studying the fish, and has 

 very kindly supplied me with the results of his observations. 

 The figures of the two mature forms and the young male 

 (Fig. 21, A, B, C) have been delineated from specimens of his 

 under his supervision. 



