VERTEBRATA 



259 



is the little Acantholabrus exoleta, popularly known as the 

 " Rock Cock." It is about seven inches long, and the 

 male is beautifully marked in diamond-shaped spots, 

 green and blue, upon a dark, red-brown ground. 



The " Corkwing " (Crenilabrus melops of the books). 

 Now here is a point upon which I am certain, and which 



Fig. 111. Young of Great Spotted Wrasse. Laltwt* maculatus 

 Natural size of actual specimen, size of adult 



justifies me in questioning much as regards the identifica- 

 tion and nomenclature of our less important fishes. 



The two last-named, it will be observed, are not only 

 given as two species, but as representatives of two genera, 

 and they are but male and female of the same species. 



It struck me, many years ago, that I could never find a 

 male Crenilabrus nor a female Acantholabrus. 



