370 THE ZOOLOGIST. 



scarcely probable that our old friend the so-called "Cape Salmon," Oto- 

 lithic cequidens, could be the fish referred to. I therefore sought, and not 

 in vain, the opinion of Mr. G. A. Boulenger, of the British Museum, on the 

 subject, who has informed me that the fish was probably a Herring, Chanos 

 sahnoneus. Dr. Giinther describes this species as " extremely common ; it 

 enters fresh waters, and exceeds a length of four feet ; its flesh is highly 

 esteemed." 



INSECTA. 



The Common Cockroach. — A few days ago my daughter brought me a 

 full-grown Cockroach, Periplaneta orientalis, of a pure white colour, excepting 

 the eyes ; it was even whiter than the white satin moth, but before I had 

 time to kill it the colour had changed to a light brown. It was found among 

 some papers in a closet. — James Sutton (33, Western Hill, Durham). 



[Immediately after the moulting of the Cockroach its colour is of a 

 creamy white; but after a few hours, and the influence of air and light, it 

 acquires the depth of coloration characteristic of its age. Before reachiug 

 the adult form it changes the skin an uncertain number of times — not less 

 than five, probably as many as seven. A good account of the Common 

 Cockroach may be found in E. A. Butler's ' Our Household Insects.' — Ed.] 



