62 



Fish-eggs ; The Cod Family. 



species viz , Miiller's topknot (Z. punctatus") brought to us 

 as a remarkable kind of brill and the One-spotted topknot 

 (Z. unimaculatus) we have found in the Thames Estuary. ' They 

 are very rare, but here further comment is unnecessary, other 

 than that Webb says (Z.c.) they " frequent our rockpools " at 

 Dover. 



Previously we have referred to the translucent buoyant eggs 

 of some fishes, but as these may neither be familiar to many 

 fishermen, nor to all Members of our Committee, we venture 

 to insert illustration of three different stages of development. 



FIG. 9. A. Egg of Whiting, shewing the commencing aggregation of 

 the germinal substance at its lower part. B. Egg of Flounder, containing 

 the early long-shaped embryo ; colour points are already developed, 

 c. Egg of Cod, with embryo at sixth day of hatching. The natural sizes 

 of these eggs are about that of a pin's head, and here, of course, are greatly 

 magnified (after Prince and Mclntosh). 



The Cod Family (Gadidce). Compared with some places, 

 our district's commercial returns in the cod family presents but a 

 moderate show, yet at certain seasons a quantity gets landed at 

 Harwich, Ramsgate and Folkestone. Within our area migration 



