DEVELOPMENT 



333 



and other fixed objects when at rest, and it has been found that 

 artificially hatched Gar Pikes will adhere by their discs to the 

 sides of a glass jar. 



1 20. — LARVAL FISHES. 



A. Argvropelecus ocuIeatus,X 4. (After Brauer) ; B. Leptocepholus sp.,Xi\. 

 (After Roule) ; c. Stylophthalmus 7nacrenteron,:<2\. (After Regan) ; D. Angler 

 {Lophius piscatorius), X 2|. (After Taning) ; e. Sun-fish {Mola lanceolata), >- 2*. 

 (After Schmidt); F. Truncated Sun-fish (Ranzatiia truncata),xS. (After 



Schmidt.) 



Some pelagic larvae and young fishes also possess curious 

 structures that disappear altogether later, and the larvae may 

 be so different from the adults that they have been described 

 as distinct species or even genera. In the oceanic Sun-fishes 

 (Molidae), for example, the newly hatched larva is quite normal, 



