CA\An[A\ FISiHERIK^ EXPEDITIOX , 101 ',-15 



'55 



Eh^t 



Ctenolabrus 



I # 1 - loo pr Station all hauls 

 l^fcmore than loo 



Fig. 4. 



The young stages of this s])ecies have been shown by Agassiz (On the Young 

 Stages of some Osseous Fishes, Part III, Ctenolahrus coeruleus DeKay. pi. XIII, and 

 XIV). I have not, however, been able to identify the species with certainty from these 

 drawings, buti as the larvae agree very well with the young stages of the related 

 European form Lahrus rupestris, I have had no hesitation in ascribing the Canadian 

 material to Ctenolahrus adspersus* According to Professor Ehrenbaum's '' Nordisches 

 Plankton," the larvae of Tautofja onitis are very similar to those of this species, but 

 as Tautoga is a southern form, there can hardly be any question of confusion with the 

 present species. 



As will be seen from the illustrations, the Canadian form differs from the European 

 in having a very distinct massing of pigment at the posterior basis of the dorsal fin. 



The diameter of the ova is the same in both species, viz., 0-8 — 0-9 mm. 



The distribution of Ctenolahrus adspersus ranges from Labrador to Sandy Hook 

 (Jordan and Evermann) ; it is a distinctly coastal form, especially affecting rocky 

 bottom. Ctenolahrus adspersus is summer-spawning; on the first cruise of the Princess 

 (June I) to June 1.5) but not more than twenty-one eggs of this species were taken. 

 On the second cruise (August 3 to August 12), on the other hand, numerous larvae 

 were found, and only very few eggs, most of those found being in a very advanced 

 stage of development. 



♦ Tmitogolabni.y ndsperus Walbaum. 



