THYREOID GLAND OF THE TELEOSTS 



739 



SPECIAL PART 



The species examined were; 



Apodes 

 Isospondyli 



Hemibranchii 



Lophobranchii 



Haplomi 



Acanthopteri 



FAMILY 



Anguillidae 

 Clupeidae 



Salmonidae 



Argentinidae 

 Gasterosteidae 

 Syngnathidae 

 Poecilidae 



Atherindae 



Mugilidae 



Scombridae 



Pomatomidae 



Serranidae 



Sparidae 



Sciaenidae 



Labridae 



Tetraodontidae 



Triglidae 



Batrachoididae 



Blenniidae 



Pleuronectidae 



Anguilla chrysypa. 

 Clupea harengus. 

 Brevoortia tyrannus. 

 Oncorhynchus kisutch. 

 Salmo mykiss. 

 Salmo irideus. 

 Cristivomer namaycush. 

 Salvelinus fontinalis. 

 Osmerus mordax. 

 Apeltes quadracus. 

 Siphostoma fuscum 

 Fundulus heteroclitus. 

 Fundulus majalis. 

 Fundulus diaphanus. 

 Menidia notata. 

 Mugil cephalus. 

 Sarda sarda. 

 Pomatomus saltatrix 

 Morone americana. 

 Stenotomus chrysops. 

 Cynoscion regalis. 

 Micropogon undulatus. 

 Tautogolabrus adspersus. 

 Tautoga onitis. 

 Spheroides maculatus. 

 Prionotus carolinus. 

 Opsanus tau. 

 Muraenoides gunellus. 

 Pseudopleuronectes 

 americanus. 



ANGUILLA CHRYSYPA RAFIN 



The thyreoid gland in young eels, 30 cm. long, has a trans- 

 verse and not a dorso-ventral extension as one might expect in 

 a species with a narrow floor of the pharynx. It begins far for- 

 ward in the arterial bifurcation lying close under the basihyale 

 and extends back to the second gill arteries (plate I, fig. 11.) Close 

 behind the anterior end of the gland the transverse distribution 

 of follicles becomes rather wide, (fig. 1, A), extending over the 



