— 170 — 



(y) Greater part of the sides unpigmented, the postanal pigment being 

 almost exclusively restricted to the ventral and dorsal rows, which 

 consist of large, stellate chromatophores. A ^ but slightly longer 

 than A^. 



Number of vertebrae : 48 — 51 (No. of abdominal vertebrae gene- 

 rally: 14 — 16); the body is much thicker in front than behind the 

 anus. Eyes very large. Development of fins rapid Gadus minutus 



Number of vertebrae: 52 — 55 (No. of abdominal vertebrae gene- 

 rally: 17 — 19); the body is not much thicker in front than behind 

 the anus. Eyes not unusually large. Development of fins not very 

 rapid Gadus Esmarhi 



III. Main group. Mediolateral streak wanting. One distinct post- 

 erolateral transverse bar present Gadiculus argenteus 



C. Stages from about 15 —20 mm. up to ca. 30 mm. 



I. Main group. Mediolateral streak present. 



(a) Anus under D^. 



The body unusually elongated. A^ reaches further back than D^. Caudal 

 fin forked. Development of the rays very slow. Eyes very large Gadus saïda 



The body not unusually elongated. A^ does not reach further back 

 than D^. Caudal fin square posteriorly. Abdominal vertebrae 18—19. Gadus callarias 



(b) Anus under D^ 



The anus under the anterior Vsrd of D^. Caudal fin very broad posteri- 

 orly and square. Deep-black pigment spots fill up a great part of the 

 unpaired fins. Abdominal vertebrae 20 — 22 Gadus poUachius 



The anus under the posterior Vsrd of D^. Caudal fin concave posteriorly. 

 The fins, especially the caudal, somewhat less pigmented than in G. poUa- 

 chius. Abdominal vertebrae 23 — 25 Gadus virens 



II. Main group. Mediolateral streak wanting. A posterolateral transverse 

 bar not present. 



(a) A n u s under D^ Gadus œglefinus 



(b) Anus under D' 



(a) Greater part of the sides densely pigmented. Anus under the first 

 i/srd of D2. 



(x) A^ and A^ connected. Body unusually high , Gadus luscus 



(y) A' and A^ separated. Body not unusually high. 



D^ unusually short and separated from D^ by a large interspace. 



Anteroventral pigment absent Gadus Poutassou 



D^ not unusually short nor separated from D^ by a large inter- 

 space. Anteroventral pigment present Gadus meiiangm 



(/?) Greater part of the sides unpigmented. Anus under the posterior Vsrd 

 of Di. 



Number of vertebrae: 48—51 (No. of abdominal vertebra; generally: 

 14—16). Snout rounded; lower jaw does not extend much further 



