59 



Apart from these catches we have not fouiid the bottom-stages of tlie 

 common Cottus iu the Danish waters duriiig recent years. 



The hottom-stages of the long-spined Cottus have also rarely been met with. 

 In the western Baltic one specimen was taken in January 1903: 



D. 6 — 1—03. S. h'om Lyø, 2'/, — 4 Fucus vescictdosus and serrattis. Toothed Dredge: 

 1 long-spined Cottus, scarcely 2 indies (ca 5 cm.). 



Tab J. Long-spined Cottus, Cottus bubalis. 



At Fænø in the I)eginning' of May 1902. 



c. 23.. 



c. 21 



c. 18 



c. 15., 



c. 13 



c. 10.. 



u. 8 



c. 5 



c. 2., 



females. 



00 







oooooooooooo 

 ooooooooooooooo 



o OOOOOO 0000000 ooo 



o oooo 



ooooooooo 



ooooooooooooooo 



o o ooooooooooooooo 



ooooooooo 



II Gr. 



I Gr. 



oo 



oooooooooo 



ooooooooooooooo 



ooooooooooooooo OOOOOO 



ooooooooooooooo 

 ooooooooooooooooooo 

 ooooooooooooooo 

 ooo 



o Gr. 



males. 



ooo 00 



oooooooooo 



oooooooooo 



OOOOOO 



ooooooooo 



000 



oooo 0000 

 00 



I + II Gr. 



(The females and males of 

 this group were nol dist- 

 inguished.) 



In the collections is a specimen of the long-spined Cottm of 4 cm. labelled 

 Flækøjet, 1 — 9—91 (Flækøjet is a ground io the Little Belt near Fænø). 



In May 1902 we found a number of the bottom-stages of the long-spined 

 Cottus at Fænø, but by this time they were about a year old. 



All the pelagic young of the long-spined Cottus we have found had a 

 length of ca. 6 — 9 mm. 



A good picture of the groiotk of the two species of Cottus will be obtained 

 from the lists of measurements of the Cottids at Fænø in May 1902. A O group 



