239 



rays are developed (D.^ 12; D.^ 16; A. 18), in the caudal fin yet 

 only on the under side of the urostyle. Dark pigment is deposited 

 along the upper and lower margin of the caudal peduncle and 

 a good way along the base of the anal fin and the posterior 

 dorsal fin, partly also under the anterior dorsal fin ; moreover 

 part of the dorsal and anal fins is pigmented, and chromato- 

 phores are also found along the middle line of the side, on 

 the base of the pectoral fins, and on front and parietal region. 

 The preopercular spines are visible; on the occiput neither 

 spines nor keels are found (as is well known they are also 

 missing in the adults). 



A young one of Icelus bicornis Reinh. (about 21 mm. long) 

 is represented in fig. 5, plate XI. The species will immediately 

 be recognized by the large head with two large protuberances, 

 a smaller one in front, a larger one behind, in which the 

 occipital crests end. The spines on the preoperculum are distinct; 

 among the snout-spines is seen a blunt protuberance produced 

 by the upper prolongation of the intermaxillaries. Fin rays 

 are developed as follows: D.^ 9; D.^18; A. 14; in front of the 

 caudal fin is still found a remnant of the larval fin. Fine 

 pigment-specks have begun to amass in some places as fore- 

 runners for the marble-banded colour pattern which appears 

 later on. 



Cottus scor plus Linné. 



Tasiusak. 5 — 19 fms. 14. 5. 1899. 1 specim. (Young, 

 37.25 mm.). 



Tasiusak. 6— 10 fms. 27.5.1899. 2 specim. 



Tasiusak. July 1899. 1 specim. 



Tasiusak. In the harbour in quite shallow water. 1901 — 02. 

 5 specim. 



Tasiusak. Shallow water. 22. 8. 1902. 3 specim. 



Tasiusak. 10.3.1901. 1 specim. 



Angmagsalik. 1892. 5 specim. 



XXIX. 16 



