A REVISION OF THE COTTOID FISHES OF THE GENUS 



ARTEDIELLUS 



By Peter Schmidt 

 Of the Zoological Museum, Academy of Sciences, Leningrad, V, 8. S. R. 



During the last 20 years there were described by different authors, 

 American and Russian, many Pacific species of the genus Artediel- 

 lus Jordan, a group in which species are very difficult to distinguish. 

 It would perhaps not be superfluous to give a revision of this genus 

 from the large collection of the zoological museum of the Russian 

 Academy of Sciences in Leningrad, where all known species of this 

 genus, Pacific and Atlantic, are now represented by many specimens 

 and from different localities. Especially valuable is the collection 

 of the Hydrographical Expedition of the Pacific Ocean made during 

 the years 1908-1920 by many cruises of the steamship Okhotsk and 

 other vessels of the Russian Navy, working on the survey of the 

 coasts along Bering, Okhotsk, and the North Japanese Seas. From 

 a study of the Cottidae of this collection and comparing these speci- 

 mens with those of other ooilections of the museum, I am able to 

 present the following short revision of the genus ArtedieUus Jordan. 

 A more detailed study will be published later in the Russian 

 language. 



Family COTTIDAE 



Genus ARTEDIELLUS Jordan 



Teeth on vomer and palatines. Upper praeopercular spine strongly 

 curved and hooked upward, sometimes with a small denticle. No 

 slit behind last gill. Gill membranes forming a broad fold across 

 the isthmus. Skin naked and smooth or partly covered by cuta- 

 neous prickles. No developed anal papilla. 



ANALYSIS OF SPECIES OF ARTEDIELLUS 



c\ Skin completely naked and smooth. 



b\ Nasal spines obsolete ; skin soft and smooth, loosely attached to the 

 body ; pores on upper sides of head few and inconspicuous. 



miacanthtis. 



No. 2685.— Proceedings U. S. National Museum, Vol. 71, Art. 13 



48224—27—1 1 



