180 



Mr. C. T. Regan on the Osteology and 



small or absent. Praecaudal vertebrse with epipleurals sessile 

 or on short parapophyses ; ribs absent or developed on a 

 few posterior prgecaudals only. Two nostrils on each side. 



Family 1. CottidsB. 



From this large and varied family I remove the Cottun- 

 culidse and Psychrolutidae, but other aberrant types are so 

 closely connected by intermediate forms with the typical 

 Cottids that it seems impossible to split the group further. 

 I cannot recognize even Rhamphocottus as the type of a 

 distinct family ; the example I have examined has 27 vertebrse 



Fiff. 4. 



Pectoral fin skeleton of 1. Iceliis bicornis, 2. Hemitri2Jt€nis americanns, 

 3. Cottiinctdus microjjs, 4. Neo^yhrynichthys latus. The radials are 

 numbered. 



(not 24) , and the whole skeleton is Cottid; there are other 

 members of the family with paired ridges running backward 

 from the orbits and ending in projections borne by the 

 parietal s. 



A good account of the skeleton has been given by Berg; 



