70 



MONOGRAPH OF THE FEESH WATER 



III. 



yond the anterior margin of the anal. Insertion of 

 ventrals under the anterior margin of first dorsal, and 

 behind the pectorals. 



Cottns Alvordii, Grd. — Body stout and 

 short, tapering rapidly away. A second preopercular 

 spine, very minute. Origin of anal fin opposite the 

 third ray of second dorsal. Tip of pectorals extend- 

 ing beyond the anterior margin of the second dorsal 

 and anal fins. Insertion of ventrals near the lower 

 edge of pectorals, in advance of the anterior dorsal. 



Cottns meridionaliSj Grd. — Body stout 



and short. A second and third, very minute 

 spines on the preopercular. Origin of anal fin op- 

 posite to fourth ray of second dorsal. Tip of pecto- 

 rals not reaching the anal. Insertion of ventrals 

 even with the lower edge of the pectorals, in advance 

 of the anterior dorsal. 



II. Kays of ventral fins, four in number. 



Cottus gracilis, Heck. — Body fusiform. 

 Tip of pectoral fins extending beyond the fourth 

 ray of second dorsal, and first of anal fin. Occa- 

 sional palatine teeth. Insertion of ventrals under 

 the pectorals, and in advance of anterior dorsal. 



CottllS visCOSUS, Hald. — Body subcylindri- 

 cal, stout. Tip of pectorals not reaching the anterior 

 margin of the anal. Insertion of ventrals behind 

 the pectorals, and in advance of the anterior dorsal. 



Cottus Frankliniij Agass. — Body nearly 

 cylindrical. Tip of pectoral fins not reaching the 

 anterior margin of second dorsal. Insertion of ven- 

 trals in advance of the anterior dorsal, and under 

 the middle of pectorals. 



CottUS g^oMoideS, Grd. — Body subcylin- 

 drical. Tip of pectoral fins not reaching the anal. 

 Insertion of ventrals under the upper edge of the 

 pectorals. 



CottUS boleoides, Grd. — Body fusiform, 

 slender. Tip of pectoral fins extending beyond the 

 fifth ray of second dorsal, and third of anal, fins. 



bus pinnarum pectoralium ultra anteriorem pinnae 

 analis marginem prolatis. Pinnis ventralibus sub 

 anteriorem marginem pinnae dorsalis primee et post 

 pectorales, insertis. 



CottuS Alrordii, Grd. — Corpore crasso 

 brevique cito deerescente. Altera spina prseopercu- 

 lari, admodum parva. Origine pinnte analis posita 

 ex adverse tertio pinnae dorsalis secundse radio. 

 Extremitatibus pinnarum pectoralium ultra anterio- 

 rem pinnarum dorsalis secundse et analis marginem 

 porreotis. Pinnis ventralibus prope inferiorem pec- 

 toralium marginem et ante dorsalem anteriorem, in- 

 sertis. 



Cottus meridionalis, Grd. — Corpora 



crasso brevique. Spina minima secunda atque ter- 

 tia supra prseopercularem. Origine pinnae analis 

 ex adverso quarto dorsalis secundse radio. Extremi- 

 tatibus pinnarum pectoralium non porreotis ad pin- 

 nam analem. Pinnis ventralibus in eadem lineS. 

 qua pectorales, et ante dorsalem anteriorem, insertis. 



II. Pinnarum pectoralium radiis, quatuor. 



Cottus ^aciliSj Heck. — Corpore fusiforme. 

 Extremitatibus pinnarum pectoralium ultra quartum 

 pinnae dorsalis secundas et primum analis radium 

 porreotis. Dentibus palatinis aliquando occurentibus. 

 Pinnis ventralibus sub pectorales et ante dorsalem 

 anteriorem, insertis. 



Cottus visCOSUSj Hald. — Corpore subcylin- 

 drico, crasso. Extremitatibus pinnarum pectoralium 

 non porreotis ad anteriorem pinnae analis marginem. 

 Pinnis ventralibus post pectorales et ante dorsalem 

 anteriorem, insertis. 



Cottus Franklinii, Agass. — Corpore cy- 

 lindrico. Extremitatibus pinnarum pectoralium non 

 productis ad anteriorem pinnae dorsalis secundse mar- 

 ginem. Pinnis ventralibus ante dorsalem anteriorem 

 et sub pectoralium medio, insertis. 



Cottns g^obioides, Grd. — Corpore subcylin- 

 drico. Extremitatibus pinnarum pectoralium non 

 productis ad pinnam analem. Pinnis ventralibus 

 sub superiorem pectoralium marginem, insertis. 



Cottus boleoides, Grd. — Corpore fusiforme, 

 gracile. Extremitatibus pinnarum pectoralium ultra 

 quintum pinnae dorsalis secundse, et tertium analis 



