ÖFVBRSIGT AF K. VETENSK.-AKAD. FÖRHANDLINGAR 1899, NiO 6. 545 



a: Fore part of the body witli the head com- 

 pressed (breadth of the head less than 80 % 

 of the greatest height of the body); body 

 coloured with coraplete transverse bands; 

 number of spines in the first dorsal 6 — 8: 

 — Amhlygohius, Blkr. 

 ß: Fore part of the body with the head terete 

 (breadth of the head in adults more than 

 80 fo of the greatest height of the body); 

 body coloured with irregulär spöts or bands, 

 broken in the middle line of the sides, 

 aa: Number of spines in the first dorsal fin 

 more than 7 : — Acantliogohius, GiLL. 

 {^AmMycliceturichthys, Blkr.). 

 hh: Number of spines in the first dorsal fin 

 at most 7 (5—7). 



aa: Fore clavicular margin (in the bran- 

 chial cavity) provided with a soft rim 

 or some dermal flaps or tubercles, 

 aaa:Distance between the eye and 

 the hind margin of the pre- 

 opercle about half the post- 

 orbital length of the head — 



— llypnus, Jord., Everm. 

 (Sßß: Distance between the eye and 



the hind margin of the preoper- 

 cle less than 2/. (<37 %) of the 

 postorbital length of the head 



— Eichwaldia, nov. subg. — 

 Gohius caspius, EiCHW. 



ßß: Fore clavicular margin without 

 protuberances; distance between 

 the eye and the hind preopercular 

 margin more than 2, . (;> 45 »^) of 

 the postorbital length of the head. 



