302 



SCANDINAVIAN FISHES. 



THE BIMACULATED SUCKER. 



LEPADOGASTER BIMACULATUS. 



Fig. 75. 



Dorsal (uid (nial fiits dhtinctlji scpaiatrJ fiom flic caiitJal fin, the ,firsf containing at most 7 rai/s and the anal 

 Jin 6. Breadth of the snout just in front of the eijes greater than its length, n-hieh is about eqwd to the hreadth of 

 the interorhital space, to the length of the base of the dorsal or anal fin {the difference usually being only slight), 

 or to the distance between the dorsal and caudal fins. Two nostrils on each side, within the line from the upper an- 

 terior corner of the ei/e, the posterior with a small muciferoiis pore beside it, the anterior alone iritli a slightly 

 raised, tubular margin, but u-ithout any lobate appendage. Longitudinal diameter of the eye in small specimens 

 {about 30 mm. long) "z., or more of the breadth of the interorbital space, in large specimens {over 50 mm. long) 

 Va o>- less thereof. Longitudinal diameter of the entire adhesive disk about 18 — 21 % of the lengtli of the body: 

 pelvic disk {wit]iin the ventral fins) short and round: postclavicular di.sk trapezoidal, broadest behind. Length of 

 the head from about ^'4 to '//, greatest depth of the body front about ^/\, to V?''? 'f^^'^'^ de2)fh of the tail about 

 V'12', (tnd the length of the caudtd fin from about ^/r, to "/is'') of the length of the body. Length of the pectoral fins 

 about equal to the greatest depth of the body, the lateral flap of the posterior division of the ventral disk ex- 

 tending scarcely half-way up the pectored fins. 





Fig. 75. Lepadojaster biinucuhttus from Norway, M. v. DCden 1845. M;igi). 2 diaiii. 



A', br. C; Z). C; A. 4-^ P. 21 1. 22"; V. — ; 6'. .r + 1. 10 +.r; 



4 



Vert. 29 1. 30. 



.Vyo. Bimacidated sucker, Penn., Drit. ZooL (ed. 177G), torn. Ill, 

 p. 345, tab. XXII, App.; C'yclopteriis bimaculaUis, Donov., 



Brit. Fish., IV, tab. LXXVIII; Flum. (Lcpadogaster), Brit. 

 Anim., p. 190; Yarr., Brit. Fish., ed. 2, vol. II, p. 363: 

 DiJB. et KOREN, Vet.-Akad. Handl., 1844, p. 109, tab. Ill, 

 iig. 7; NiLSS., Skand. Fu., Fisk., p. 241; Gthb, Cat. Brit. 

 Mns., Fish., vol. Ill, p. 514; Coll., Forb. Vid. Selsk. Cbrist., 

 1874, Tilhog«b., p. 90; MoR., Hist. Xat. Foiss. Fr., torn. 



" From 25'6 to 30*3 % of tbe k'tiglb of tbe body, according to Canestrini. In specimens from Norway, of an average lengtb of 

 30'7 mm., tbe length of the head is on an average 29'6 % of that of tbe body. 



'' From 11"6 to 15 % of tlie lengtb of tbe body, according to Canestrini. In the Norwegian specimens just mentioned tbe average 

 is 12'7 "o of the length of tbe body. 



■^ In tbe Norwegian specimens just mentioned tbe average is 8'1 °o of the lengtb of tbe body. 



'' From 20'4 to 15'5 % of tbe length of the body in specimens between 33 and 53 mm. long, according to Canestrini. In tlie 

 Norwegian specimens just mentioned the average is 19 % of the lengtb of tbe body. 



' Sometimes, though seldom, 5 or 7, according to v. Dt)BEN and Koren. 



•'' Sometimes, though seldom, 5 or 6, according to v. DOden and Koren. 



■' 23 or 24, according to v. DOuen and Koren. 



