Holt and Calderwood — Report on the Rarer Fishes. 



425 



Callionymus maculatus, Bonaparte. (Littoral.) 



Callia 



'lymus maculatus^ 





lyra, 

 dracimeulus 



cithara, 



reticulatus, 



," figs. 2 and 3. 



Bonaparte, "Faun, Ital. Pesc 



GuNTHER, "Ann. Mag. Nat. Hist.," 1867, vol. xx., 



p. 290. 

 Day, "Fish. Gt. Brit.," vol. i., p. 177. 

 LiLLEjBORG, " Sverig. o. Norg. Fisk," p. 666. 

 GiJNTHER, "P. R. S. Edinb.," xv., p. 211. 

 Holt, " Sci. Proc. Roy. Dub. Soc," vii., p. 218. 

 Smitt, "Hist. Skand. Fish.," ed. 2, p. 279. 

 Risso, "Ich. Nice," p. 113. 

 Brunner, " Pise. Mass.," p. 17. 

 CuviER, "RfegneAnim." 

 CuviER et Valenciennes, 



Hist. Nat. 



Poiss.," 



vol. xii., p. 280. 



CuviER et Valenciennes, "Hist. Nat. Poiss.," 

 vol. xii., p. 284. 



Diagnosis op Species. — The horizontal diameter of the eye rather longer in the 

 male, rather shorter in the female, than the length of the snout, without the 

 protrusible mouth. 



This appears to be the most salient character distinguishing this from the com- 

 moner species, C. lyra, in which the length of the snout considerably exceeds the 

 horizontal diameter of the eye in both sexes, except in the very youngest stages. 



So closely allied are the two forms that it seems to us that any useful descrip- 

 tion of the one must contain frequent comparison with the other. Moreover, in 

 both, the male differs so much from the female that it is necessary to describe the 

 sexes separately, and though this has been excellently done by Lilljeborg, British 

 authors have hitherto contented themselves with pointing out the difference in 

 tlie length of the first dorsal fin and in the colouration. These features, however, 

 are only apparent in adults ; and a description of the pigmentation is chiefly 

 valuable to those who have the opportunity of observing specimens in the fresh 

 condition. 



The two species differ considerably in size, the commoner, C. lyra, attaining 

 a length of about twelve inches, whilst C. maculatus appears never to greatly 

 exceed a length of six inches. Hence it follows that the more conspicuous features 

 of sexual dimorphism are attained at different sizes, so that a male of the smaller 

 form exhibits the full adult characters at a size at which one of the larger is still in 



TEANS. EOT, DUB. SOC, N.S. VOL. V., PAET IX. 



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