394 



ATHERINin.i:. 



lengtli of the snout, is two-sevenths of the length of the head, and 

 rather more than the width of the interorbital space. Snout pro- 

 duced, with the cleft of the mouth oblique ; the maxillary extends 

 to below the anterior margin of the eye. No conspicuous teeth. 

 The silvery streak occupies the fifth series of scales (from the base 

 of the first dorsal) and the adjoining halves of the fourth and sixth. 

 Mediterranean. Black Sea. Canaries, 



a-c. Adult. Dalmatia. 



4. Atherina lacustris. 

 Lattarina. 



Atherina lacustris, JBonap. Faun, Ital, Pesc. ; Martens m Wicpn. Arch. 

 xxiii. p. 167. taf. 9. figs. 1, 2. 



D. (5) 6-8 I y^j. A. ^,,3'^^^^ . L. lat. 60. L. transv. 10-11. 

 Vert. 43-44. 



The origin of the anterior dorsal fin is above the middle of the 

 ventral. The height of the body is one-eighth of the total length, 

 the length of the head one-fifth ; the diameter of the eye is two-fifths 

 of the length of the head, and longer than the snout, the extent of 

 which equals the width of the interorbital space. Snout moderately 

 produced, with the cleft of the mouth oblique ; the maxillary extends 

 to below the anterior margin of the eye. Teeth distinct in the jaws, 

 none on the vomer. The silvery streak appears to occupy the fifth 

 series of scales and the adjoining halves of the fourth and sixth. 



Lakes of Albano and Nemi. 



Martens has given a most accurate and detailed description of this 

 species, and has shown some remarkable variations in the number of 

 its fin-rays, which, if observed in single individuals, might have led 

 to the distinction of several species. When, however, he states that 

 the number of the transverse series of scales varies between forty- 

 six and sixty, we suppose that the low numbers are only to be ob- 

 served exceptionally in specimens in which the scales are disarranged 

 in some way or other. The elongated body of this species and the 

 number of its longitudinal series of scales clearly indicate that the 

 number for the lateral line is the same as in A. hepsetus and A. 

 hoyeri. If, however, the low numbers should occur as frequently as 

 the high ones, it becomes a question whether the lakes above-named 

 are not inhabited by two species, one with larger, the other with 

 smaller scales. The former might bo A. vwchon. 



5. Atherima boyeri. 



Joel (France) ; Cabasuda (Ivica ). 



Hepsetus, Rondel, i. lib. vii. c. 10. p. 215 ; Gesncr, Aquat. iv. p. 71. 



Lavaronus, Gesner, I. c. p. 73 ; Aldrov. ii. cap. 37. p. 218 ; Jonst. Pise. 



i. art. 19. p. 52. 

 Auguella, Willughh. iv. c. 2. p. 209 ; Ray, Syn. p. 79. 

 Atherina hepsetus, var. 3, De In Roche in Ann. Mns. xiii. p. 357. 



