404 ATnEKIXTB.!;. 



5. Atherinichthys alburnus. 



^- ~ 1 1^- ^- li- L- 1^^- 10^- I^- transv. 20. 



Similar to B. latielavia. The base of the ventral fins falls verti- 

 cally below the origin of the anterior dorsal fin. The height of 

 the body is contained eight times and a half in the total length, the 

 length of the head six times. The diameter of the eye is one-sixth 

 or one-fifth of the length of the head, less than the width of the 

 interorbital space, and not quite one-half of the extent of the snont. 

 The silveiy streak occupies four series of scales. 



Seven inches long. 



Magellan's Strait. 

 a-d. Adult and half-grown : bad state. Magellan's Strait. Presented 

 by the Lords of the Admiralty. 



6. Atherinichthys humboldti. 



Atherina humboldtiana, Ctw. Sf Val. x. p. 479. pi. 306. 

 vomeriiia, Cuv. ^- Val. x. p. 481. 



D-5|,^, A..^„. L.lat.50. 



The anterior dorsal fin is opposite to the end of the ventrals. The 

 height of the body is one-fifth of the total length, the length of the 

 head one- fourth ; the diameter of the eye is one-sixth of the latter, 

 and one-half of the extent of the snout, which nearly equals the width 

 of the interorbital space. {Val.) 



Mexico. 



The typical specimen is in the Berlin Museum. 



7. Atherinichthys bonariensis. 

 Atherina bonariensis, Cur. Sf Val. x. p. 400. 



D. 5 I -^. A. ~. L. transv. 12. Vert. 50. 



I 9-11 10-18 



The anterior dorsal is opposite to the vent, somewhat in front of 

 the commencement of the anal ; the posterior is above the hinder 

 half of the latter. The height of the body is contained six and a 

 half times in the total length, the length of the head four and a half 

 times ; the diameter of the eye is one-sixth of the latter. ( Val.) 



Buenos Ayres. 



Atherina Ikhtenste'mu, Cuv. & Yal. x. p. 476, is probably merely 

 a very large specimen of this species. The typical specimen is from 

 Montevideo, nineteen inches long, and preserved in the Berlin Mu- 

 seum. 



8. Atherinichthys brasiliensis. 



Atherina brasiliensis, Quay ^ Gaim. Voy, Uran. Poiss. p. 332 ; Cuv, 



Sf Val x. T). 467. 

 macroplithalma, Agass. in Spix, Pise. Brasil. p. 136. pi. 47. fig. 1. 



D. 4-5 I g^g. A. ^^. L. lat. 38. L. transv. 8. 



The origin of the anterior dorsal fin is opposite to that of the anal. 

 The height of the body is contained five times and a third in the 



