408 FISHES OF WESTERN SOUTH AMERICA 
Florida keys, West Indies to Uruguay, La Plata, and the Peruvian Amazon 
16155, 5, 28-163 mm., Gosulimacocha, Allen, October, 1920. 
16156, 2, 103-157 mm., Iquitos, Morris, 1922. 
16157, 8, 27-120 mm., R. Huallaga, Yurimaguas, Allen, November, 1920. 
16163, 4, 16-27 mm., Yarinacocha, Allen, September, 1920. 
) 
Genus 216: ACHIROPSIS Steindachner 
Achiropsis Steindachner, 1876, Sitzb. KIX. Akad. Wiss. Wien, LX XIV, 158; 
Eigenmann and Higenmann, 1891, Proc. U. 8. Nat. Mus., XIV, 73; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 483. 
Type: Solea natterert Steindachner 
Rio Negro to the Huallaga 
Gill-openings small, narrow slits on both sides of the head; snout produced 
in the form of a pendant to the origin of the ventral fins; scales well-developed, 
without fringes; both ventral fins well developed. 
531. ACHIROPSIS NATTERERI Steindachner 
Solea (Achiropsis) nattereri Steindachner, 1876, Sitzb. KK. Akad. Wiss. Wien, LAXIV, 158. 
Achiropsis nattereri Jordan and Goss, 1886 (1889), Rept. U.S. Fish Comm., XTV, 318; 
Eigenmann and EKigenmann, 1891, Proc. U. 8S. Nat. Mus., XIV, 73; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, ITT, 483; 
Chabanaud, 1927, Ann. Mag. Nat. Hist., (9), XX, 528, note; 
Chabanaud, 1928, Ann. Mag. Nat. Hist., (10), I, 640; 
Fowler, 1939 (1940), Proc. Acad. Nat. Sci. Phila., XCI, 279, one, 225 mm., Contamana. 
Rio Negro to the Huallaga basin 
16158, 1, 209 mm., Rio Huallaga, Yurimaguas, Allen, November, 1920. 
16159, 2, 150 and 165 mm., Iquitos, Morris, 1922. 
16160, 3, 129-193 mm., Iquitos, Allen, 1920. 
The present and preceding species are members of that not insignificant marine 
relict fauna which extends up the Amazon and its Peruvian affluents for three 
thousand miles or more. 
Order PLECTOGNATHI 
Family XXIV: Tetraodontidae 
Genus 217: COLOMESUS Gill 
Tetrodon Bloch and Schneider, 1801, Syst. Ichth., 505; 
Giinther, 1870, Cat. Fish. Brit. Mus., VIII, 286. 
Les Batrachopes Bibron, 1855, Rev. Zool., (2), VII, 279, psillacus. 
Batrachops Bibron, 1855, Rev. Mag. Zool., VIII, 280, preoccupied, 
Colomesus Gill, 1884, Proce. U. 8. Nat. Mus., VII, 422, pszttacus; 
Eigenmann and EKigenmann, 1891, Proc. U.S. Nat. Mus., XIV, 73; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, ITI, 484; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 528. 
