110 . APODES.—OSTARIOPHYSI. 
1. Pisodontophis daspilotus, Gilb., 1898. 
Pisoodonophis daspilotus, Gilb. & Starks, Mem. Calif. Ac. Sci. v. 1904, p. 36. 
Hab. PANAMA. 
_ This marine species is recorded by Gilbert and Starks from a fresh-water pond at 
Miraflores, Panama. 
Sub-order VI. SYMBRANCHII. 
Body elongate, eel-shaped; fins without spinous rays; no ventral fins; gill-openings confluent to form a 
ventral slit. 
Fam. 1. SYMBRANCHIDZE. 
1. SYMBRANCHUS, B1., 1795. 
Symbranchus, Giinth. Cat. Fish. viii. p. 15 (1870); Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 
1896, p. 342. 
This genus comprises four species from India, China, Australia, and Tropical America. 
1. Symbranchus marmoratus, Bl., 1795. 
Symbranchus marmoratus, Giinth. Cat. Fish. viii. p. 15 (1870); Jord. & Everm. Bull. U.S. Nat. 
Mus. xlvi. 1896, p. 342. 
Hab. Southern Mexico to Brazil. 
Sub-order VII. OSTARIOPHYSI. 
The members of this sub-order have the anterior vertebrae modified and bearing a 
chain of small bones connecting the air-bladder with the auditory organ, but they differ 
so greatly in outward appearance that it is nearly impossible to give a definition based 
on external characters. 
The principal characters of the Mexican and Central-American fishes of this sub- 
order are shown in the following synopsis :— 
Synopsis of the Mexican and Central-American Families. 
I. Ventral fins present, abdominal in position. 
A. Body protected by series of bony plates; mouth inferior, with 
expanded, sucker-like lips. . 6 + 6 + + sf 8 tot toes 1. Loricariipa. 
_ B. Body naked; mouth terminal or subterminal; 4 to 8 barbels; an 
adipose fin. 2 2. ee ee ee te et ee es 2. SILURIDA. 
