472 CALIFORNIA ACADEMY OF SCIENCES. 



yond the eye; lower lip ending in two small barbels. 

 Breast and belly entirely covered with skin. 



Dorsal fin when dej^ressed reaching the adipose fin. 

 A rather broad naked area between the dorsal and adi- 

 pose fins. 



Brown; a series of large dark spots along the sides, 

 with a corresponding series of smaller spots on the back 

 and below; center of the lower fins blackish; caudal and 

 dorsal fins marbled with dark. 



Head 3; depth 24; D. I, 7; A. 7; Lat. pi. ff 



Three specimens .02 m. Uraguay. Professor Wyman. 



463. Corydoras punctatus, 



Calaphr actus puiictalua Bloch, pi. 377, tig. 2; Block & Schneider, 



"Syst. Ichthyol. 108," 1801; Lacepede, Hist. Nat. Poiss. v, 125, 



1803 (Surinam). 

 Hoplisoma punctata Swainsou, Nat. Hist. Fish. etc. ii, 304, 1839 



(name oulj^). 

 Callkhthys punctutu!^ Gtinther, Cat. Fish. Brit. Mus. v, .329, 1864 



(Essequibo). 

 Corydafi jiunctatuu'Ei^enw.. & Eigenm. Proc. Cal. Acad. 2d Ser. i, 



166, 1888 (Jose Fernandez). 

 Co?-i/(loras (jeolfroy LidCi'-pf'de, Hist. Nat. Poiss. v, 147, 1803 (loc.?). 

 Co7-i/doras amhiacus Cope, Proc. Acad. Nat. Sci. Philad. 1871, 280 



(Ambjnacu Kiver). 

 Gasterodcnnun amhiacns Coj^e, Proc. Am. Philos. Soc. xvii, 1878, 



681 (Nauta). 

 Habitat: Guiana; Solimoens and Marafion. 



Corydoras amhiaciis Cope, is probably the male of jninc- 

 tatus. The description of that species agrees with the de- 

 scription given by Gtinther and with our specimens. 



Short and deep; head as deep as long; profile very 

 steep, rounded above and in front of the eyes; fontanel 

 elongate, extending into the occipital bone; the width 

 of the occipital equals its length to the tip of the process, 

 its margins regularly concave. A conspicuous mucous 

 canal extends from the anterior nares back and down 

 behind the eye. 



Eye large, lA in the snout, '3h in the head, 1§ in the 



