212 Mr. C. T. Regan— yl Revision 



not in contact below, eacli separated by 1^ scutes from base 

 of pelvic fin. A lateral series of 4 or 5 dark oblong spots, 

 the third below the adipose fin ; a similar series of spots on 

 the back ; dorsal dusky anteriorly and usually with spots on 

 the rays ; caudal usually barred with series of spots ; lower 

 fins immaculate or anal sometimes with a spot. 



1-4 (types). 50 mm. La Plata. Doria. 



5. Corydoras paleaius:. 



CullicUhys paleatus, Jenyns, Zool. ' Beagle,' Fish. p. 113 (1842). 

 Corydoras marmo7'atus, Steiud. Denkschr. Akad. Wien, 1879, p. 26, 



pi. V. fig. 1. 

 Corydoras paleatus, Eigenm. & Eigenm. Occ. Pap. Calif. Acad. i. 1890, 



p. 471. 

 ? Corydoras nurofrenatus, Eigenm. & Kennedy, Proc. Acad. Phil ad. 



1903, p. 507; Eigenm. & Ward, Ann, Carnegie Mus. iv. 1907, 



pi. xxxviii. fig. 4. 

 Co7-ydoras ehi-hardti, Steind. Anz. Akad. Wien, 1910, p. 60. 

 ? Corydoras meridionalis, Pt. von Ihering, Rev. Mus. Paulist. viii. 1911, 



p. 381. 

 ? Corydoras naffereri triseriatus, von Ihering, t. c. p. 386. 

 ? Corydoras Jlaveolus, von Ihering, t. c. p. 387. 



Depth of body 2g to 3 in the length, length of head 3^ to 

 3^. Snout as long as or a little longer than postorbital part 

 o£ head ; diameter of eye 4 to 5 in the length of he.-id, inter- 

 orbital width 2 to 2|. Suborbital narrow ; barbel rarely 

 reaching gill-opening. Dorsal I 7-8 ; spine f to as long as 

 head; soft rays decreasing from first, which is longer than 

 spine; base nearly equal to distance from adipose fin, which 

 is preceded by 2 or 3 median scutes. Anal I 6. Pectoral 

 spine extending to or beyond base of pelvics. Scutes 22- 

 24/20-22; humeral shields not in contact below, each sepa- 

 rated from base of pelvic fin by one scute. Three oblong- 

 dark spots along middle of side, respectively below the dorsal 

 and adipose fins and on the caudal peduncle, connected with 

 less definite spots on the back ; both series of spots may 

 unite to form longitudinal bands ; dorsal dusky anteriorly 

 and with spots on the rays ; caudal barred ; lower fins each 

 with a single spot ; sometimes some or all the fins immaculate. 



La Plata; Rio Grande do Sul ; Sta. Catharina. 



1 (one of the types). 35 mm. Cambridge Mus. 



2-3. 70 mm, Buenos Ayres. White. 



4-6. 60 mm. Parana. Salmin. 



7-9. 25 mm. R. Grande do Sul. von Ihering, 



10-11. Dried. Cordova. 



12 (co-type of C. eJirhardti). Joinville. Steiudachner. 



