228 SfLTJRID.35. 



to, or nearly to, the end of the pectoral fin. Caudal fin slightly 

 forked. Lower parts immaculate ; caudal without cross-band. 

 Brazil; Guianas; Trinidad. 



a. Half-grown. Demerara. Presented by Dr. Hancock. — Type of 



the species. 



b, c. Adult. British Guiana. Presented by Sir P. Schomburgk. 

 d. Nest of the same, built of grasses. 



e-h, i, Tc-l. Adult and half- grown. Demerara. Purchased of Mr. 



Scrivener. 

 m-n. Half-grown. Trinidad. Presented by — Taylor, Esq. 

 o-t. Adult : stuffed. South America. 

 u, v. Adult. From the Collection of the Zoological Society. 

 w. Adult : skeleton. Presented by the Boyal College of Surgeons. 



6. Callichthys thoracatus. 

 Cuv. 8f Val. xv. p. 309. pi. 443. 



D.j|l. A.i. P. 1/9. V. 6. 



A .pair of large osseous shields between the pectoral fins. Twenty- 

 five lateral shields in the upper series, and twenty-three in the lower ; 

 five shields behind the dorsal fin join with the corresponding ones 

 of the other side, without being separated by small azygos shields ; a 

 series of about five or six azygos shields before the adipose fin. Infra- 

 orbital bone very narrow, only half as wide as the orbit. The barbels 

 extend to behind the end of the pectoral fin. Caudal fin subtruncated. 

 Lower parts immaculate ; fins blackish, the caudal with an indistinct 

 broad dark cross-band. 



Guianas; Trinidad; ? Martinique. 



a. Adult. British Guiana. Presented by Sir P. Schomburgk. 



b. Adult : stuffed. Trinidad. From the Collection of the Zoological 



Society. — Vernac. name : Cascadura, or Bush-fish. 

 c-d. Adult: skins. 



7. Callichthys longifilis. 



Callichthys longifilis, Cuv. 8f Val. xv. p. 317. 



personatus, Ranzani, Nov. Comm. Acad. Scient. Instit. Bonon. 



1842, v. p. 322. tab. 24. 



pictus, Mull. fy Trosch. in Schomb. Brit. Guiana, iii. p. 630. 



? Callichthys sulcatus*, Kncr,Sitzgsber. Wien.Acad. 1855, xvii. p. 110. 



D.||l. A. 7-8. P.^. V.6. 



A pair of large osseous shields between the pectoral fins. Twenty- 

 four to twenty-five lateral shields in the upper series, and twenty- 

 four in the lower ; four shields behind the dorsal fin join with the 

 corresponding ones of the other side, without being separated by small 



* All our specimens have a shallow groove in the humeral process for the 

 reception of the pectoral fin, although in other respects they agree better with C. 

 longifilis than with C. sulcatus. 



