270 ME. C. TATE BEGAN ON THE 



scutes, the caudal peduncle strongly depressed, with paired dorsal and ventral series of 

 scutes, and posteriorly, at least, with only a single lateral series of scutes ; lower part 

 of clavicle and coracoid not exposed ; no anterior rudimentary ray of ventral. 



Key to the Genera. 



I. Teeth in the jaws in small or moderate number, not setiform ; a more or less distinct 



orbital notch. 



Snout rounded or pointed, not, or not much, produced 11. Loricdria L. 



Snout produced, with a long rostrum 12. Hemiodontichthys Blkr. 



II. Teeth in the jaws numerous, setiform ; orbit circular, without distinct notch. 



Dorsal opposite to the ventrals 13. Oxyloricaria Blkr. 



Dorsal opposite to the anal 14. Farlowella Eigmn. 



11- LoRICARIA. 



Loricaria (part.) Linn. Syst. Nat. (ed. x.) p. 307 (1758) ; Cuv. & Val. Hist. Nat. Poiss. xv. p. 453 

 (1840); Kner, Denkschr. Ak. Wien, vi. 1853, p. 77; Giinth. Cat. Fish. v. p. 254 (1864); 

 Eigenm. & Eigenm. Proc. Cal. Ac. (2) ii. 1889, p. 34, and Occ. Pap. Cal. Ac. i. 1890, p. 360. 



Loricariichthys Bleek. Ned. Tijd. Dierk. i. 1863, p. 80. 



Loricaria Bleek. 1. c. 



Pseudo loricaria Bleek. 1. c. 



Parahemiodon Bleek. 1. c. 



Hemiloricaria Bleek. t. c. p. 81. 



Pseudo hemiodon Bleek. 1. c. 



Rineloricaria Bleek. 1. c. 



Body elongate ; head depressed, with pointed or rounded snout ; lower surface of 

 head in great part naked ; abdomen wholly or partly covered with large or small plates 

 or sometimes with very small granules or naked ; orbit with a more or less distinct 

 posterior notch ; teeth bifid, not setiform, in small or moderate number, sometimes 

 few and well developed, sometimes rudimentary and more numerous. Dorsal with 

 I 7 rays, originating above or a little behind the ventrals, anal with I 5, pectoral 

 with I 6, ventral with I 5. Caudal emarginate, one or both of the outer rays often 

 produced. Vertebra 5 + 5 + 23 (in L. typus) and 5 + 6+25 (in L. cataphracta) ; ribs 

 present, slender. 



Eivers of S. America. 



Insufficiently described species belonging to this genus are : — 



Loricaria brunnea Hancock, Zool. Journ. iv. p. 247 (1828) (allied to L. maculata 



Bl.). 

 Loricaria platyura Mull. & Trosch. in Schomburgk, Reis. Brit. Guiana, iii. p. 631 



(1848). 

 Hemiloricaria caracasensis Bleek. Ned. Tijd. Dierk. i. 1863, p. 81. 

 Loricaria bransfordi Gill, Proc. Ac. Philad. 1876, p. 338. 



