772 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



The origin of the ventrals is direct!}' under that of the dorsal. The 

 tips of the ventrals reach from tive-sixths to one-half of the distance 

 from their base to the front of anal. 



Family ERYTHRINID^. 



i8. HOPLIAS MICROLEPIS (Giinther). 



Four specimens from Guayaquil do not differ to any appreciable 

 extent from specimens from Panama. 



H. inicrolepix differs from //. maloharicus ovX^ in having a greater 

 number of scales. This difference, though slight, appears to be very 

 constant. Only two specimens of the latter species collected at Breves 

 and Mora], Tocantins River, Brazil, are at hand for comparison. 



11. mlcrolepis has 42 lateral line scales; 12 scales in a series running 

 obliquely from base of ventral to base of dorsal; 13 series across back 

 in front of dorsal from one lateral line to the other, not counting the 

 pore-bearing scales or the few crowded scales in front of dorsal; 11 

 series counting in the same way behind dorsal; and 16 or 17 in a median 

 line from occiput to dorsal. II. malaharicus has 38 lateral line scales; 

 11 scries from ventral to dorsal; 11 series across back in front of 

 dorsal; 9 behind dorsal; 11 from occiput to dorsal. There may be a 

 constant difference in number of dorsal rays. Our two specimens of 

 II. malaharicus have 15 dorsal rays, while //. inicrolepis has 13 or 1-1, 

 usually the latter number. 



Table of ineanuronenls of Hop lias microlepiii and Hopliax vtalabaricus. 



Species. 



IkijiUas 111 icrulepis. 



"opiiax 

 jfabori- 



I Hoplia>> 

 ] malt 

 cun. 



Locality Panama. 



Ecuador. 



Brazil. 



Lengtli without caudal, in millimeters 



Head in hundredths of length 



Depth 



Diameter of eye 



Width of interorbital siiace 



Length of maxillary 



Lengtli ( if siKint 



Distance from tip of snout to base of dor.sal 



Length of dorsal base 



Length of fourth dorsal ray 



Length of pectoral 



Length of ventral 



Lengtli (if caudal 



Deptli of caudal peduncle 



210 



32 



23 



4 



9 



17 



9 



50 



17 



17 



16 



17 



23 



15 



215 

 32 

 22 

 4i 

 Si 

 16 

 S 

 51 

 19 

 18 

 16 

 18 

 25 

 14 



210 



32 



21 

 4i 

 81 



16 

 8 



51 



18 



17 



17 



17 



24 



14 



161 

 33 

 23 



4i 



9 

 17 



85 

 51 

 19 

 17 

 16 

 17 

 22 

 14 



19. LEBIASINA BIMACULATA Cuvier and Valenciennes. 



Specimens taken at Callao and Eten, Peru, and at Santa Rosa, 

 Ecuador. The following description is drawn from the Eten speci- 

 mens from 15 to IS cm. in length: 



Head, 3| to 1 in length to base of caudal; depth, 3^ to 4. Eye, 

 in head; snout, •!; interorbital space, 2f ; longest dorsal ray. If; base 



