300 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 95 
TABLE 15.—Certain measurements, expressed in hundredths of the standard length, 
recorded for two subspecies of Cyrtocharax magdalenae 
venezuelae atratoensis 
Characters measured U.S.N.M. 
Paratype | Holytype | Paratype No. 1664 
' holotype) 
Standard lengthin millimeters. 22220202220 ee 160 203 293 298 
Meng thioiihead oe sae aay Rie oN Tera er RIE 28. 5 28. 8 28. 3 29.3 
Greatest: depGh old yee sees acne eens i ne CE 35. 0 33. 8 35.8 32.9 
Length of snout (measured from front of bony orbit) __- 6. 88 7.73 7. 51 8.09 
Diameter Ol Sve uss Wwe MA NAA MSA Maar AL RECA n 4. 66 4, 43 4.10 4.02 
IDIAMELETOMDOM GOLD VG eee eee ena eae eg 6. 88 6. 90 6. 48 6. 54 
Width of fleshy interorbital space__._.___.__--________ 9. 06 9. 70 9. 90 9, 23 
Length of postorbital part of head____------_--._---._- 15.3 16. 2 15.6 15.8 
Distance from tip of snout to rear of maxillary or 
LEH SE Of MOU EG eye NCEE SNL e MRAM B SON Caseen See 19.7 20. 2 21.6 21.1 
Length of caudal peduncle, from base of last anal ray 
TOMMIGCAUG aD ASE AAA AAU Renee eee yeeeaaL oe aU 11.3 12.5 11.6 11.1 
Least depth of caudal peduncle____--_________________- 8. 94 9.02 8. 20 8.56 
Meng chtoan alifinib ase ears oem eik iret a ecm Renee evel 41.3 45.3 44.2 41.6 
Length of longest ray of anal fin-_-.-...-...-__________ 14.4 15.0 13.0 13.8 
Length of longest ray of dorsal fin...--.-_-_--_________ 26.9 27.2 22.5 21.1 
Length of longest ray of pectoral fin__-_-___-__________ 19.4 20. 5 7 16.8 
Length of longest ray of pelvic fin________-_-__________ 15.0 15.0 13.3 12.0 
Length of longest ray of upper caudal lobe__-_________- 2242, 21.2 a KEES Sa Raney ae CCL HL 
Length of longest ray of lower caudal lobe___-_________-_ 23. 4 21.7 1S LAIN Peep eI CR VS 
Distance from snout to dorsal origin._______-__________ it 6 51.5 50.0 53. 0 
Distance from snout to anal origin__.______--_________- 50.6 54.2 55. 6 51.0 
Distance from snout to adipose origin. _______________- 86.9 90. 6 86. 7 86.6 
Distance from snout to pelvic insertion_______._-______ 38. 1 38. 9 39. 2 36. 9 
Distance from snout to pectoral insertion_____________- Dine, 26.6 27.3 27.5 
Distancefrom(snout Lo anvswee sree. lee enlt meunnlie 48.8 DNA gH Paul BEN Aa 49.6 
Distance from tip of supraoccipital process to dorsal 
ULES SANS NESE Se LOEAD DURAN IE AON ab) UGMNE RCO aN nM hele tou oda sks 28.1 29. 1 27.0 29. 2 
Distance from snout to tip of supraoccipital process____ 23.7 22.7 23. 2 25. 5 
Body compressed, greatest depth 2.9 to 3.2 at dorsal origin, head 
about 3% to 3% in standard length; head depressed over snout and 
eyes, then abruptly curved upward, so that the profile from snout to 
supraoccipital is greatly concave, then convex along rear of supra- 
occipital process; upper jaw at front of premaxillaries with a pair of 
canines followed on each side by about seven short conical sharp- 
pointed teeth, then another canine, the inner row of teeth on the pre- 
maxillaries is represented by two short canines between the pair of 
canines on each side; the short, sharp-pointed conical teeth on the 
maxillary numerous, in a single row; the teeth on the lower jaw in a 
single row, a short pair of conical teeth on dentaries at symphysis, 
then four pairs of canines, the next-to-last pair being long and fanglike; 
the posterior half of the dentary equipped with numerous short 
conical teeth in a single row; no teeth on palatines; the anterior part 
of the upper half of the first gill arch with 7 or 8 platelets, then 2 or 3 
gill rakers, plus one at the angle and then 5 or 6 on lower half of the 
arch; the longest raker about equal to diameter of the pupil; the 
