146 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
40 . Neetroplus carpintis Jordan & Snyder, new species. Fig. 22. 
Type, No. 6162, L. S. Jr. Univ. Mas. Locality, Laguna del Carpinte, near Tampico, Tamaulipas, 
Mexico. Collected by J. O. Snyder, January 15, 1899. 
Head 2.83 in length; depth 2; depth of caudal peduncle 6; eye 5 in head; snout 2.20; inrer- 
orbital space 2.66; longest dorsal spine 2.20; ray 1.25; longest anal spine 2; ray 1.33; length of 
pectorals, 1.40; veutrals 1.20; caudal 1.16. D.xvi, 10. A. v, 8. P.15. Scales in lateral line 27; in 
transverse series 17 ; on caudal peduncle 7. 
Body compressed, deepest part above ventrals ; dorsal outline straight from tip of snout to a 
point above anterior edge of orbit, where it is abruptly curved upward and backward to the origin of 
dorsal tin; from the latter point it gradually curves downward to base of first dorsal ray, from which 
point the descent to the caudal peduncle is abrupt; ventral outline evenly curved from snout to caudal 
peduncle. Interorbital space convex, its middle portion flattened. Orbit circular, nearer to posterior 
edge of opercle than to tip of snout a distance equal to diameter of pupil. 
Mouth oblique, lower jaw slightly projecting; lips thick ; the lower with a frenum equal in width 
to half the diameter of pup>il ; upper jaw protractile; maxillary covered by preorbital except at its 
distal end. Teeth in 2 series in each jaw, the outer series in a single row, flat or incisor-like, 
larger in front, growing much smaller posteriorly; the inner series minute, in narrow bands; all the 
teeth loosely attached, their tips brown-colored; no teeth on vomer or palatines. Gill-membranes 
forming a fold across the isthmus. Gillrakers on first arch 10; short, far apart. 
Body covered with large, weakly ctenoid scales; cheeks, opercles, and occipital portion of head 
with small cycloid scales; lower jaw, snout, and anterior half of interorbital space naked; bases of 
posterior parts of dorsal and anal fins with small scales; interradial membranes of caudal with very 
small scales on basal parts; lateral line interrupted on nineteenth row of scales, beginning again 
3 scales lower down, on the third row anterior to where it left off, and extending to base of caudal; 2 
short rows of mucous tubes on interradial caudal scales, one above and the other below the end of 
lateral line. First dorsal spine shortest, others gradually longer and heavier, each spine with a ray-like 
attachment projecting above and posterior to its tip ; first anal spine shortest, the others gradually 
longer and heavier, the fourth 3 times as long as the first; spines with distal attachments similar to 
those of the dorsal, third and fourth rays longest, extending posteriorly as far as those of dorsal; 
posterior edge of caudal somewhat convex; pectorals rounded; ventrals pointed, the outer ray much 
the longest, extending a little beyond the vent. 
