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PROCEEDINGS OF THE ACADEMY OF 
times and a lialf in the total length. Snout rounded ; jaws equal ; gape of 
mouth somewhat oblique ; posterior extremity of maxillary extending to a ver- 
tical line intersecting the anterior rim of the orbit. Second dorsal fin higher 
than the first. Tips of ventrals not reaching the vent. Extremities of pectorals 
stretching somewhat beyond the ventrals. Caudal fin posteriorly rounded. 
Log. — Mouth of the Rio Grande del Norte (Rio Bravo), and collected by 
John H. Clark, under Maj. Emory. 
16. Ophidion josephi. — Head contained six times in the total length. Eye 
moderate ; its diameter contained four times in the length of the side of the 
head. Posterior extremity of maxillar bone extending to a vertical line 
drawn across the posterior rim of the orbit. Origin of dorsal fin situated at 
some distance behind the base of the pectorals. 
Log. — St. Joseph's Island, Texas, collected by G. Wurdemann. 
17. Belonb scrutator. — Lower jaw longer that the upper ; head constituting 
about the third of the total length. Middle region of cranium depressed and 
scaly ; gill covers, branchial apparatus, cheeks and base of lower jaw covered 
with scales. Eye large, sub elliptical. Anal fin larger than the dorsal ; caudal 
posteriorly subcrescentic, with its lobes subequal. 
Log. — Specimens were collected at the Brazos, Texas, by John H. Clark, 
under Maj. Emory; and at St. Joseph's Island, Texas, by G. Wurdemann. 
18. PiMELODUS VULPES. — Allied to P. affinis, from which it chiefly differs by 
a shorter and deeper anal fin, smaller spines at the anterior margin of the 
dorsal and pectorals, and perhaps a caudal less deeply furcated. The ventrals 
are rather broad and short, being also inserted further apart from the origin of 
the anal, since their posterior extremity extends to the anterior edge of the 
latter fin and no further. The posterior extremity of the adipose fin is nearly 
even with the termination of the anal. 
Log. — Fresh water, rivers and streams of Texas ; specimens collected by 
John H. Clark, under Col. J. D. Graham, and by Dr. C. B. Kennerly, under 
Maj. Emory. 
19. P(EciLiA LiNEOLATA. — Head small and pointed, entering four times and a 
half in the total length. Dorsal fin of the female longer than high ; its ante- 
terior margin being nearer the extremity of the snout than the insertion of the 
caudal. The caudal posteriorly rounded ofl", entering fours times and a half in 
the total length. Anal fin small, inserted opposite the posterior third of the 
base of the dorsal. The ventrals are small, inserted in advance of the ante- 
rior margin of the dorsal. 
Log. — Specimens were collected at Brownsville, Texas, by Capt. Vanvliet, 
and at Fort Brown, Texas, by John H. Clark, under Maj. Emory. 
20. LiMiA P(ECiLoiDES. — Body very much compressed, deep upon its middle. 
Head constituting about the fourth of the total length. External row of teeth 
slender and contiguous. Dorsal fin larger in the male than in the female ; its 
anterior margin being nearer the extremity of the snout than the posterior 
edge of the caudal, which is convex. The anal fin, in the female, is larger 
than the dorsal, and inserted posteriorly to the latter ; whilst in the male the 
same is situated opposite the middle region of the dorsal. The ventrals are 
small in both sexes, and inserted in advance of the anterior margin of the dorsal ; 
the pectorals being rather short and broad. 
Log. — Indianola, Texas ; specimens collected by John H. Clark, under Col. 
J. D. Graham. 
21. Limia venusta. — Body fusiform, elongated and compressed ; the head 
forming somewhat less than the fourth of the total length. External row of 
teeth slender and acute, a good deal larger than in the preceding species ; the 
snout is also thicker and less depressed. Dorsal fin larger than the anal, and 
[July, 
