Ellis : The Plated \m ^togn \ i 391 



to. Decapogon verissimi Ribeiro. 

 Decapogon verissimi RlBBlRO, Fauna Brasiliense, Peixes, IV(A), 1912, 154 (Para). 



11. Decapogon urostriatum Ribeiro. (Plate XXVI, fig. 1.) 



Decapogon urostriatum Ribeiro, Comm. Linhas Tel. Est. de Matto-Grosso ao 

 Amazonas, Annezo, No. 5, Hist. Nat. Zool., 1912, 16 (Manaos). 



[This species was described as new by Mrs. Ellis in her manuscript, 

 and as the above cited description is not readily accessible, the follow- 

 ing description may stand. — C. H. Eigcnmann.] 



3540 C. M. One, 140 mm. Manaos, Nov. 27, 1909. Coll. Hase- 

 man. 



3541 C. M. Two, 136 to 145 mm. Manaos, Nov. 27, 1909. Coll. 

 Haseman. 



Head to the end of the opercle 3.5; depth 3.5; width 4.5; D. I, 7; 



A. I, 5; lateral plates — ; eye 6 in the head, 3.5 to 3.7 in the inter- 



2 5 

 orbital. 



Deepest and widest below the dorsal spine. Dorsal profile steep 

 in front of the dorsal, thence almost straight to the adipose. Ventral 

 profile gently bowed. The caudal peduncle sharply constricted, and 

 quite narrow. Scutes leaving a naked strip in front of the anal. 

 Coracoid processes meeting below, leaving a narrow wedge-shaped 

 naked strip between them in front and a similar longer one behind. 

 The left coracoid overlaps the right in the largest specimen. 



Width of head 1.5 in its length, depressed in front; eyes lateral, 

 suborbital exposed. Fontanel making a shallow niche in the occipital. 

 Eye 1.25 to 1.5 in the fontanel. Isthmus close to the coracoid 3.5 

 to 4.5 in the head. Snout narrowly rounded, 2 to 2.2 in the head, 2.8 

 in its distance from its tip to the dorsal. Mouth narrow, slightly 

 inferior. Teeth wanting above; in a narrow band below. Two long 

 rictal barbies, the outer just reaching the opercle, the inner almost 

 reaching the posterior margin of the scapula. Two pairs of short 

 barbies and a rudiment of a third pair on the lower lip; the outer, 

 longest, half as long as the diameter of the eye. 



Scutes entirely covering the sides; four to seven azygous plates in 

 front of the adipose dorsal. Free edges of the scutes slightly ctenoid, 

 their surface hispid. 



Dorsal spine strong and flattened, 4.5 to 5 in the length. Third 

 dorsal ray longest, equal to the dorsal spine. Tip of anal reaching — 



