574 PROCEEDINGS OF THE ACADEMY OF [Oct., 



P. cordovcE has but a single scute bordering the supraoccipital on each 

 side behind, while the present species has two. P. cordovce has the 

 mandibular ramus U in the interorbital, while the present form 

 shows it 2|. 



(Named for the Madeira River.) 



LORICARIIN^. 

 Farlowella smithi sp. nov. Fig. 24. 



Head, measured to hind edge of gill-opening, 4^; depth about 

 3| in head; D. i, 6; A. i, 5; P. i, 6; V. i, 5; scutes 34 in lateral 

 series medianly from opercle to caudal base, and one more on latter; 

 3 scutes between dorsal and anal origins; 7 predorsal scutes to 

 supraoccipital; head width 3| in its length; head depth at occiput 

 4|; snout 1|; interorbital 4|; dorsal spine If; anal spine If; 

 pectoral spine 2|; ventral spine 3|. 



Body slenderly elongate, greatly depressed, greatest depth at occi- 

 put and that at dorsal and ventral origins slightly less. Caudal 

 peduncle extremely elongate, depressed. 



Head, moderately long, depressed, as seen from above rapidly 

 tapering into elongate and slender rostrum. Snout depressed, its 

 basal width 2f in its length. Eye small, rounded, slightly ellipsoid, 

 high, well posterior in head, and 2| in interorbital. Mouth moder- 

 ately broad, placed about last third in head, width of disk about 

 equals interorbital. Disk of mouth rounded, edge finely and minutely 

 fringed all around. Surface of lower lip finely papillose. Within 

 upper jaw medianly large, fleshy papilla. Teeth slender, bent over 

 at ends, bifid, about 50 in upper jaw and 40 in lower. Upper buccal 

 fold inside mouth broad. Mandibular ramus about 2f in inter- 

 orbital. Nostrils together, anterior with elevated cutaneous rim 

 and about half conceals equal-sized posterior, placed just before 

 eyes with internasal space about half that of interorbital. Inter- 

 orbital wide, very slightly convex. Opercle about twice eye diameter, 

 surface obsoletely rugose. 



Gill-opening small, very oblique, extends forward about opposite 

 middle of eye. Isthmus broad, depressed, width about equals that 

 of mouth disk. 



Scutes all minutely spinulose. Down back medianly, from 

 occipital to plate just before dorsal origin which entire, narrow 

 non-spinulose strip. After dorsal this narrow naked strip continued 

 to caudal, also similar one on lower surface of caudal peduncle from 

 behind anal to origin of lower caudal lobe. Costal plates form 



