Cope.] '^ ' ^ [Aug. 19, 



* 



Ckekicichla LUCIUS. Cope sp. nov. 



Eadii D. xix. 13 ; A. III. 10. Squamation 4—64—13. Depth of body 

 one-seventh of total length. Length of head three and a half times in 

 the same. Head elongate, pike-like, the mandible strongly projecting, 

 the outer series of teeth not larger than the others. Orbit, diameter less 

 than length of muzzle, nearly five times in length of head, equal inter- 

 orbital width. Length of longest dorsal spine three-fourths that of the 

 preni axillary bone with spine. Scales large, eight rows on the cheek. 

 Maxillary bone reaching the anterior fourth of the orbit. Ventral and 

 pectoral fins marking the eleventh dorsal spine. 



Color olivaceous, above brown. A darker band from muzzle to opercular 

 angle. A black spot at base of caudal radii, edged with yellow. Dorsal 

 and anal fins unspotted. Length six inches, w^idth of head behind .75 inch. 



This species is near the C. lacustris of Castelnau's fine work, and differs 

 in the following points. The latter is a less elongate species, the depth 

 being only one-sixth the length. The scales are less numerous, counting 

 4—51 — 11. There is a brown spot on the middle of the dorsal fin, and 

 some longitudinal shades on the posterior part not found in the G. lucius. 



Both species were sent by John Hauxwell from the tributaries of the 

 Upper Maranon, in Equador. 



ACAKA FLAVILABRIS. Cope Sp. nOV. 



Three series of scales on the cheek. Radii D. xvi. 10. A. III. 8 squam- 

 ation 3 — 26 — 9. Depth 2.25 times, head three times in length without 

 caudal fin. Orbit, diameter a little exceeding muzzle, one-third length of 

 head ; inter-orbital width two-fifths the same. The length of the longest 

 dorsal spine is equal to that of the muzzle. 



Color brown, several darker cross shades across the dorsal region ; a 

 large black ocellus on lateral line. No other spots. Fins dusky. Lower 

 lip yellow, Total length four inches; depth of head 1.1 inch. Front 

 slightly convex in profile. 



From near Pebas, Ecuador, John Hauxwell' s Collections. It was asso- 

 ciated with several specimens of Mesops iaeniatiis Giinth. (Catals. B. M. 

 iv. p. 312), from the game locality. In the same collection occurred Bivu- 

 lun micropus Steind. vm\, Sternopygus macrurus, S. mrescens and Carapus 



fanciatus. 



TETRAODONTID^. 



Tetraodon psittacus L. 



CneillcMTiys (Milll). Steind. Verb. Zool. Bot. Ver. Vienna 18, p. Tab. 



This species was brought by Natterer from some of the fi-esh waters 

 of Brazil, according to Steindachner. It occurs in the present collection 

 from Equador, from a point 2,300 miles from salt water, 



EXPLANATION OF WOOD CUTS. 



Fig. 3. Myletes lippincottianus. Cope, mouth showuig deutition. 



Fig. 4. Odontostilbe fugitiva, Cope, ibid. 



Fig. 5. Stethaprion erythrops, Cope, natural size ; 5a, mouth with dentition. 



Fig. 6. Plethodectes erythrurus, Cope, natural size ; 6a, mouth with dentition. 



Fig. 7. Bceboides bicornis. Cope, mouth with dentition. 



Fig. 8. Hypoptopoma bilobatum. Cope, natural size ; 8a, same seen from behiw. 



