282 On Fishes from the River Ucagali, Peru. 



Upper lip narrow ; lower very broad, smooth, with entire 

 edges ; teeth minute, on each side about 8 in the upper jaw 

 and 12 in the lower. 32 scutes in a longitudinal series, 

 20-22 + 10-12 ; lateral keels sharp, separate; scutes in front 

 of dorsal fin with vestigial keels; lower surface of head 

 naked ; abdomen with 2 series of plates between the lateral 

 series ; anterior plates smaller, extending to level of middle of 

 gill-opening ; an anal plate, bordered anteriorly by 3. First 

 dorsal ray § the length of head ; pectoral spine reaching 

 base of pelvic fin, which has the first branched ray longest ; 

 upper caudal ray produced. Breadth of body at level of 

 first anal ray 4 in the distance thence to the caudal. Head 

 and body with dark spots and blotches; fins, except the 

 anal, with series of small dark spots. 



Two specimens (males), 185 and 220 mm. in total length. 



In the structure of the lower lip this species resembles 

 males of L. ti/pus, Bleek. In other characters it is nearer 

 L. maculata, Bloch, but has a larger head, a shorter tail, and 

 the dorsal and anal fins less elevated. 



11. Rhineloricaria konopickyi } Steind. 



12. Loricaria carinata, Casteln. 



13. Acara tetramerus, Heck. 



A. duopunetata, Haseman, seems to be a synonym of 

 A. tetramerus. The two other supposed new species of this 

 genus described by Haseman (Ann. Carnegie Mus. vii. 1911), 

 from the Guapore*, viz. A. guaporensis and A. award, are 

 obviously the young and adult of one species, closely related 

 to A. paraguayensis, even if it be distinct. 



Apistogramma, nom. no v. 



The recently published second volume of the ' Index 

 Zoologicus' includes the generic name Ileterogramma, 

 Guenee, 1854. I therefore propose Apistogramma as a 

 substitute for Ileterogramma, Regan, 1906. This genus 

 includes four species from the La Plata, A. trifasciatum, 

 Eigenm. & Kennedy, 1903, A. boreUii, Regan, 19.06 

 (//. ritense, Haseman, 1911), A. corumbw, Regan, 1906, 

 and A. pleurvtwnia, Regan, 1909 (//. borettii, Haseman), 

 two from Guiana, A. steindachneri, Regan, 1908, and 

 A. orfmannt, Eigenm., 1912. There are perhaps four 

 species known from the Amazon, viz., A. amcenus, Cope, 

 1872, A. tceniatum, Giinth., 1862, A, pertense, Haseman, 

 1911, and A. agasstzii, Steind., 1875. 



