C'uhlnl Geneva Cicliln, Clirt- toltraiK-liu^, (('r. 2.')"5 



1 . Clid'lobranchus favescens. 



Chcfiohranvhua flovescena, Heck. Ann. Miis. Wien, ii. IStO, p. 402; 



(tiintli. t'at. Fisli. iv. |>. ;J10 ( 18(12) ; SU-iud. Sitzb. Ak. Wion, Ixxi. 



IS?."), p. 12S, pi. vi. ; IViU'j,'!-. .Mi^ni. Soc. Zuol. Frauce, xvi. I'JD.i, 



p. 200(l!tU-l). 

 C/uetubnint'/tus bninnettx, IFeck. t. c. p. 40") ; Ctiiiith. /. c. 

 Cht'uutjin ucat/oleitxis, Ca.^tt'ln. Aniin. Am. 8iul, I'ois.s. p. lo, pi. vi. fig^. 2. 

 Acara ifctii/a/(ii.'<i'>, (Jiiiith. /. c. p. 2HI. 

 Cluetiibranchus mhustus, Giintli. t. c. p. 810. 

 Gco])h(i</iis fjadii)ii/i)ii.i, Cope, Prof. Ac. Philad. 1871, p. 2.51, pi. xi. fi-r. 1, 



and i'n.c. Am. Phil. Soc. xvii. 1878, p. 697 ; Pellegr. t. c. p. 190. 



Depth of body 2-25 i» the length, length of head 2i. 

 l^ianieter of eye 4 in the length of head, length of snout .'J], 

 depth of pr?eorbital 4i— Ig, interorbital width 2.',. Maxillary 

 extending to below anterior margin of eye. Check with 5 or 

 G series of seales. Siales 27-29 '\\ , 2 between last dorsal 

 spine and lateral line. Dorsal XIII 13-14, the spines 

 increasing in length to the last, which is nearly ^ the length 

 of head. Anal III 11-12. Pectoral extending beyond 

 middle of anal. Candid peduncle \-f^ as long as deep. 

 Olivaceous ; a large daik blotch on the middle of the side ; 

 vertical fins with alternate light and dark stripes. 



R. Amazon; Guiana. 



1. (2ti8 nnn.) Brit. Guiana. Sir R. Sehinubnrgk. 



2. (25'"i uiin.) TelliJ. Prof. A. Ag.issiz. 



2. Chcetobranchus semifasciatus. 



Ch(Ptobranchu8 aemifasciatus, Steind. Sitzb. Ak. "Wien, Ixxi. 1875, 

 p. 1.30, pi. vii. ; Pellegr. M(5m. Soc. Zool. France, xvi. I'.i03, p. 201 

 (1JX)4). 



Depth of body less than 2 in the length, length of head 2^. 

 Diameter of eye. "-J^ in the length of head, lengtli of snout .'51, 

 depth of pricorbital U, interorbital width 2^. Maxillary 

 extending to below anterior margin of eye. Cheek with 4 

 series of scales. Scales 31 ^.^, 4 between last dorsal spine 

 and latcr.il line. Dorsal XIV 15 (XIII 14), the spines 

 subequal from the fifth, the last ne.irly 4 the lengtli of head. 

 Anal 111 14 (15). Pectoral extending beyond middle of 

 anal. Caudal peilunele ;-^ as long as deep. Oliv.iceous, with 

 4 more or less distinct dark cross-bars on the njjper part of 

 the body ; an ocellus on the upper jiart of the base of cauilal ; 

 vertical fins with alternate light and dark stripes. 



11. Amazon. 



1. (188 mm.) liyanuary. Prof. A. Agassiz. 



