LIST OF ILLUSTRATIONS 1x 
ies ton Horaginestorndkurtle-meat andseges). 2 cc ieee s Ge mi ne oe 379 
ive Gs Deck=londeormdnurtle: << aes testes ses eke Cea eatin ecr ea ere ls Uo 391 
hie. 47. Khevtishimectleet, Para, Brazilige sa. .0i025 ia eee ees eo 402 
Pies: | Nailpiece-sbmbarcatlon | -uarges sae oe cites cake a's ee ie ma ae 409 
Plate 1. Posonmerthe:Chanchomayor aso skvde as Suse sw Frontispiece 
Plate II, Fig. 1. Bunocephalus haggini; fig. 2. bunocephalus bifidus; fig. 3. 
IBUROCEDRALUS TELL OPUNNIS: «1a Re ee Serer Utes gs nhs mirth ee 433 
Plate III, Fig. 1. Microglanis zonatus; fig. 2. Spine of same; figs. 3 and 4. 
Chasmocranus peruanus; fig. 5. Pimelodella peruana..............- 435 
Plate IV, Fig. 1. Brachyplatystoma juruense; fig. 2. Pimelodus jivaro; fig. 3. 
Pimelodus leptus; fig. 4. Duopalatinus peruanus..................-. 437 
Plate V, Fig. 1. Trachycorystes galeatus; fig. 2. Tympanopleura nigricollis, 
female; fig. 3. Tympanopleura nigricollis, male; fig. 4. Centromochlus 
GURUIVUS MS 4 Os la CMLCLOOUS \GLLUSSTITUS tere eee tetera career 439 
Plate VI, Fig. 1. Chaetostoma lineopunctata; fig. 2. Hemiancistrus arenarius; 
fig. 3. Tympanopleura nigricollis, male; fig. 4. Tympanopleura alta.. 441 
Riate Vil Hos: Ivand.2. Canthopomusiagassievin....4 a haa eel 443 
Plate VIII, Figs. 1 and 2. Harttia filamentissima; figs. 3 and 4. Harttia 
TVET OP Str Se ce Aone SRM oS ae SR hd ales Mr gt pee aS Cae arms Stee 445 
ele hep lexi ol NA OELtd: MACTODS™ «toda Ae cies: fant, ome oe eee ee ae 447 
Plate X, Figs. 1 and 2. Ancistrus occloi; fig. 3. Rhamdia riojae; fig. 4. Pimelo- 
dellosroceacs ne. 49). pectoral spinevOlSamMe {4 2.45- qs. se ee 449 
plate Glen osm A stOble pus MUNCOl © meer fasts ete Selcieus ts op pekaes eee 451 
Plate XII, Fig. 1. Corydoras zygatus; fig. 2. Corydoras stenocephalus; fig. 3. 
Corydoras episcopt, fig. 4. Corydoras leucomelas=....2..°.-. =>. sh aes: 453 
Plate XIII, Fig. 1. Otocinclus macrospilus; fig. 2. Pimelodella montana; figs. 
3-5. Pygidium atochae; figs. 6-7. Astroblepus praeliorum..........-. 455 
Plate XIV, Fig. 1. Curimata murieli; fig. 2. Curimata reticulata; fig. 3. Psectro- 
gaster cisandinus; fig. 4. Gasteropelecus coronatus; fig. 5. Carnegiella 
strigata; fig. 6. Bryconamericus osgoodi; fig. 7. Apareiodon pongoense.. 457 
Plate XV, Fig. 1. Apteronotus anas; fig. 2. Oedemognathus exodon; fig. 3. lips 
EMM CGUCE MR OLSATING ecg oe ax. oe0 Buss ce sane ad tah cool aa pee A aN a eg oa 459 
Plate XVI, Fig. 1. Sternarchogiton porcinum; figs. 2 and 5. Higenmannia 
conirostris; figs. 83 and 4. Rhabdolichops longicaudatus.............. 461 
Plate XVII, Fig. 1. Orestias incae; fig. 2. Orestias humboldti; figs. 3 and 4. 
Onestias  pentlonad wie no aOTESHAS CUDUETO she 2 a ere) oe eo 463 
Plate XVIII, Figs. 1 and 2. Orestias luteus; fig. 3. Orestias olivaceus; fig. 4. 
radiograph of Orestias agassizti; fig. 5. radiograph of Orestias pentland:. 465 
_ Plate XIX, Fig. 1. Orestias silustani; figs. 2-5. Orestias albus.............. 467 
Plate XX, Fig. 1. Orestias elegans; fig. 2. Orestias empyraeus; figs. 3-8. 
On eSUGSPAGUSSIZUU ERA Ae NG OES RI ee sap ee EIT oe Bsn SE 469 
Plate XXI, Fig. 1. Orestias miilleri; fig. 2. Orestias owenii; fig. 3. Orestias 
USSUGIE NCR ARM OTROS HOSTS 010 node 4 ha DOE oop ain eso or ese Bow oie 471 
Plate XXII, Figs. 1 and 2. Rivulus urophthalmus; fig. 8. Amplova allenic; figs. 
4-7. Aequidens hercules; fig. 8. Acaronia trimaculata................ 473 
