Figures

1 The Voyage of the Beagle (1831-6), with arrival and departure dates page 13

2 Head of female (left) and male (right) Bearded catfish Pseudancistrus barbatus 14

3 Blennies, Family Blenniidae, and close relatives 19

4 Characins, Family Characidae 34

5 Clingfishes, Family Gobiesocidae 38

6 Creole perch Percichthys trucha, Family Percichthyidae 48

7 Cape Verde gregory Stegastes imbricatus, Family Pomacentridae 51

8 Diagram to illustrate the transformation of an annelid into a vertebrate 58

9 Dragonet Callionymus lyra, Family Callionymidae, illustrating sexual dimorphism 59

10 Eelpouts, Family Zoarcidae, with inserts showing teeth 63

11 The Fine flounder Paralichthys adspersus,Family Paralichthyidae 82

12 Fishes of the Family Galaxiidae, based on lithographs by B. Waterhouse Hawkins 93

13 Gobies, Family Gobiidae, with dorsal views as inserts 96

14 Groupers, Family Serranidae, based on lithographs by B. Waterhouse Hawkins 102

15 Sheephead grunt Orthopristis cantharinus, Family Haemulidae 104

16 Galapagos gurnard Prionotus miles,FamilyTriglidae 105

17 Argentine menhaden Brevoortia pectinata, Family Clupeidae 109

18 Jacks, Family Carangidae 116

19 One-sided livebearer Jenynsialineata, Subfamily Jenynsiinae 120

20 Livebearers, Family Poeciliidae 127

21 Singapore parrotfish Scarus prasiognathos, Family Scaridae 154

22 Pigfish Congiopodusperuvianus,Family Congiopodidae 158

23 Pipefishes, Family Syngnathidae 159

24 PoacherAgonopsischiloensis,FamilyAgonidae 163

25 Galapagos porgy Calamus taurinus, Family Sparidae 165

26 Narrow-headed puffer Sphoeroides angusticeps, Family Tetraodontidae 167

27 Schematic representation of mechanisms emphasized by three groups of evolutionists 168

28 RoundheadAcanthoclinusfuscus,FamilyPlesiopidae 175

29 Heads of Salmon Salmo salar,during the breeding season 178

30 Sandperches, Family Pinguipedidae 179

31 Bandfin scorpionfish Scorpaena histrio, Family Scorpaenidae 181

32 Silversides, Family Atherinidae, with inserts showing magnified scales 190

33 Thornfish Pseudaphritis undulatus, Family Bovichthyidae 202

34 The eponymous wrasse Pimelometopon darwini, Family Labridae 209

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