xvi LIST <>[ \V(.KJDCUTS. 



FIi. PAUK 



_!">. Dingrtun showing the Interrertebral Bemaios of the Notocbord :x. 



26. Portion of the Vertebral Column of />;</</m/.*iw. (After Hal four and 



Parker.) 37 



27. 1'ortion of tlic Vertebral Column of a Y<iung Dogfish (Scylliinn I'miii-ulu). 



(After Cartier.) 33 



28. Portion of the Vertebral Column of iSicymnw .... . . 38 



29. Tail of I'm/iyi/i'mx . . :<! 



30. Tail of Lcpidostciut 39 



31. Longitudinal Section through tin- Yertebr.il Column of Various Urodeb-s. 



A, i;>i,{'i'iii f<ii" i-ifit.'i ; \'>, Amblyatoma tigrinum ; < ', Gfyrinophilus por- 



j>/iin-ilicus ; D, Salamandrina pi-rxpi<-il/<it<r. I" 



32. Vertebral Column of Discoglossiat pictus 11 



33. Tail of Arclwoptcryx 44 



34. Pelvis of Owl (Mrix bubo). (Ventral view.) I;" 



35. Third Cervical Vertebra of Woodpecker (1'ii-na riridis). (Viewed 



anteriorly.) 40 



36. Skeleton of the Trunk of a Falcon .49 



37. Costal Arch of Man .50 



38. Ventral Portion of the Pectoral Arch of liana cscidenta 52 



39. Pectoral Arch and Sternum of a Gecko (Hemidactylus verrucvsus) .... 52 



40. A, Sternum of Fox ; B, of Walrus ; and C, of Man 53 



41. Diagram showing the Primitive Metameric Condition of tbe Head .... 55 



42. First Cartilaginous Rudiments of the Skull 57 



43. Diagrammatic Transverse Sections, of tbe Head in Embryo (A) Sturgeons, 



Elasmobranchs, Anura, and Mammals ; (B) Urodeles and Snakes ; and 



(C) Certain Teleostcans, Lizards, Crocodiles, Chelonians, and Birds . . 58 



44. Second Stage in the Development of tbe Primordial Skull 58 



45. Diagrammatic Transverse Section of the Third Stage in the Development 



of tbe Primordial Skull 59 



46. Diagram allowing the Relations of the Embryonic Visceral Skeleton ... 60 



47. Semidiagrammatic Figure of an Elasmobrancb Skull, showing the Relation* 



of the Segmental Cranial Nerves 60 



48. Semidiagrammatic Figures of tin- Susjn-nsorial Apparatus in Various Verte- 



brates. (Mainly after (legenhaur.) A, Xotidauus ; 15, Other Klasmo- 

 branchs; C, Torpedo; D, Te.h-osteans ; K Amphibians, Reptiles, and 



Birds; !', Mammals 61 



49. Skull and Branchial Basket of l\/n>/nj/:uti ji/<ni' n 64 



50. Skull of Hcptanchus 64 



51. Cranial Skeleton of Raja oxyrhynclm ... 65 



52. Cranial Skeleton of Sturgeon (./<// Hft n after l.Ymoval of the Exoskeletal 



Parts 66 



53. Skull of l',,l,ipt,-rux b it-Jit r from t lie Dorsal Side 67 



54. Cranial Skeleton, IVtoral Arch, and Anterior Extremity of J'i-/<>/<'< ///.< . . 68 



55. Cranial Skeleton of Trout 69 



56. Skull of Young Axolotl. (Ventral view.) .... 71 



57. Skull of X,il.iniandra nlrn (Adult). ; Dorsal view.) 71 



