Xll 



LIST OF ILL USTRA TLONS 



Japanese Saw-Fish, 

 Halavi Ray, 

 Thornback Skates, 

 Jaws of Thornback, 



PAGE 



537 

 539 

 540 

 541 



PAi; E 



Common Skate and Marbled Electric Ray, 542 



Teeth of Lobe-Finned Shark, . . 546 



Restoration of Fold-Finned Shark, . 547 



Restoration of Spine-Finned Shark, . 547 



THE LOWEST VERTEBRATES AND THEIR ALLIES 



A Cartilaginous Sea-Sqnirt (Phcdlusia), 

 Pear-Shaped Ascidian (Hypohythius), 

 A Creeping Ascidian (Glavelina), . 

 An Incrusting Ascidian (Botrylloides), 

 A Compound Ascidian (Amarucium), 

 An Individual of a Chain-Salpa, . 

 Botryllus, , 

 Young Balanoglossus, 

 A Pyrosoma Colony, 



PAGE 



565 

 566 

 567 

 568 

 568 

 570 

 572 

 573 

 576 



ERRATA 



PAGE 



47. 



169. 

 178. 

 180. 

 186. 

 245. 

 266. 

 273. 

 274. 

 3i 12. 

 333. 



362, 



527. 

 532. 

 534. 



Lint- 18 from top, after "yet" add "except in the leathery turtle." 



Line 4 from top, for "rib-process" read "rib-like process." 



Lines 2 and 3 from top; for "the majority of the vertebra 1 of the tail have the articular cup 



behind and the ball iii front " read " the nuchal bones give off rib-like processes underlying 



the marginals/' 

 Line 6 from bottom, for " 3j " read " 8|." 

 Line 10 from bottom, for "African" read "Oriental." 

 Lines 21 and 22 from bottom, transpose "upper" and "lower." 

 Line 12 from bottom, for "New Island" read "New Ireland." 

 Line 7 from top, for " heavy " redd " horny." 

 Line 4 from top, for " Australia " read " Papua." 

 Line 12 from bottom, after "and" add "almost." 

 Line 8 from top, for "vertical" read "horizontal." 



Line 4 from top, for "Hypnobius" read "Hynobius" ; line 22, omit "only." 

 In table, delete "(6) Suborder Isospondyli— Leptolepis " ; and on p. 334, line 7 from top, for 



" eight " read " seven." 

 397. The species of Thyrsites and Sphyrcena are both termed "barracudas" ; the latter may be 



distinguished as " barracuda-pikes." The account of the fishing of the latter refers to the 



former. 

 Line 29 from top, for "Iceland" read "Ireland." 



Line 25 from bottom, instead of "four . . . five or six " read " five . . . six or seven." 

 Line 2 from top, for " developed " read " depressed." 



