LIST OF ILLUSTRATIONS 



XXV11 



FIGURE PAGE 



541. Conical cells, isolated . ..... 633 



542. From a meridional section of the choroid coat . 637 



543. The ciliary body and the adjacent structures; meridional section . 639 



544. The developing eye in meridional section; diagrammatic . 645 



545. Schematic reconstruction of the developing eye . . 646 



546. The retina of a child's eye; meridional section . . . 647 



547. Pigmented epithelium of the retina, viewed in transection . . 647 



548. Isolated rod and cone visual cells of the pig . 648 

 549. Diagram of the rod and cone visual cells, and their respective bipolar 



neurons ...... ... 649 



550. A rod and cone visual cell from the fundus of the human retina, 



outside the macula lutea . .... 650 



551. Two cones from the human retina .... . 650 



552. From the human retina . . . ... 651 



553. Diagrams of the human retina, showing the relationships to each 



other of the retinal neurons, and their disposition in the different 



layers . ........ 652 



554. From a meridional section of a child's eye, showing the layers of 



the retina at a point midway between the macula lutea and the 



ora serrata ... . . ... 653 



555. Horizontal cell from the retina of a calf . . . 655 



556. Two amacrine cells from a transection of the retina of a calf . 656 



557. A nerve cell of the large ganglion cell layer; from the retina of a cat . 657 



558. A fiber cell of Miiller, or sustentacular cell, from the dog's retina . 658 



559. Transection through the fovea centralis retina? . . . 660 

 560. Developing rod and cone visual cells, from the retina of a 345 mm. 



(6 mos.) human fetus . .... .661 



561. Two early stages in the development of the rod and cone visual cells 



in the chick ......... 662 



562. Diagram illustrating Balfour's theory to account for the inversion 



of the visual cells of the vertebrate retina . 663 



563. Entrance of the optic nerve . . . 664 



564. Lens fibers .......... 667 



565. The nuclear zone at the margin of the crystalline lens of a child's 



eye, showing the transition of the lens epithelium to the lens fibers 



and the attachment of the suspensory ligament . . . 668 



566. Schematic representation of the intrinsic blood vessels of the eye . 671 



567. Vertical section through the upper eyelid ..... 675 



568. Arterial supply of the eyelid . . 678 



569. Section through a lobule of the lacrimal gland of man . 680 

 570. Portions of two adjacent lobules of the lacrimal gland of the rabbit, 



showing two stages in secretory activity of the tubules . 681 



571. Transection of the lobule of the external ear of an infant 683 



