The Microscope. 325 



slightly larger." See under 13 for the oval form of the corpuscles 

 in myxine. 



4. Gulliver, G. — On the Red Blood-Corpuscles of Vertebrates. 

 Proceedings Zoological Society, 1862, p. 99; 1870, p. 844; 1875, 

 p. 474. Gives an excellent account of the blood-corpuscles in all 

 groups of vertebrates, and says (1870, p. 844): " The red corpus- 

 cles of the lamprey are but rarely or exceptionally bi-concave discs, 

 and then only from irregular or unequal depressions on the surfaces, 

 scarcely ever from tv^^o symmetrical concavities. * * * Qn the 

 contrary, the red blood-corpuscles of the lamprey are regularly 

 either flat or slightly biconvex." This characterization does not 

 hold for the corpuscles of the American lampreys examined. The 

 red corpuscles are many of them distorted, however. 



5. Gilnther, A. C. L. G. — An Introduction to the Study of 

 Fishes. Edinburgh, 1880. In this and the following it is stated 

 that the corpuscles of lampreys are flat or bi-convex. " The blood- 

 corpuscles of fishes, with one exception, are of elliptical shape; this 

 exception is Petromyzon, which possesses circular, flat or slightly 

 biconvex blood-corpuscles." 



6. Gilnther, A. C. L. G. — Article, Ichthyology, Encyclopaedia 

 Britannica, 9th ed., vol. 12, p. 658. 



7. Huxley, T. H. — A Manual of the Comparative Anatomy of 

 Vertebrated Animals. New York, 1873. The red blood-corpuscles 

 in the marsipobranchii are circular and nucleated. All other fishes 

 have oval corpuscles, p. 90. See under 13 for myxine. 



8. Jones, Wharton. — The Blood- Coi'puscle Considered in its 

 Different Stages of Development. Philosophical Transactions, 1846. 

 Says the blood- corpuscles of lampreys are circular at all stages of 

 development, p. 66. 



9. K'olUker, A. — Handbuch der Gewebelehre des Menschen. 

 Fiinfte umgearbeitete Auflage. Leipzig, 1867. Also, his Manual 

 of Human Histology, translated and edited by Busk and Huxley, 

 1853-4. Says, p. 629, German, Vol. II, p. 336, English, that the 

 corpuscles of petromyzon and myxine are circular and biconcave. 

 See under 13 for myxine. 



10. K'olUker, A. — Grundriss der Entwickelunsgeschichte, 2nd 

 ed., 1884. Says corpuscles of the chick are, in the course of devel- 

 opment, first circular, p. 63. 



11. Leydig, i^. — Traite d' Histologie de 1' Homme et des 

 Animaux. Paris, 1866. Says, p. 507, that the red corpuscles of 

 myxine and petromyzon are circular and bi-concave. See under 13 

 for myxine. 



