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X-T-Z. Riflessioni intorno alia memoria de' 

 Signori Professor! ZANTEDESCHI e MAYER ris- 

 guardante la scossa dellu raua. Poligrafo, XIV., 

 1833, pp. 61-64. 



Xantus, John. Catalogue of Birds collected in 



the vicinity of Fort Tejon, California, with a 



description of a new species of Syrnium. Philad. 



Acad. Nat. Sci. Proc. 1859, pp. 189-193. 



2. Descriptions of supposed new species of 



Birds from Cape St. Lucas, Lower California. 



Philad. Acad. Nat. Sci. Proc. 1859, pp. 297- 



299. 

 3. Descriptions of three new species of 



Starfishes from Cape St. Lucas. Philad. Acad. 



Nat. Sci. Proc. 1860, p. 568. 



Xantus, John. 4. Reise durch die Californische 

 Halbinsel, 1858. Petermann, Mittheil. 1861 

 pp. 133-143. 



Ximeues, Leonardo. Memoria intorno alia 

 maggior perfezione dell' argano. Verona, Mem. 

 Soc. Ital. I., 1782, pp. 613-647. 



2. Delle osservazioni solstiziali, fatte allo 



gnomone della cattedrale Fiorentina nell" anno 

 1782, e de' loro risultati paragonandole colle 

 simili osservazioui del 1756, 1764, e 1775. 

 Verona. Mem. Soc. Ital. II., 1784, pp. 256- 

 312. 



3. Memoria sulla vera densita de' pianetti, 



sulla riduzione de' loro semidiametri, e sull' 

 ipotesi de' loro nuclei. Verona, Mem. Soc. 

 Ital. III., 1786, pp. 278-296. 



Y. 



Y. Relazione dell' influenza, che esercita il con- 

 tatto del metalli eterogenei nelle loro proprieta 

 chimiche. Poligrafo, X., 1832, pp. 333-339. 



2. On the imaginary expressions for Sin ,r 



and Cos x. Mathematician, I., 1845, pp. 232- 

 235. 



Y, A. On the cause of deglutition. Charleston, 

 South. Journ. Med. I., 1846, pp. 290-293. 



Y, J. Observations on one of the means by 

 which the eye has been supposed to accommo- 

 date itself to the different distances of objects. 

 London, Med. Phys. Journ. II., 1799, pp. 331- 

 334. 



Yandell, L. P. On the distribution of the Cri- 

 noidea in the Western States. Amer. Assoc. 

 Proc. 1851, pp. 229-235. 



2. Description of a new genus of Cri- 



noidea. Silliman, Journ. XX., 1855, pp. 135-137. 



3. Notice of a new fossil genus (Eleuthero- 



crinus) of the family Blastoidea from the Devo- 

 nian strata, near Louisville, Ky. Philad. Acad. 

 Nat. Sci. Proc. VIII., 1856, pp. 73-75. 



Yarnall, M. Mean places for 1860.0 of Com- 

 parison-Stars, used in observations of Egeria, 

 Phocea, and Ariadne. Gould, Astron. Journ. 

 V., 1858, p. 94. 



Yarrell, William. Notice of the occurrence of 

 some rare British birds. Zool. Journ. II., 1826, 

 pp. 24-27 ; III., 1828, pp. 85-88. 



2. On the small horny appendage to the 

 upper mandible in very young chickens. Zool. 

 Journ. II., 1826, pp. 433-437 ; Froriep, No- 

 tizen, XV., 1826, col. 33-36. 



3. Notice of the occurrence of a species of 



Duck new to the British Fauna (Fuligula rufina, 

 Pall.). Zool. Journ. II., 1826, pp. 492-493. 



Yarrell, William. 4. Observations on the tra- 

 cheas of birds ; with descriptions and represen- 

 tations of several not hitherto figured. Linn. 

 Soc. Trans. XV., 1827, pp. 378-391. 



5. On the change in the plumage of some 

 hen-pheasants. Phil. Trans. 1827, pp. 268- 

 275 ; Ann. Sci. Nat. XIII., 1828, pp. 71-73. 



6. Some observations on the anatomy of 



the British birds of prey. Zool. Journ. III., 

 1828, pp. 181-189. 



7. Observations on the osteology of the 



Fennec. Zool. Journ. III., 1828, pp. 401- 

 403. 



8. On the osteology of the Chlamyphorus 



truncatus, Harlan. Zool. Journ. III., 1828, pp. 

 545-554 ; Froriep, Notizen, XXV., 1829, col. 

 145-149; Heusinger, Zeitschrift, III., 1833, pp. 

 124-130 ; Oken, Isis, XXIII.. 1830, col. 926- 

 928. 



9. On the supposed identity of Whitebait 



and Shad. Zool. Journ. IV., 1829, pp. 137- 

 144; Phil. Mag. VI., 1829, pp. 253-261. 



10. Observations on the Tapir of America. 



Zool. Journ. IV., 1829, pp. 210-213. 



11. On the use of the xiphoid bone and 



its muscles in the Cormorant (Pelecanus carbo, 

 Linn.). Zool. Journ. IV., 1829, pp. 234-237. 



12. Notes on the internal appearance of 



several animals examined after death, in the 

 collection of the Zoological Society. Zool. Jouru. 

 IV., 1829, pp. 314-322. 



13. On the structure of the beak and its 



muscles in the Crossbill (Loxia curvirostra). 

 Zool. Journ. IV., 1829, pp. 459-465. 



