72 THE ANIMAL PARASITES OF MAN 



(5) EIMER, TH. Ueb. d. ei- u. kugelform. Psorsp. d. Wirbelth. Wiirzb., 1870. 



(6) LEUCKART, R. Die Paras, d. Menschen, &c., 1879, ii., 2nd edition, p. 248. 



(7) KAUFFMANN, W. Anal, ad tubercul. et entoz. cognitionem. Diss. in Berol., 1847. 



(8) STIEDA, S. Ueber d. Psorosp. d. Kaninchenleber (Virchow's Arch. f. path. An., 



1865, xxxii., p. 132). 



(9) WALDENBURG, L. De struc. et origirie cystidum verminos. Diss in Berol, 1660. 



(Virchow's Arch. f. path. An., 1862, xxiv., p. 149). 

 Zur Entw. d. Psorosp. (ibid., 1867, xl., p. 435). 

 (10) KLOSS, H. Ueb. d. Paras, d. Niere von Helix (Abhandl. d. Senckenb. natnrf. Ges. 



Frankf. a. M., 1855, i., p. 189). 

 (n) REINCKE. Nonnulla quaed. de psorosp. cuniculi. Diss. in Kiliae, 1866. 



(12) RIVOLTA, G. Psorospermi i psorospermosi negli anim. dom. (Med. veter., 1869, 3, 



. iv.). 



(13) PFEIFFER, L. Beitr. z. Kenntn. d. pathol. Greg. ; II. Ueber Gregarinose, 



ansteckendes Epitheliom u. Flag.-Diphth. d. Vogel (Zeitschr. f. Hyg. u. Inf., 

 1889, v., p. 363). 

 Die Protozoen als Krankheitserr. ist edition, Jena, 1890 ; 2nd edition, 1892. 



(14) PFEIFFER, R. Beitr. z. Protozoenforsch. I. Die Coccidienkrankh. d. Kaninchen 



Berlin, 1892. 



(15) BALBIANI, G. Le^. sur les Sporoz. Paris, 1884, p. 104. 



(16) SCHNEIDER, A. Le cycle evolut. d. Cocc. et M. L. Pfeiffer (Tabl. zool. ii., p. 



105). 



(17) LABBE, A. Rech. zool., cytol. et biol. sur les Cocc. (Arch. Zool. exp., 1896, 3, iv., p. 



(18) SCHUBERG, A. Die Coccid. aus Darm der Maus (Verh. nat.-med. Ver. Heidelberg. 



N. F., 1895, v., p. 369). 



(19) LKGER, L. Le cycl. evol. d. Cocc. chez. les arthrop (C. R. soc. biol., Paris, 1897, 



10, iv., p. 382). 

 Cocc. nouv. du tub. dig. d. Myriap. (C. R. Ac. sc., Paris, 1897, cxxiv., p. 901). 



(20) SCHAUDINN, F., and M. SIEDLECKI. Beitr. z. Kenntn. d. Cocc. (Verh. d. D. 



zool. Ges., 1897, vn -' P- J 9 2 )- 



SCHAUDINN, F. Unters. lib. d. Generationswechsel bei Cocc. (Zool. Jahrb. An., 

 1900, part 13, p. 197). 



(21) SIMOND, P. L. L'evol. d. sporoz. du genre Coccidium (Ann. Inst. Pasteur, 1897, 



xi., p. 545). 



Occurrence of the Coccidiida. -- The Coccidiida in their mature 

 condition usually live within the epithelial cells of various organs, and 

 by predilection inhabit those of the intestine and of its dependent 

 organs ; they also occur frequently in the excretory organs of 

 the mammalia, birds, amphibia, molluscs, arthropoda, and may 

 also be found in the scrotum and vas deferens, but the state- 

 ment that they live in hen's eggs, as well as in the oviducts of 

 fowls, has not been confirmed. 1 Some species inhabit the nucleus, 

 others live in the connective tissue, but their presence in the latter 

 situation is probably only secondary, that is, they have only 

 reached it from the epithelium of the affected organs. 



1 Notwithstanding the progress made during the last decades, the ova of helmirithes 

 and more particularly of trematodes, have been mistaken for coccidia. Thus Posch- 

 inger (Zool. Am., 1886, ix., p. 471) and Gebhard (Virchow's Arch., 1897, No. 147, 

 p. 536) mistook the ova of Distomum turgidum, Brds., for coccidia. Podwyssotzki 

 (Centralbl. /. allg. Path., 1890, i., p. 135) made a similar error with the ova (and vitelline 

 sacs) of a species of Prosthogonimus (Dist. ovatum of the authors); von Willach (Arch. 

 f. wiss u. prakt., Thierheilk, 1892, xviii., p. 242) took the ova of a nematode for coccidia. 

 These errors are merely alluded to as a warning. A closer examination of the objects 

 and a knowledge of such mistakes will ensure their avoidance. 



