644 PROCEEDINGS OF THE ACADEMY OF [Oct., 



case there remained, after dehiscence, a spherical shell, across the 

 surface of which a long rent extended. Within was a considerable 

 c{uantity of granules, which, upon pressure, escaped from the cyst in 

 two or three large masses. Here we have the primitive condition, a 

 mere residuum, which no doubt takes part in dehiscence by swelling. 



Bibliography. 



BoLLMAN, Chas. H., 1887. Notes on North American Julidse. Ann. New York 



Acad. Sci., IV, 1887, pp. 2.5-44. 

 Crawley, Howard, 1903. List of the Polvcystid Gregarines of the United 



States. Proc. Acad. Nat. Sci. of Phila., January, 1903, pp. 41-58, Pis. 1-3. 

 Leger et DuBOSCQ, 1903. Recherches sur les Myriapodes de Corse et leurs 



Parasites. Arch. Zool. exper. et gen., 1903. [4], Vol. I, pp. 307-3.58. 

 Leidy, Joseph, 1853. On the Organization of the Genus Gregarina of Dufour. 



Trans. Amer. Phil. Society, Vol. 10, N. S., pp. 233-241, Pis. 11, 12. 

 Say, Thoma.s, 1821. Description of die Myriapodffi of the United States. Jour. 



Acad. Nat. Sci. of Phila., II, pp. 102-114. 

 Schneider, Aime, 1875. Contributions a I'histoire des Gregarines des In- 



vert^br^s de Paris et de Roscoff. Arch. Zool. exper. et gen., 4, pp. 493-604, 



Pis. 16-22. 



Explanation of Plate XXX. 



Fig. 1. — Acutispora macrocephala (p. 632). Sporont. 



Fig. 2. — Acutispora macrocephala (p. 632). Supposed epimerite. 



Fig. 3. — Acutispora macrocephala (p. 632). Spore. 



Figs. 4—6. — Acutispora macrocephala (p. 632). Cysts. 



Fig. 7. — Cnemidospora spiroboli (p. 638). Cyst about to dehisce. 



Fig. 8. — Cnemidospora spiroboli (p. 638). Empty cyst. 



Fig. 9. — Cnemidospora spiroboli (p. 638). Spore. 



Fig. 10. — Gigaductus parvus (p. 633). Association of two sporonts. 



Fig. 11. — Gigaductus parvus (p. 633). Cyst with everted sporoduct. 



Figs. 12, 13. — Gigaductus parvus (p. 633). Spores. 



Fig. 14. — Actinocephalus harpali (p. 637). Spore. 



Fig. 15. — Gregarina calverti (p. 638). Spore. 



Fig. 16. — Stenophora julipusilli (p. 634). Outline figure of young animal. 



Fig. 17. — Stenophora jidipusilli (p. 634). Adult. 



Fig. 18. — Trichorhynchus lithobii (p. 637). Sporont. 



Fig. 19. — Hoplorhynchus scolopendras (p. 636). Anterior end of relaxed animal. 



Fig. 20. — Small gregarine found in Scolopocryptops (p. 637). 



Fig. 21. — Small gregarine found in Scolopocryptops. Supposed to be the young 



of //. actinotus (p. 637). 

 Fig. 22. — Actinocephalus americanus (p. 636). Sporont. 



