. Quarterly journal of microscopical science. t ^1 inch.,, 7.—Newly hatched, rapidly moving pseudo-filariaj of G. Sipunculi, from cysts in the intestinal wall of Sipu7iculus midus.„ 8.—Further advanced, with commencing nucleus.„ 9.—Commencing transverse division,,, 10, IL—The posterior actively moving tail is marked off from the immobile, more fully developed head, forming the pseudo- cercaria,„ 12, 13.—The separated anterior and posterior , 14. Further development of 12 to a true Gregarina form. This specimen presents a double nucleus.„ 15. Multiplication of the smallest Gregarinae
. Quarterly journal of microscopical science. t ^1 inch.,, 7.—Newly hatched, rapidly moving pseudo-filariaj of G. Sipunculi, from cysts in the intestinal wall of Sipu7iculus midus.„ 8.—Further advanced, with commencing nucleus.„ 9.—Commencing transverse division,,, 10, IL—The posterior actively moving tail is marked off from the immobile, more fully developed head, forming the pseudo- cercaria,„ 12, 13.—The separated anterior and posterior , 14. Further development of 12 to a true Gregarina form. This specimen presents a double nucleus.„ 15. Multiplication of the smallest Gregarinae by longitudinal fission.„ 16, 17. Stages in that process, ,, 18. A young i)io«ory4^zs 62);m«c?^/?,-jT^Qth of an inch long.„ 19. Pseudo-uaviculse of Gregarina {Monccystis) Scenuridis which were observed in prodigious quantities in cysts and liberated in the perivisceral cavity of a specimen of Tubifex rivulorum. They possess a motionless filament similar to those of some psorosperms. Jicm-^ j$m,,r^olM. MS ^11 ?it J 5. 1!« 16 -V M^Tarlane &ETskine,Litli^ Elm 1 rD i;mt VI t m
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1872
