Rare and remarkable animals of Scotland, represented from living subjects: with practical observations on their nature . pervades this species, of which diiFerent specimensexhibit varied aspects, in the number and dimensions of the parts, as wellas in the number and distribution of the vesicles. Sometimes one or twoof the latter appear at a remote interval: sometimes several are closelyhuddled together, on or about the stem. The facility of obtaining the product, however, renders it a conve-nient subject for observation. Plate XXVI. Fig. 14. Sertularia pumila. 15. Specimen with ceUs and hydrse
Rare and remarkable animals of Scotland, represented from living subjects: with practical observations on their nature . pervades this species, of which diiFerent specimensexhibit varied aspects, in the number and dimensions of the parts, as wellas in the number and distribution of the vesicles. Sometimes one or twoof the latter appear at a remote interval: sometimes several are closelyhuddled together, on or about the stem. The facility of obtaining the product, however, renders it a conve-nient subject for observation. Plate XXVI. Fig. 14. Sertularia pumila. 15. Specimen with ceUs and hydrse, enlarged. 16. Articulation consisting of two cells. 17. Ovoidal vesicle discharging its abortive contents. 18. Empty ovoidal vesicle on an articulation. 19. Specimen with globular yellow vesicles, 20. The same, enlarged. 21. Planulse from ovoidal vesicles. All the figures except 14. and 19. are enlarged. § 6. Sertularia Halecina and Cognates—Herring Bone XXVII. XXVIII. XXIX. XXX.—It appears to be very obscurewhat is the true Sertularia halecina specified in the Linnsean Systema ri. IL. xm/.. (^^imi^a 1, ^j^.t^^^^^ui SERTULARIA. 163 Naturee, or in other systems ; or whether authors have in fact identifie dany one of such peculiar formation as to be exclusively thus denominated. The figure given by Ellis, Plate X. a, N. 15, as the Sertularia hale-cina, is certainly from an indiiferent drawing of what is named ThoaBeanii in Dr Johnstons useful work, Plate VI. Thus the description and concomitant figure by Ellis do not distin-guish any species recognized as the Sertularia halecina exclusively. But there are several reasons for assuming that this species is seenunder considerable modification, which has induced naturalists to esta-blish as others, what may be perhaps only varieties. Some of these arecertainly cognates—children of the same family. Whatever may be the real critical distinctions among them, manyinteresting facts are disclosed by perfect specim
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectzoology, bookyear1847
