This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...characters separate P. torquis from the endophyte figured, but t named, by Waagen and Wentzel, f in the corallites of Geinitziella columnaris, Schl. Duncan's illustrations of Pcdceachlya perforans convey, in a general way, the appearance of the tubes in P. torquis, allowing for the much more irregular course of them in the latter, and it may legitimately be concluded that, although allied, they are distinct. As regards the chains of monilliform cells, the probability seems to be that they, and the tubes of P. lorquis, represent separate organisms, twithstanding Duncan's remark that whilst recognising two or three forms of parasitic Algae within these sclerenchyuiatous structures of recent and ancient date, it does t follow that they are to be made into different species. They may all be parts of the same mycelium-like growth of the parasite, and may depend upon the nature of the nidus in which growth has taken place. In this opinion I am supported by that of my colleague, Mr. Thomas Whitelegge, who has had great experience in the microscopic examination of Cryptogamic life. Tubes similar to both those w under description have been investigated by many Biologists, with the result of much difference of opinion as to their nature. Prof. John Quekett appears to have been one of the first to investigate similar chains of moniliform cells, and gave an excellent illustrationf of them permeating the tissues of a coral, at the same time terming them confervoid growths. He remarked that confervoid growths also are very frequently met with in the skeletons of corals, as all these bodies possess animal matter, which, decomposing after death, become a nidus for the development of confervae. In addition to a coral, he...