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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.1898 Excerpt: ... Volume XIV. September, i8g8. Number 3. JOURNAL OF MORPHOLOGY. BUDDING IN PEROPHORA.1 / J /.: A GEORGE LEFEVRE. Although the phenomenon of budding in the group of Tunicata has received the attention of numerous observers for a long time, during the last twelve or fifteen years investigation has been largely confined to the process in the pelagic forms, Salpa, Doliolum, and Pyrosoma. In the ascidians, however, what we have known of the budding, until recently, has been based almost entirely on the observations of earlier workers. Among the latter Kowalewsky (12 and 13), who studied the bud development in Perophora, Didemnum, and Amaroucium, Delia Valle (4), in Didemnum, Distaplia, and Botryllus, and finally Seeliger (29) and Van Beneden and Julin (33), in Clavelina, are especially prominent. Within the last three or four years, however, our knowledge has been greatly enriched by the researches of Pizon (22) and Hjort (8) on Botryllus, of Salensky (27) on Distaplia, and by those of Caullery (1). Although the observations of these investigators agree in many important points, still, in others, notably the origin of the nervous system, great difference of opinion exists. 1 This paper was accepted as a dissertation for the degree of Doctor of Philosophy by the Board of University Studies of the Johns Hopkins University, May, 1896. While the Marine Laboratory of the Johns Hopkins University was stationed at Beaufort, N. C, during the summer of 1894,1 collected material for the purpose of studying the development of the buds of Perophora viridis Verrill, which was found there in great abundance. This material I supplemented the following summer at Woods Holl, Mass., while working in the laboratory of the United States Fish Commission. My main object in undertaking...
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