Download PDF by J.H.S. Blaxter, Frederick S. Russell, Maurice Yonge (Eds.): Advanced in Marine Biology, Vol. 17

By J.H.S. Blaxter, Frederick S. Russell, Maurice Yonge (Eds.)

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Extra resources for Advanced in Marine Biology, Vol. 17

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The discussion herein involves their interpretation and use in modern Halimeda taxonomy. 5 times the diameter of the filament) and then separate; openings, pits or pores develop in the walls between adjacent filaments ; filaments fuse for a short distance in pairs and then separate; filaments fuse completely in twos or threes and do not separate therafter (although the filaments continue their branching pattern). With Yamada’s (1941) new species a fourth category was needed: filaments remain separate throughout the node.

12) in what seems t o T h e Corpllina incnffita, from the MfefiIndieo. 21. One of the joints of it8 natural fie. 12. The fame magnified a little, to h e w i u pores in its calcareous furface. 23. Part of the inlde t u b a of the joint, of their natural h e . 14 The fame magnified, to h e w the opcningr of the cells on the furface. conncQed together. lo. A perpendicular fettion of half of one of thcfe joints. 96. T h e fame magnified. to h e w the fi ure of the vefils leadin to the fucfen in the alcareous furkce.

These illustrations with analysis, by Ellis ( 1 7 6 7 ) , provide the type description of the species incrassata. Ellis’ work also represents the earliest known microscopical study of the genus. The habit (No. 20) illustrates the caulescent effect obtained when bmal segments remain unbranched. I n older plants a number of basal segments may become consolidated into a relatively massive struct,ure. ) ECOLOGY AND TAXONOMY OF Halirneda 21 be the earliest comparatively detailed examination of internal structure in Halimeda.

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