tlu-ir r It is probable indeed that K did not himself 



terminations as merely dichotomy or ordinary 

 in liis diagnosis n> any liaptera. See our figs. 127. 1 ^s ^). 



ir Crn 1 c. preserved in the British Museum 

 and Kew H but little plants of A'. tomentosa with short thick stalk. The 



stunt ha • I) those of the type. The identiry of these two species 



• 1 lr w and H' k idle. 

 years ago in the Danish West Indies collected .1 few specimens 

 much thi ond, reniform-flabellate, and translucently zonate. To this form we have 



fig. 129 



1 tenaculosa n. sp. 



nglutinata Dickie in Journal Linn. Soc. Bot.) XIV. 1S74. p. 376. 



Vtlantic. Brazil, < > 1 1" Barra Grande near Pernambuco, 30 fathoms, Sep. 10. 1S73, *Ckallenger" 

 ïedition ! 



int thin, light -reen to full green, stipitate, solitary or a few together on a horizontal 

 ime, stipes 1 — 1.5 cm. long, 0.15 — 0.2 cm. thick, flattening out above and expanding 

 suddenly into the frond. 



Frond up to 6.5 cm. in length and breadth, rotundato-flabellate or subinfundibuliformly 

 and excentrically peltate, thin, fissile, usually distinctly zoned, margin entire, fringed, lobed 

 or lacerate. 



Frond-filaments 30 — 70^ usually about 40 p in diam., being collapsed or flat (in dried 

 lateral branchlets mostly very short, usually about 50 p but sometimes reaching 

 very abundant on main filaments, and apparently truly lateral in most cases. 

 Filaments of the stipes similar to those of the frond but emitting a few rhizoids. 

 1 30— ' 3 



This species is founded on specimens collected at a depth of 30 fathoms off the coast 



of Brazil, and preserved in the British Museum and Kew llerbaria. As may be seen by the 



;, they include plants which are rotundate-flabellate (fig. 130), as well as others which 



excentrically peltate (fig. 131) in which respect they resemble the habit of Rhipiliopsis 



ita. C ladocephalus excentricus and Udotea cyathiformis. 



Their structure differs from that of R. tomentosa in the slightly more slender character 

 of the frond-filaments and especially in the great abundance and the shortness of the lateral 

 branchlets or tenacula with which the frond-filaments are beset (figs. [32, [33). 



In hal.it, R. tenaculosa differs from A'. tomentosa in often being excentrically peltate, 

 pi , and a thinner, often fissile and, so to sprak, threadbare frond. 

 the following species R. tenaculosa differs in being larger, firmer in texture, more 

 and in being composed of thicker filaments with much more numerous and 

 mui branchl* 



