i \i;i'\( i r. 



88. fasciculatus (The fasciculate TSctocarpus) ; tufts oliyac 

 dense; main filaments not much divided \ the branches 

 taut, set throughout with alternate or secund fascid 

 subulate ramuli ; the ramuli generally Becund in each mul- 

 tifid fascicle \ Bilicules Bessile, secund, close together, 01 

 acuminate or subulate, Uarv. Man, ed. 1. p. l<». \ 

 PL \l\. Fig. B 

 Ha}). Between tide-marks, on the Larger Alga?; 1 1 1 < > — t commonly 

 on Laminaria digitata. 

 An exceedingly common species, easily recognized by 

 the dense ramuli, which appear to the naked 

 tufted, l»nt which are really only closely placed, and - - 

 ciunl on the penultimate branchlets. The favourite habi- 

 tat of JS. fasciculatus is on the expanded fronds of L 

 digitata, where it often fringes the segments in continuous 

 tuns, hut it is not confined to that plant, being commonly 

 found also on L. bulbosa and on Ilimanthalia lorea, and 

 others of the larger fucoid Alg«. When young and well- 

 grown it is a very handsome species, hut soon beo 

 coarse and ropy, and towards the close of the sea* 

 very much infested with Diatomaceous parasites. In North 

 America this species appears to be the most abundant of 

 the genus. 



SI. Hincksise (Miss Hincks** Sctocarpus) ; tufted, dark-olive ; 

 filaments irregularly and distantly branched ; branches i!< \- 

 uous, famished with secund ramuli pectinated on the upper 

 side; utricles conical, Bessile, Lining the inner face of the 

 nit imate ramuli, Harv. Man, ed. 1 . p. l>>. ( A clas, PI. XIX. 

 Fig. 83.) 



Hob. Parasitical on Laminaria bulbosa. Annual, dune. 

 My first knowledge of this species v>as from a solitary 

 en gathered in 1840 l>y Miss Hincks, daughter of 



the venerable and respected Dr. Hincks, of Belfast. 



Though I had then seen hut one specimen, yet so striking 



were its characters that I did not hesitate to describe it 



forthwith as a now Bpecies. Mv. Kails finds that in dune. 



at Mount's Bay, Cornwall, the stems of L. bulbosa are 

 almost exclusively infested with it. It is perhaps not un- 

 common, hnt without a careful inspection may he 

 looked; a pocket lens is, however, sufficient to detect it. 

 the comb-like, often scorpioid ramuli affording an ol 

 character. When growing, as it sometimes does, mixed 

 with E. siliculosus, the brighter and more . 

 softer threads of the latter may he readily discriminated. 



