164 CRYPTONEMIACE^. 



11. PHYLLOPHORA. Grev. 



Frond stipitate ; the stipes expanding upwards into a rigid-membranaceous, flat, 

 simple or cloven lamina, proliferous from the disc or margin, nerveless or faintly 

 nerved at base, formed of two strata of cells ; the medullary portion of oblong, 

 polygonal, empty cells ; the cortical of minute, coloured, vertically seriated cellules. 

 Conceptades sessile or pedicellate, globose or rugged, closed, containing within a 

 thick pericarp, a nucleus composed of several coalescing nucleoli or masses of minute 

 spores. Neraathecia external, wart-like, scattered, formed of vertical, moniliform 

 filaments, whose articulations are at maturity changed into strings of cruciate 

 tetraspores. 



The plants of this genus are generally found attached to rocks, near low water 

 mark, or at a greater depth on exposed coasts. Their root is an expanded disc, 

 from which numerous fronds rise in tufts. The young frond commences by push- 

 ing up a filiform stipe, which becomes compressed upwards and passes gradually 

 into the cuneate base of a simple, bifid or dichotomous, somewhat flabelliform 

 lamina. From the margin or disc of this primary frond others similar to it in 

 form but with less developed stipites spring proliferously, and thus the plant 

 continues to grow by successive epiphyllous branches. In some species a faint 

 evanescent midrib may be traced from the apex of the stipes into the lower part of 

 the frond. All are of a rigid substance, scarcely at all adhering to paper in 

 drying. Some are of a fine blood-red colour, others livid purplish. The nema- 

 iliecia or warts containing tetraspores afford beautiful microscopic objects. 



1. Phyllophora Brodicei, J. Ag. ; stipe cylindrical at base, compressed upwards, 

 branched, the branches expanding into oblong or wedge-shaped, simple or forked, 

 flat, membranaceous lamince, which are frequently proliferous from the summit ; 

 conceptades globose, sessile on the laminos ; nemathecia spherical, pedunculate, at 

 the tips of the laminaj. /. Ag. Sp. Alg. 2, p. 330. Harv. Phyc. Brit. t. XX. 

 Coccotylus Brodicei, Kiitz. Sp. Alg. p. 791. Fucus Brodicei, Turn. Hist. t. 72. E. 

 Bot. t. 1966. 



Hab. Dredged in 4—10 fathom water. Halifax, W. H. H. Maine, Mr. Hooper. 

 Boston Bay, Mrs. Asa Gray. (v. v.) 



Stem filiform, as thick as sparrow's quill, 3 — 4 inches long, compressed upwards, 

 irregularly branched, each branch ending in a cuneate, simple or forked, flat 

 lamina, very variable in breadth and in the amount of division, and very generally 

 proliferous either from the margin or the disc. A large suite of specimens now 

 before me exhibit many curious forms ; in some, the laminae are from two to four 

 lines wide, cuneate, obtusely bifid or once or twice forked, with a few apical cuneate 



