25 
No. 93. G. compressa . Ag. Succulent, brittle, somewhat compressed, alter¬ 
nately or sub-dichotomously branched, branches long and mostly simple, tapering to 
a fine point, tubercles ovate globose, sessile. 
Abundant in summer and August, below low water mark, thrown up on Staten Island, Jersey City, and 
other places ; dries black; does not adhere to paper; 6 to 20 inches long. 
No. 94 . G . confervoidcs. L. Cartilaginous, cylindrical filiform, irregularly and 
often slightly branched, branches long, sub simple, ramuli scattered, attenuated at 
each end ; tubercles roundish, sessile. 
Summer and autumn, abundant, Jersey City, and all the rocky shore south to the Narrows ; 6 inches to 
a foot long. 
Family XII. CRYPTONEMIACEiE. Har. 
Purplish or rose red, filiform, rarely expanded, gelatinous or cartilaginous ; con- 
ceptacles globose, masses of spores immersed or in swellings of the branches, with 
tetraspores variously dispersed. 
Genus, GELID1UM. Lamour. 
Linear compressed, sinuated, corneous, solid; fructification, tubercles immersed 
in the swollen ramuli, containing a spherical mass of oblong spores, also tetraspores 
immersed in the ramuli, bipartite or tripartite. 
G. Corneum . Huds. Between cartilaginous and horny, nearly flat, distich- 
ously branched, branches linear, attenuated at each end, pinnate and bi-pinnate, 
mostly opposite, spreading obtusely, and bearing within their apices elliptical tu¬ 
bercles. 
Of which we have the following — 
No. 100. Yariety Crinale. Huds. Setaceous, sub-cylindrical, somewhat di- 
chotomously branched, sometimes three-forked at top, and bearing a few elliptical 
oblong ramuli, attenuated at the axils. 
Summer and autumn, Hurlgate, Yellow Hook, and Staten Island ; the latter place very abundant in 
autumn ; three miles below Quarantine, at half-tide level, on rocks and stones ; half an inch to one and a half 
inches long. 
Genus, GIGARTINA. Lamour. 
Cartilaginous, filiform, compressed or flat, irregularly divided, purple or dark 
red, the central substance of rather lax, branching and anastomosing filaments ; the 
periphery of dichotomous filaments, distantly set in pellucid jelly, their apices moni- 
liform and strongly united ; fructification, external tubercles, also dense clusters of 
spores, held together by a net-work of threads. 
No. 104. G. pistillata. Gmel. Compressed, branches repeatedly forked, axils 
obtuse; naked or pinnated with short subulate ramuli. 
Autumn and winter, very abundant at Jersey City, Kavon Point, Red Hook, and elsewhere ; very irre- 
