522 SUBANTARCTlC ISLANDS OP NEW ZEALAND. [Marine Algae. 



under the name C. Smithii ; however, after much consideration, it seems to me 

 better to retain them under Agardh's specific name stichidiosum, and to call the 

 Enderby Island specimens C. stichidiosum, var. Smithii, and those from the Snares 

 C. stichidiosum, var. scopulorum. If, however, they should hereafter be considered 

 to constitute a distinct species I would recommend that the specific name Smithii 

 be adopted, in honour of Mr. J. Crosby Smith, who collected them, and who has 

 also collected the algae of eastern and southern Otago with great care and much 

 enthusiasm. 



Unfortunately, I have seen no authentic specimens of C. stichidiosum, and am 

 therefore not certain whether these plants can be retained under this specific name. 

 I can, however, find in them no characteristic to separate them distinctly from C. 

 stichidiosum. as described by Argardh. However, in both the specimens from the 

 Snares and those from Enderby Island the tetraspores are more or less confined to 

 the ultimate and penultimate segments of the pinnules, and do not form the complex 

 stichidiose-like organs described by Agardh (Anal. Algol., loc. cit.). It is possible, 

 if they were more fully developed, or growing in warmer seas, the fertile segments 

 would be more luxuriantly developed, when they would apparently agree in all 

 respects with those described by Agardh. As, however, there may be some doubt 

 of the identity of my plants with those described by Agardh, I give a fairly full 

 description of them. 



Ceramium stichidiosum, var. Smithii. 



A small densely tufted filiform plant 2-4 cm. high, nearly black (Klinksieck's 

 " Code des Couleurs," No. 65) in dried specimens, irregularly alternately subdis- 

 tichously pinnately branched in the lower portion of the plant. Main pinnae almost 

 squarrose, with simple more or less branched prolifications. Terminal and sub- 

 terminal pinnules more or less dichotomous, and somewhat apiculate ; ultimate 

 pinnules usually divaricating, at other times, when very young, sometimes slightly 

 incurved. Branching of pinnae takes place at somewhat irregular intervals, but 

 generally a ramulus is given off from about every fifth joint-cell, the forks being 

 strict at the axils. 



The whole plant is completely and nearly regularly corticated by a layer of 

 minutC; irregularly shaped, angular, rounded, or elongated cells, rather more densely 

 arranged over the nodes than over the internodes. A transverse section of the 

 stem shows a few somewhat larger internal cortical cells, quite distinct, however, 

 from the large internal cortical cells of a Microcladia. 



The tetraspores are large and numerously developed in irregular lines on both 

 sides of the terminal and subterminal pinnules. They are first immersed, but after- 

 wards protruded by about half their extent from the cortex, giving the pinnules a 

 swollen and somewhat stichidiose appearance. They are occasionally developed on 

 the face as well as on the edge of the pinnule. Cystocarps not seen. 



The species C. stichidiosum comes nearest a'piculatum, from which, however, 

 it may be distinguished by its abundant prolifications, by its much more slender 

 and less -flattened stems, by its long, narrow, and almost acuminate terminal seg- 

 ments. (In C. a'piculatum the ultimate pinnules are almost truncated. {Vide 

 Plate XXII, fig. 1 ; Plate XXIV, figs. 1, 4.) 



* Enderby Island ; J. C S. ! 



