146 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



from Chondrns, to Avhicli several of the si^ecies were formerly referred, by tlie structure 

 of tlie froud and the arrangement of the tetraspores ; from Phjllojjhora by the absence 

 of a stipe and the immersed cystocarj)s. 



G. KoRVEGiGUS, J. Ag. (82)hcerococciis Norvegiciis, Ag. — Chondrus 

 JSforvcgiciiSj Lyiigb. ; Phyc. Brit., PI. 187. — Oncotykis Norvegiciis^ Klitz.) 



Frouds deei) red, two to four inches liigli, linear, dichotomous, flat, 

 fastigiate, axils rounded, patent, apices obtuse: cystocarps immersed 

 in the ujDper segments projecting on both sides of the frond j nema- 

 thecia sessile, hemispherical, on both sides of the frond. 



In deep pools on rocks. 



Penobscot Bay, Mr. Hooper ; Peak's Island, Maine, W. G. F. ; Nahant, 

 W. G. F. ; Beverly, Mass., Miss Alexander. Europe. 



Our plant, which is apparently rather rare, is the same as that of Europe, although 

 narrower forms are sometimes seen which x)erhaps might be referred to the G. Torreiji 

 of Agardh. G. Griffithsiw is to be expected with us, as it is common in Europe. The 

 j)resent species is found only in the autumn and winter, either in deep cold i^ools or 

 below low-water mark. Its resemblance to the simpler forms of Chondrus crisjms is so 

 great that it is perhaps mistaken for that species by amateur collectors. Its color, 

 however, is red rather than purple, and the whole plant is thinner and more delicate 

 than C. crispus, which, moreover, has quite a different microscopic structure. 



G. TORREYI, Ag. 



Frond compressed, flattish, dichotomous, fastigiate, segments linear, 

 very narrow, the axils rounded. 

 ]^ew York, Prof. Agardh. 



A species known only by the above description of Agardh. Bailey, in Am. Jour. 

 Sci., Vol. VI, 1848, p. 39, makes the singular statement, in speaking of Dasya elegans, 

 Ag., that he has examined a fragment of the original specimen of SpJicerococcus Torreyi 

 in the Torrey Herbarium, *' which," he says, ''unless I am greatly mistaken, was 

 founded on a battered specimen of this jdant." 



AHNFELDTIA, Fries. 



(Named in honor of Nils Otto Ahnfeldl, of Lund. ) 



Fronds cartilagineo-corneous, subterete, dichotomous or irregularly 

 branched, composed of densely packed elongated cells within and a 

 horizontal layer of closely packed short filaments formed of small colored 

 cells; cystocarps immersed in the fronds j tetraspores in nemathecia 

 which surrounded the branches (?). 



A small genus, comprising stiff, wiry, or cartilaginous algje, whose fructification is 

 not well known. As it is, the genus is distinguished from Gymnogongrus rather by the 

 rigidity and terete character of the fronds than by any more definite character, since 

 the fact that the tetraspores in the present genus are in the nemathecia which surround 

 the branches, even if fully proved, which is not the case, would hardly constitute suf- 

 ficient ground for the separation of the genera. In the only common species of tho 

 North Atlantic cystocarps have never been seen and the nemathecia have not been 

 satisfactorily examined. In Ahnfeldtia gigartinoides of the west coast the cystocarps 

 form nodose swellings in the upper part of the branches, and there are numerous car- 



