90 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



aa has been suggested l»y Janczewski iu speaking of Sporoclmus, the frond of Stilophora 

 grows in a manner similar to that of Cuileria, which may be said to belong to the com- 

 pound trichothallic type. 



S. rhizodes, Ag. (Sporochnus rhizodes, Ag., Spec. — Spermatochnus 

 rhizodes, Kiitz., Spec. — Stilophora rhizodes, J. Agardh; Phyc. Brit., PI. 

 70 ; Ann. Sci. Nat., Ser. 3, Vol. XIV, Pi. 28.) (PL V, Fig. 4, PI. VI, Pig. 2.) 



Fronds attached by a disk, filiform, solid, becoming somewhat fistu. 

 lous, six inches to two feet long, branching subdicbotomously, destitute 

 of distinct axis, branches becoming attenuated, ultimate divisions erect; 

 sori very numerous, scattered irregularly over the frond; paraphyses 

 few-celled, clavate, somewhat incurved ; unilocular sporangia oval ; plu- 

 rilocular cylindrical. 



Not uncommon at various points in Vineyard Sound and Long Island 

 Sound on algae and eel -grass below low- water mark. 



The present species is sometimes found at the base of eel-grass and the larger alg3B, 

 but it is more commonly found in entangled masses a foot or two long washed ashore 

 jii sheltered bays after a heavy blow. The determination is not altogether satisfactory, 

 for our plants are generally coarser than the European forms of the species. Nor do 

 they correspond to S. Lyngbyei, which is coarser and more tubular, and has finer ulti- 

 mate branches and sori which are somewhat remote and arranged in transverse bands, 

 if we follow Harvey's description. Another species, hardly coming within our limits, 

 was found by Bailey in the Chesapeake and referred by Harvey, with considerable 

 doubt, to S. papulosa, Ag. 



STEIAEIA, Grev. 



(From stria, a ridge, referring to the arrangement of the sporangia in transverse lines.) 



Fronds attached by a disk, tubular, branched, cells of the interior 

 large, roundish, of the exterior smaller and subrectangular ; fruit con- 

 consisting of sporangia (or spores?), arranged in transverse lines. 



A genus whose position is very doubtful, because the structure of the fruit is not 

 sufficiently well known. By most writers it is placed in the Dictyotacece, but it is 

 not certain that the typical species, S. attenuata, possesses the peculiar antheridia 

 and tetraspores of that order. According to Areschoug, there are two forms of fruit, 

 one immersed, as in Punctaria, the other external, as in Asperococcus. 



S. attenuata, Grev., Phyc. Brit., PI. 25; Ner. Am. Bor., Vol. Ill, 

 Suppl., p. 123. 



Fronds a few inches to a foot long ; branches usually opposite, attenu- 

 ated to a fine point. 



Flushing, L. I., Bailey. 



The only American specimen known is that mentioned by Harvey in the Supplement 

 to the Nereis Am. Bor. as having been found at Flushing, L. I. 



Family LAMINARIE^E. 



Fronds large and coarse; species on our coast usually attached by 

 root-like processes, and with a stipe and expanded lamina, in one genus 



