184 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



present genus resemble the species of Calothrix rather than Lyngbya, hut the filaments 

 are not prolonged in a hair-like extremity as in the first-named genus. 



S. FASCICULATA, Kutz. 



Filaments a quarter to half an inch high, united in tooth-like masses 

 from a gelatinous base. .009-12 mm broad, sheaths thin, cells broader than 

 loug. 



On rocks between tide-marks. 



Newport, E. I. ; Europe. 



Table of comparative distribution of New England species. 



Besides the genera and species, enumerated above, there are 4 genera and 10 species described, 

 but not considered to be sufficiently well known. If these arc counted, the total number of genera is 

 111, and 240 species. The comparison with Mediterranean and Adriatic species is imperfect, because 

 there is no complete list of the algae of those seas, and our Pacific coast has not as yet been sufficiently 

 well explored to make it possible to give approximately the number of our species found there. In the 

 table tbe species marked peculiar to New England are those which extend along our whole coast, 

 those of more limited range being kept distinct. The table shows plainly the general fact that the 

 total number of species increases as one goes southward, and that the increase is mainly due to the'rela- 

 tive increase in number of the Floridea;. It also shows the close resemblance of our marine flora to that 

 of Northern Europe, and although the number of species common to Arctic waters is not large, as far as 

 the numbers themselves are concerned, yet, if wo consider the absolutely small total of species found 

 in Arctic regions, the number of species common to our coast is relatively very large. The general 

 •poverty of our flora may be seen in comparing the number of genera and species found in New England 

 with the number of species and genera in Harvey's Phycologia Britannica and Lo Jolis's Listo des 

 Algues Marines do Cherbourg. The number given by Harvey is 110 genera and 38S species ; that given 

 by Le Jolis is 137 genera and 316 species. The Phycologia was published in 1S46-'51, and Le Jolis's 

 Liste in 1863. In both works, more especially in the Phycologia, a number of species which wo have 

 in the present article united were kept distinct; but as additional species have been discovered since 

 the appearance of the two works above named, the total number of species is not probably much less, 

 or may even be greater, than the figures given by Harvey and Le Jolis. In Phycese Scandinavicaa 

 Marina 1 , published in 1S30, Areschoug describes 68 genera and 175 species. Since that date numerous 

 additions have been made to the Scandinavian marine flora, and the total number of species is proba- 

 bly not far from that of the species of our own coast. 



