184 EEPOKT OF COMMISSIONER OF FISH AND FISHERIES. 



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

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



S. FASCICULATA, Kiitz. 



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 

 !ong. 



On rocks between tide-marks. 



Newport, E. I. ; Europe. 



Table of comparative distribution of New England species. 





|<8 



fe'i 



St3 



m ~i 



A 





OT3 





£ 



txi^C 



























£s 



&■§ 



go 



go 



O <D 



>T 



SI 71 





ft . 



SO 



§R 







01 



pg 



K Pi 



P.® 

 ro P 



ft s< 



ofl . 



P4t3 





0^ 



p 



P 







O <*} 







£ h 





■S 5 " 





■^ a 









Ms 



9 "So 



go 



a* 



go 



Jo 



11 



£< to 



as 

 as 

 

 



oa.3 

 9K£ 

 9^ 



O 



O-p O) 



a on -*j 



O 





 



H 

 < 



.2 a 

 



4) 



.So 

 p-l p 



.a 

 ■p-a 



SI 



Cryptophycea? 



17 



»> 



32 



6 



24 



5 



24 



■i 



26 



r »" 



20 



3 















1 



l" 



2 









12 

 7 



88 



26 

 36' 



71 



19 



28* 



65 



20 

 27' 



77 



21 



30 



34" 



17 

 15 



























30 



15 



7 



33 



6 



3 



2 



2 



1 



3 





Chlorosporeae . . 



1 







<> 





«> 





1 





«> 





?, 





V 





1 























1 





1 





1 









1 































"(i 





4fl 





41 





36 





44 





17 





7 





"7 





1 





1 





?, 





4 





11 





7 





7 





11 





9 





9, 





7 





















1 





?, 





1 





?, 





9, 





1 



























3 



99 



9 



'09' 



6 



87 



5 



71 



9 



'48~ 



1 



ii" 



2 



34 



7 

















50 



7 





1 





12 









Total 



107 





230 





171 





183 





185 





104- 





31 





74 





10 





4 





17 





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 are counted, the total number of genera is 

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

 there is no complete list of the algaj 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 the 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 Floridece. 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 we 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 tlj^e number of genera and species found in New England 

 with the number of species and genera in Harvey's Phycologia Britannica and Le Jolis's Liste des 

 Algues Marines de Cherbourg. The number given by Harvey is 110 genera and 388 species ; that given 

 by Le Jolis is 137 genera and 316 species. The Phycologia was published in 1846-'51, and Le Jolis't 

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

 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 Scandinavicas 

 Marinae, published in 1850, 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. 



