y 



70 



rough weather. The thallus is brownish-olive, in form and consist- 

 ency somewhat resembling /v*. plicata, Carm., but of different micro- 

 scopical structure. It is the Schizosiphoii Warrenlae of the Phycolo- 

 gia Britannica, and has not before been reported in America. 



Palmdla rupestris, Lyngb.— In August, 1880, I found at Hunne- 

 well's Point, Maine, in a locality very much like that of \.\\c Rivularia 

 just mentioned, a small quantity of this species. It was in a soft 

 jelly-like mass, which contained several other minute algae. This 

 species also has not been previously found in this country. 



Porphyra leucosticta, Thuret, I found at Nahant in June, 1879. 

 It was very abundant at that time, the water being almost full of it ; 

 but, though I have often visited the locality since, at the same and 

 other seasons of the year, I have never seen it again. It is easily 

 distinguished from the omnipresent P. laciniata, Ag., by its softer 

 consistency and delicate rose-purple color; and the microscopic 

 structure is quite distinct, the anthefidia forming small spots among 

 the spore-ceils, and not a distinct marginal zone. It is a more south- 

 ern species than P. laciniata, and occurs throughout most of Europe. 

 It has not yet been recorded for our Atlantic coast, though Prof. 

 Farlow, in his Manual, considers its occurrence here probable. 



At the same time and place that I collected this species, I found 

 a single plant which I think may be identical with the 



Ectocqj^iis brachiaius, Harv., of the Nereis Boreali-Americana. 



The localities there given are South Boston and Lynn, Mass., and 



Prof. Farlow, m his work quoted, states that it is known in this 



country only by Harvey's description. My plant agrees quite well 



with an authentic specimen of E. Griffithsianus, Le Jolis {E, brachia- 



tus, Harv.), but, according to Bornet (Etudes Phycologiques, p. 16, 



note), the structure of this species agrees rather with the genus 



Phloeospora, Areschoug, it having, especially in the larger filaments, 



a cortical layer of quadrate cells, arranged in regular series. He 



proposes for it the name of Phloeospora biachiata, under which 



name it would be the only representative of the genus yet found in 

 this country. 



_ Monostrori.a BIyttii, Wittr., the largest of our species of the genus, 

 is reported in the Manual as growing luxuriantly at Eastport, Maine, 

 but reaching its southern limit at Nahant, occuring there in a reduced 

 form, not generally more than two or three inches long This 

 diminished size at Nahant is confirmed by my experience, as I have 

 tound few specimens there exceeding the dimensions just given : but, 

 rather curiously, at Revere Beach, just south of Nahant, it occurs in 

 October and November in abundance, the fronds sometimes more 

 than a foot high and proportionately broad, growing on shells and 

 pebbles near low-water mark. 



^rnvffnrrT J^'^/^W, Farlow, a species founded on a plant 

 fnnnH f^ T ■''''^l "°"'o°" "^'^ P''^^ ^^ ^^^ Government whLrf, I 

 Lrew nn M"""'?!"" ^r°'"\ ^^^'""' ^^^^ ^^g"«^- ^s at Wood's Holl, it 

 fble rh^t ^.' ^ '.! K ^''^^'^'■"'^'" '«^^-^^ter mark, and it seems pr^b- 

 in. ti^ Vo\ '^ ^'i^'^"^ ^" '™^'^^ ^t^^i°"^ ^^-^"g the coast, escap- 

 ab^undan^^n 1 ^,°"^^tors from its resemblance%o the Ulvas so 

 aounaant in such places. 



