193 



From its simplicity of structure and peculiar habitat I havo 

 designated this minute plant 



3. Verrucaria *perpusilla. 



Detected in October, 1855, at Saugus, in a small stream 

 flowing from a mill pond, 



4. Hildenbrandtia sanguinea ; Kuizing Species Algarmn 



p 694. Phyc. Gen. 78 figure V. Payer Botanique 



Crypiogamiqiie figure on p. 49. 



I found this singular marine production in similar situations 

 with the plant first mentioned in this article. Like that lichen, 

 it seems to stain the rocks, but, in reality invests them with a 

 thin blood-red film. Sometimes these films, which are the 

 fronds, assume a variety of colors, but are mostly purple. Upon 

 this surface may be seen numerous little depressions, like the 

 prickings of a pin, and in these punctures numerous asci filled 

 with spores and accompanied by slender paraphyses can be de- 

 tected. The rocks on which this brilliant stain-like plant vege- 

 tates, are near low- water mark exposed to the sea's force, and 

 which are covered by shaggy masses of several species of fuci. 

 From the Nereis Boreali-Americana, by William H. Harvey, 

 published in the Smithsonian Contributions, Volume IV, 

 Article 5, where this genus is only incidentally mentioned, the 

 detecting of this fine plant may be considered as forming an 

 addition to our North American Flora. 



Found by me. at Cat Island, Harbor of Salem, Massachu- 

 setts, August 6th, 1855, on rocks near lower water mark. 



5. Dothidea (Asteroma) pomigena. Schu'einiiz' Synopsis 

 of North Ainei'ican fungi ^ in the American Philosophical 

 Transactions, Vol. IV., Article 8, p 232. 



This minute fungus appears like small black spots upon the 

 skin of certain varieties of the apple ; and according to Schw- 

 einitz it is pajrasitical on the " Newton Pippins." My friendj 

 Henry F. King, in November, 1855, showed me this particu- 

 lar instance of its presence, on the skin of a smooth, yellow 

 apple of a variety unknown to him, and which was raised in 

 Andover, Massachusetts. The spots, scarcely a quarter of an 



ESSEX INST. PROCEED. 25. 



