114 
NOSTOCHINEiE. 
Sutherland further mentions having tried it as an article of food, and found it prefer- 
able to the Tripe de Roche of the arctic hunters. Its nutritive qualities are probably 
equal to those of the jelly derived from other Algae. 
3. Nostoc verrucosum , Yauch. ; aquatic ; fronds large, gregarious, confluent, sub- 
globose, plaited, at length hollow, blackish-green. Yauch. t. 16, fig. 3. Ag. Syst. p. 21. 
Harv.Man. Ed. 1 ,p. 185. Hass. Brit. Fr. Wat. Alg.p. 291, tab. 7 5, jig. 1. Kutz. 
Sp. Alg. p. 300. 
Hab. On stones in fresh water streams. Pools of fresh water, Isle of Disko, and at 
Beechey Island, Arctic Regions, Dr. Lyall. Santa Fe, New Mexico, Fendler. 
Fronds gregarious, at length confluent, adhering firmly to the rock on which they 
grow, becoming hollow and torn in age, and finally floating to the surface. Colour a 
bottle-green. Glossy when dry. 
4. Nostoc cristatum , Bailey ; aquatic , fronds orbicular, piano-compressed, firm, 
smooth or tuberculated, attached by a point of the circumference, erect. N. nummu- 
lare , Harv. MS. in Herb. 
Hab. In rivulets, attached to stones under water. Near West Point, Professor 
Bailey. Crumelbow Creek, Hyde Park, N.Y., W.H.H. (v. v.) 
This pretty little species grows on stones in running water and may possibly be of 
common occurrence. The fronds are circular, about half an inch in diameter, or rather 
more, the tenth of an inch in thickness, piano -compressed and solid ; but perhaps in age 
they would become hollow, and then would probably be spherical. Such inflated fronds, 
however, have not yet been seen. They are fixed to the stones on which they grow by 
a single point of the circumference, and stand erect, like miniature cock’s-combs, whence 
the specific name cristatum bestowed by Professor Bailey. The substance is very firm 
and cartilaginous. The filaments are much curled and very densely packed together, 
moniliform, and of a dark bluish-green under the microscope. The colour of the frond 
to the naked eye is a dark olive-green, blackish rather than blueish. 
5. Nostoc Sutherlandi, Dickie ; “discoid, coriaceous; filaments crowded ; cells mostly 
spherical.” Dickie in App. Suth. Yoy. 1, p. 193. 
Hab. South side of harbour, in winter quarters, Baffin’s Bay, July, 1851. Dr. 
Sutherland. 
“ The plant is one to two inches in diameter, attached by one point of the margin. 
Plicato -venose beneath, the plicae radiating chiefly from the point of attachment ; faintly 
venose above, especially near the point of adhesion ; toward the margin reticulately 
venose.” Dickie , l. c. 
