DUSKY GROUSE. 89 



only 2j twelfths; on their inner surface are six longitudinal villous ridges, 

 the intervals between which are also covered with prominent villi, as is the 

 whole interior of the intestine. There is no enlargement of the rectum. 



The trachea is 5j inches long, much flattened, at first 3 twelfths in 

 breadth, presently contracting to 24 twelfths, and so continuing until toward 

 the lower end, where it gradually enlarges to 3i twelfths. The rings are 

 very feeble, slightly ossified, 102 in number, with 2 dimidiate rings. The 

 lateral muscles are slender, as are the sterno-tracheal. There are no inferior 

 laryngeal muscles. 



Trillion Pictdm, Pursh, Flor. Amer. Sept., vol. i. p. 244.— Hexandria Trigynia, 

 Linn. 



This plant, as well as the other species represented, grows abundantly in 

 Maine, in all such secluded places as are frequented by the Spotted Grouse, 

 which eagerly devours its berries. It has ovate acuminate leaves, of a light 

 green colour, thin and undulated; an erect peduncle; white flowers, veined 

 with purple at the bottom, and having the petals lanceolate, recurved, nearly 

 twice the length of the calyx. The berries are ovate and of a scarlet colour. 



Streptopcs distortds, Mich., Flor. Amer., vol. i. p. 200. Pursh, Flor. Amer. Sept., 

 vol. i. p. 232. — Hexandria monogynia, Linn. 



About two feet high, with alternate, amplexicaul, ovate, acute, ribbed, 

 light green leaves; greenish-yellow flowers, on pedicels which are distorted 

 in the middle; and oval scarlet berries. 



DUSKY GROUSE, 



4-Tetrao objscurus, Say. 



PLATE CCXCV— Male and Female. 



As I have never seen thi3 species in its native haunts, I am obliged to 

 have recourse to the observations of those who have had opportunities of 

 studying its habits. The only accounts that can be depended upon are those 

 of Dr. Richardson, Mr. Townsend and Mr. Nuttall, which I here give 



