NOTES ON MOSSES. 215 
The young fry of the Coregoni and grayling, unlike that of 
trout and salmon, do not remain long near the bottom of the 
hatching tray, but soon begin to swim about on the surface of the 
water. 
As soon as they are observed doing this, a catch trough, with a 
large wire netting bottom, must be placed under the spout of the 
incubator, and at the same time the second or smaller tray d 
removed. 
If this step were omitted many of the fry drawn by the current 
against this smaller tray would be pressed against and through the 
wire netting. 
NOTES <ON (MOSSES. 
NATURAL and interesting genus named after John Bartram, 
an American botanist and traveller, is the Apple Moss, Bar- 
tramia. 
Of those fruiting, all the species except two fruit in May and 
June, and are found inhabiting our rocks, moors, and marshés. 
They are perennial, czespitose Mosses, with terminal fructifica- 
tion, papillose lanceolate leaves, striated subspherical capsules, 
and small conico-convex lids. Areole small, quadrate, nerve 
strong, continued to the apex of the leaf or excurrent. 
B. pomiformis, the common Apple Moss, is the typical species, 
and is found on dry shady banks, in sandy soil. Stems densely 
tufted, glaucous-green }—2 inches in length. Leaves crowded, 
crisped or tortuous when dry, linear-lanceolate ; flat, doubly spinu- 
loso-serrate, rough, nerve slightly excurrent; fruitstalk about an 
inch long. Capsule subglobose, cernuous, reddish-brown and fur- 
rowed when dry; lid small, conical; peristome double; inner 
peristome shorter than the outer teeth, with or without cilia. Fig. 55. 
Haller’s Apple Moss, 4. Halleriana, and. B. ithyphylla, the 
straight-leaved Apple Moss, are found on moist alpine and sub- 
alpine rocks. . Gdert inhabits moist, shady calcareous rocks. 
B. stricta is only recorded from Maresfield, Sussex. 
LPnilonotis fontana, the fountain Apple Moss, is common near 
springs and in wet places, and has stems 1-6 in., with reddish-black 
radicles ; leaves ovate-acuminate, short; nerve almost excurrent ; 
perigonial leaves, obtuse, nerveless; capsules subglobose, large, 
furrowed when dry. 
f. sertata and P. adpressa are very rare. 
f. caicarea, the thick-nerved Apple Moss, grows in dense patches 
of a pure and intense green colour; leaves ovate-lanceolate, 
