274 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
in Herb. Hooker, Kew, has the curled edges of the lacinize studded over with bi: 
distinct, pale, brownish-yellow tubercle-like spermogones. 
Species 5. C. plicatile, Ach., 
Which occurs in Northern America and Europe. Iam inclined to refer this 
species to C. pulposum. 
Specimen 1.—Hepp. exs. 86; on the banks of the Lake of Zurich, Switziat 
Jand; with apothecia. The spermogones are reddish tubercles, seated on the 
margins of the lobes. Exs. 215 (sub C. turgidum, Ach.); on calcareous rocks, 
Switzerland. In the upper specimen, the spermogones are marginal, distinct - 
tubercles, brownish-red, and with a perceptible ostiole. In the lower specimen, 
they are whitish or paleish-brown externally, yellow within. The spermatia of — 
this species are rod-shaped, jmth long, and 3;;nth broad. 
SPECIES 6. C. pulposwm, Ach., 
A widely-spread species, growing in Europe, Africa, Asia, and Northern America. 
Its spermogones are immersed disks or tubercles, brownish-yellow externally, 
whitish within. The ostiole, which is, in the young state of the spermogone, very 
minute, round, and inconspicuous, enlarges sometimes with age, until it forms a 
large irregular perforation or cavity. The edge of the thallus as well as the 
exciple of the apothecia are sometimes studded over with very conspicuous, 
ragged, deep perforations, which are the ostioles of old spermogones. 
Specimen 1.—(Sub C. chalazanum, Ach.) ; in Herb. Hooker, Kew ; no habitat 
given,—but apparently from Dr Acuarius. The turgid margins of the thalline 
lobes as well as the exciple of the apothecium are studded over with abundant 
spermogones, which are brownish-yellow or tawny-coloured round wartlets, con- 
spicuous amid the deep leek-green tissue of the thallus. They bear on their 
apex a deep-brown papilla, which marks the ostiole; the former is frequently 
irregular in form. The papilleeform ostiole expands with age into a large irre- 
gular perforation. The spermatia are rod-shaped, about gmth long, and sith 
broad; another specimen, also in Herb. Hooker (sub nom. C. erispwm, Nyl.), has 
the edge of the lobes profusely dotted over with spermogones. 
Specimen 2.—Lisclash, Fermoy, Ireland; coll. T. CHanpter; in Herb. Carroll. 
The spermogones are seated on the top of tumid marginal warts; they are, as 
usual, of a pale, brownish-yellow colour. The spermatia are rod-shaped, auth 
long, and swoth broad. In specimens from Malham, Yorkshire, coll. Dr Carrine- 
TON, the spermogones are also seated on the tops of turgid marginal warts. 
Specimen 3.—Var. tenax, LEIGHTON exs. 105 (sub Collema limosum, Ach.) ; Twy- 
cross, Leicestershire (E. B. Suppl. 2704, f.1.) The spermogones are marginal, 
brownish-yellow, distinct, circumscribed from the surrounding green of the thallus. 
Specimen 4.—Var. tenax, Hepp. exs. 87 (sub Collema multijliorwm); on moss, 

