57 
On thallus of Cladonia digit ata. 
Spores as in Abrothallus oxysporus (q. v.), but smaller. 
4. L. associata, Th. Fries, Lich. Spitsberg., 42. 
On thallus of Lecanora tartarea. Spores 8, ellipsoid or 
subspherical. “ Ad fungos facile rejicienda,” says Fries. 
5. L. Cetraricola, Lindsay (Observations on Greenland 
Lichens). 
On thallus of Cetraria Islandica, Braemar, Scotland ; and 
Dovrefjeldt, Norway. 
Spores very small, ellipsoid. 
6. L. vemalis, Ach. (Nyl., Scand., 201), on dead Peltidece. 
Apothecia reddish ; spores sometimes in this athalline form 
are obscurely 2-locular, oblong. 
7. L. episema, Nyl., Prod., 125. 
On thallus of Lecanora calcarea and Squamaria saxicola. 
Spores sometimes 2 — 4-locular, ellipsoid, or oblong. Ny- 
lander suggests that it should perhaps be considered an athal- 
line form of Lecidea parasema, whose spores, however, are 
pretty constantly simple. 
B. Spores 2- or more-locular, usually coloured (brown). 
8. L. parasitica, Flk. (Nyl., Prod., 144). 
Syn. L. inspersa, Tul., Mem., 118 : Leight., Exs., 
No. 183. 
L. lygcea, Hepp. 
Biatora, Fw. 
Buellia, Flk. 
Dactylospora Florkei, Kbrb., Syst., 271. 
D. inspersa, Mudd. 
Leciographa Florkei, Korb., Par. 
Celidium insitivum, Korb., Syst., 217. 
Celidiopsis, Korb., Par., 458. 
(To be continued.) 
On Rhabdopletjra, a New Form of Polyzoa, from Deep- 
Sea Dredging in Shetland. By Professor Allman, 
F K S 
With Plate VIII. 
I am indebted to the JRev. A. Merle Norman for having 
placed in my hands for examination some of the products of 
dredgings recently carried on at various depths in the Shet- 
land seas by Mr. J. Gwyn Jeffreys and himself. Among 
these by far the most interesting is a Polyzoon obtained 
from a depth of ninety fathoms. It is not only generically 
