Rev. E. Williams’s List of Shropshire Lichens. 183 
a reddish-brown longitudinal streak is seen on each side, com- 
-mencing at the head and running along the back; but these 
usually reach only to the glandular stomach. 
In conclusion, [ may cite an observation upon the occurrence 
of the freed, sexually mature bud offspring (Sacconereis and 
Polybostrichus), which I do not find mentioned anywhere else. 
These bustle about exactly in the manner of the swarming 
Annelide-larve, and, indeed, among the latter at the surface 
of the sea; so that, in nearly every glass filled with the small 
animal forms fished from the surface of the calm sea by means 
of the fine net, I regularly found several of them, and usually 
male examples. These possessed great mobility. Primary 
individuals I have never found at the surface ; and the reason of 
this is easily understood. ’ 
EXPLANATION OF PLATE VIII. 
Fig. 1. Anterior part of Autolytus prolifer, with the head, the first body- 
segments, and the principal sections of the alimentary apparatus : 
a, cesophageal tube, with its circlet of pointed denticles at its 
anterior orifice, and its posterior half bent into loops; 8, glan- 
dular stomach ; ¢, intestine. 
Fig. 2. The posterior segments of the primary animal, containing ova, with 
-a young animal adhering to them, still united with them by a 
common intestine, and completely filled with ova: d, the new- 
formed head of the young animal, with the new-formed eyes and 
tentacles. : 
Fig. 3. Composite uncini of Avtolytus prolifer. 
XXVI.—Notule Lichenologice. No. XXI. 
By the Rev. W. A. LeiautTon, B.A., F.L.S. 
_ Amonest the MSS. of the late Rev. Edw. Williams, Incum- 
bent of Battlefield and Uffington, Shropshire, is a catalogue 
of all the plants which he had detected during many years’ 
careful herborization of the county of Salop. Mr. Williams 
was in frequent correspondence with Sir J. E. Smith, the 
Sowerbys, and other contemporary botanists. His accuracy is 
well known, and perfect reliance can be placed on any plant 
which he recorded. The whole of the Saabens, so far as 
_ regards the flowering plants, is. embodied in my ‘ Flora of 
_ Shropshire.’ But I have thought it might not be altogether 
__ unacceptable to publish the list of Shropshire Lichens. Though 
- not a complete list, it is a fairly comprehensive one, consider- 
_ ing that at the period of its compilation the microscope was 
not used in the determination of these plants. 
To this list I have added between brackets [ ] brief remarks 
