of Edinburgh, Session 1883-84. 
765 
although the pectoral fins were present as horizontal folds with a 
- semicircular outer border. 
It is obvious that unless the pre-anal ventral fin in the cases 
mentioned can he explained as a secondary arrangement of certain 
Teleosteans (a supposition which is not rendered more probable by 
the fact that the herring is a physostornous form with pelvic fins in 
their original position), its presence forms an obstacle to the 
universal application of D ohm’s theory ; and a re-examination of 
this most interesting subject is necessary in view of the facts I 
have pointed out. From Dohrn’s point of view the coexistence of 
functional intestine and median ventral fin in the same part of the 
body is impossible. 
4. Tenth and Final Eeport of the Boulder Committee ; 
with Appendix, containing an Abstract of the informa- 
tion in the Mne Annual Eeports of the Committee; 
and a Summary of the principal points apparently 
established by the information so received. (Plates 
VIII. to X.) 
The Committee are of opinion that it is now time to submit a 
final Eeport to the Council. Xine Annual Eeports have already 
been presented, extending altogether to about 400 pages, as printed 
in the Proceedings of the Society. The appointment of the Com- 
mittee took place in April 1871, and the first Eeport was presented 
in April 1872, by which time a considerable number of answers 
were received to circulars sent by the Committee, first to the 
parochial clergy, and next to the parochial schoolmasters, asking for 
information. 
The Committee do not expect that, by continuing inquiries on the 
lines available to them, much additional information of importance 
would be obtained. At all events, it is now desirable to arrange 
the information which has been obtained, in such a way as to make 
it more readily accessible — as, for example, to show, in what dis- 
tricts the most interesting Boulders are situated, and also to indi- 
cate the conclusions which the positions of the Boulders, or any 
markings on them, suggest. 
