of Edinburgh, Session 1878-79. 
113 
lowed out. If, however, the number and arrangement of the nasal 
sacs, as forming an element in the determination of the affinities 
of different Cetaceans, is deserving of the importance attributed 
to them by some writers, those of Beluga certainly seem to 
associate that genus with Monodon, and to separate it from the 
other genera above named. It should, however, he noted that the 
suh-division of the trachea into four bronchi in Monodon is widely 
different from that which obtains in Beluga and in every other 
toothed whale of which we have any knowledge, with the single 
exception of Pontoporia. In view of the scantiness of information 
regarding the anatomy of Monodon, the determination of the exact 
affinities of Beluga must he left to future observers. 
2. Fifth Report of the Boulder Committee. 
The Committee had submitted to them Rotes by the Convener of 
two visits to the West Highlands (including the Outer Hebrides) 
which he had made during the summer and autumn of 1878. These 
Rotes, accompanied by diagrams of boulders and striated rocks, afford 
a large amount of information hearing on the subject of boulder 
transport, the direction of transport, and the agent of transport. 
There has also been laid before the Committee a report by 
William Jolly, of Inverness, one of its members, “ On the Transpor- 
tation of Rocks found on the Shores of the Moray Firth;” as 
also Rotes by Messrs Somervail and Henderson (Edinburgh), “ On 
Boulders and Striated Rocks in the Pentland Hills.” 
The Committee have had an opportunity of seeing these Rotes 
and Reports in printed proof sheets. The Convener, on his own 
responsibility, sent the MSS. to the printer ; and the Committee 
approve of his having taken this course. 
Rotes by Convener of two Yisits to the West Highlands and 
Hebrides in Summer and Autumn of 1878. 
I. — ISLAND OF IONA. 
The Convener having occasion to he in this island for a few 
hours, went to the boulder referred to in the Committee’s Second 
Report, situated on the west side of Dun-Ii hill. 
Its peculiar position appearing to him to deserve a more special 
notice, he gives in fig. 1 a sketch of it taken from the north. 
