372 REPORT—1862. 
piperata, Mya truncata, Saxicava rugosa, and Hypothyris psittacea, besides the 
Pecten islandicus, which is not unfrequently dredged. 
Some of these fossil shells have been found in almost every haul of the 
dredge, as Astarte elliptica, Tellina proaima, Pecten islandicus, and Saxicava 
rUgost. 
“All the others, with the exception of Scrobicularia piperata, have been 
found in three different spots, viz. the Hole, before mentioned, opposite the 
mouth of the Ythan, 6 miles from land, in 40 fathoms, and opposite the 
mouth of the Ugie, 6 miles from land, in 35 fathoms,—that is, exactly at each 
extremity, and in the middle of the space which has been dredged over by 
Mr. Dawson. 
But although the fossil species found appear to be principally confined to 
the three spots indicated, yet the presence of some of them wherever the 
dredge has been used tends to prove that a tertiary bed extends along the 
whole coast and to a great distance seaward, some of these fossils having 
been brought up 30 miles from land by the fishermen’s lines. Of the 17 
apparently fossil species enumerated, 10 have been found in a decidedly 
fossil state in the drift clay in different parts of the county *. These are— 
Trophon scalariformis...... at Belhelvie, near the sea. 
Natica clausa............s.0866 at King Edward, several miles from sea, 
helicoides.............+ at King Edward, ditto. 
Astarte arctica ...........065 various places. 
CLIN HIGA) «sevens venecdne es ditto. 
Tellina proxima ditto. 
Serobicularia piperata ...... raised beach at Ythan Mouth. 
Mya truncata ..........s0006 Kang Edward. 
Saxicava rugosa ...s.sseseee Belhelvie, &c. 
Pecten islandicus ............ ditto. 
Of species usually accounted rare, the following are rather common in this 
district, viz.:— 
Lepton nitidum. Aclis ascaris. 
convexum. supranitida. 
Lima subauriculata. Eulimella Scille. 
Skenea divisa. acicula. 
—— costulata. 
There are a few species enumerated by Dr. Gordon in his ‘ List of the Mol- 
lusea of the Moray Firth’ which do not appear to have been found by Mr. 
Dawson ; the late Prof. Macgillivray also, in his ‘ Mollusca of Aberdeenshire,’ 
records some which Mr. Dawson has not met with. 
Note on BoLocera EQUES. 
Dredged off Peterhead in 35 fathoms on June 20, 1862, and still alive. 
Base.—As described by Mr. Gosse in his ‘ Actinologia Britannica,’ 
Column.—Upper half covered with longitudinal rows of close-set warts, in 
ordinary circumstances not minute, but very variable in size at the pleasure 
of the animal. 
Disk.—As described in ‘ Act. Brit.’ 
Tentacles.—Arranged as described in ‘ Act. Brit.,’ but several of them hay- 
ing double points, and thus causing their number to appear to be 150 or up- 
wards, They are extremely variable in shape, being sometimes contracted 
to a mere thread, and at other times distended till they are almost globular. 
* Mr. Jamieson of Ellon supplied Mr. Dawson with this list of fossils. He has speci- 
mens of many other Arctic shells from the same beds, but these are either still alive in the 
district, or have not been found with the dredge. 
