BELFAST DREDGING COMMITTEE. 933 
Species. Observations. 
Odostomia unidentata ... Hidend dead. 
-—— acuta, A. dead. 
—— eulimoides, A. ...... dead. 
—— plicata, A dead. 
— — interstincta, A....... dead. 
—— spiralis, A..,... Meee dead. 
Natica nitida frequent dead. 
7 scarce dead. 
—— Montagui rare dead. 
Velutina levigata scarce dead. 
Trichotropis borealis scarce dead. 
Cerithiopsis tubercularis.. scarce dead. 
Murex erinaceus rare dead. 
Purpura lapillus..........0. not common | dead. 
Nassa reticulata scarce dead. 
—— incrassata ......6006 ° scarce dead. 
—— PYZMeA? .rsecsaeeee rare dead |(Dr. Dickie.) 
Buccinum undatum frequent dead |Fry very common. 
Fusus Islandicus frequent dead |Very common. 
—— antiquus frequent dead. 
Trophon clathratus, A,...} frequent dead. 
—— muricatus, A..... frequent | dead. 
—— -Barvicensis, A....... scarce dead. 
Mangelia turricula, A. ... scarce dead: 
—— rufa, A. 
—— septangularis. 
GETES ..esccseeee eats dead |Fragments. 
linearis, A. 
— nebula. 
—— striolata. 
—— costata, A. 
—— Holbollii, A.......... This rare shell, new to the British list, 
was first discovered in shell sand 
dredged up in 1856. It was distin- 
guished at once by both Mr. Waller 
and Mr, Hyndman as differing from 
any species described by Forbes and 
Hanley, and was determined by Mr. 
Alder. 
_ | Cypreea Europa .........| frequent 
| Ovula patula ....... Soonaace very rare A single specimen (Mr. Waller). 
—— acuminata....... ees] Very rare Ditto (ditto). 
rare 
scarce 
scarce 
é scarce 
| Bulla Cranchii very rare A single specimen each to Dr. Dickie and 
| Seaphander lignarius rare G. 
_ | Philine aperta ....... seeee scarce 
_|——scabra . rare 
It will be seen from the foregoing list that with few exceptions the shells 
are dead and many of them inhabitants of deep water ; it therefore became 
_an object of interest to discover the locality from whence they were derived, 
and this may now be considered to be ascertained. In Admiral Beechey’s 
_ Hydrographic Survey there is indicated a deep recess in the Channel not 
_ far distant from an extensive ridge of rocks lying off the entrance to Larne 
_ Lough, on which the two Maidens Lighthouses are erected. Here in a 
limited area is a depth of from 80 to 100 fathoms; but it is difficult for 
