2IO 



The Irish Naturalist. 



October 



Having shown in this list the. varied contents of a successful 

 haul, it remains only to set out the more interesting results of 

 the dredgings as a whole : — 



Chiton cinereus.— Apparently rare ; detected only in two hauls, in 



12 fath., quite close to Rockabill, and in 13I fath. E. of Church Is,, 



2 living specimens in each. 

 Velutina laevigata.— Only once taken, a single living specimen in 



14 fath. I have never found this in shore collecting in Co. Dublin. 

 Adeorbis subcarinatus.— One dead shell in 13 fath. 2 miles E. of 



Shennick's Is. 



Skenea planorbis. — Abundant on sea weeds at low water, Red Is. 



Distributed all along the Dublin coast, where I have gathered it, 



chiefly on Laiirencia pinnatijida, at Ballybrack and at Balbriggan. 

 Trophon muricatus.— Quite a nest of this species was encountered 



in 14 fath. N. by E- of Church Is., 22 specimens living or dead coming 



up in the net. 



Defrancia gracilis. —Twice brought up, once in 131 fath. E. of 

 Church Is. (a single shell), and again in 14 fath. (2 shells), all three 

 shells large and perfect but empty. Dredged off Skerries by Walpole 

 more than 50 years ago. 



D. linearis.— Brought up in 4 different hauls ranging from 8 to 14 

 fath., 6 specimens in all, none living but the shells quite fresh. 



Pleurotoma costata. — One specimen in shell sand, Skerries beach. 

 Quite frequent on the Shelly Bank, Dublin Bay, August, 1905. 



P. turricula. — A single dead specimen at 13 fath. and another at 14 

 fath. off Church Is. Also dredged at Skerries by Walpole upwards 

 of 50 years ago. Not infrequent on the North Bull and Shelly Bank, 

 Dublin Bay, where I gathered it in June and August last. One of the 

 North Bull specimens measured fully | in. in length. 



Utriculus obtusus, | — Both brought up dead in the same haul from 8 



U. truncatulus, jfath. off Colt Is., only two examples of each. 

 The first species I found rather frequent in shell sand at North Bull 

 in June last. 



Phlline aperta, — In great profusion, living, in stiff mud near the 

 mouth of Skerries Harbour at a depth of from 3 to 4 fath., some hauls 

 here bringing up fully 50 specimens of all sizes from \ in. to in. 

 A single shell brought up from 13 fath. between Church Is. and 

 Rockabill. Though a common species, I have not so far found either 

 the animal or the shell cast up on the Dublin coast. 



Dentalium entalis. — Living in three distinct hauls from 8, 13, and 15I 

 fath., but not abundant, the largest number in any one haul being 3. 



Nucula nitida.— Living in vSeveral hauls from 3 to 13 fath. Most 

 frequent at depths from 3 to 4 fath. in mixed sand and mud, fully a 

 dozen specimens coming up in one haul. N. nudeiis, though found 

 living here at 13 and 14 fath., was much rarer. 



IVIodioIaria marmorata.— A single living specimen from 12 fath. 

 quite close to Rockabill, 



