17^^ The I) iUi Naturalist. Aucrust. 



Skptp:mrkk iqth. — A third dredgiiii^ for this district gave 

 from 9 fatlioms off Bullock Harbour, 6 specimens of Polyccva 

 occctiafa, one o[ Don's aspaa and one of the pretty and rather 

 rare Sucker-fish, Lepadogaster bimaadatus. But the best 

 yield of the day was from 9 fathoms towards the northern end 

 of the Sound, where three specimens of Aiitiopa cristata were 

 taken, one of them i; inch long, a ver}- welcome confirmation 

 of the first Dublin record for this rare nudibranch from 

 almost the same spot, where a poor specimen was dredged in 

 September, 1906. ^ 



October 31st. — This daN^'s dredging, the last for the j^ear in 

 the Dalkey district, was remarkable for a haul of very rich 

 material made in 16 fathoms off the Muglins. We had 

 evidentlj' happened upon a hollow in the sea floor into which 

 the strong tidal currents prevalent about here had swept 

 myriads of dead shells, and with one lucky scrape the dredge 

 had brought up an epitome of the marine mollusca inhabiting 

 the neighbouring rock}' shores and reefs. The examination 

 of the material is not 3'et finished, but so far it has yielded 

 me no less than no species of mollusca, the greatest number 

 I have ever obtained from a single haul on any part of the 

 Dublin coast. Though the shells were mostl}^ dead, man}' 

 were quite fresh, and perfect specimens of nearl}' all of the 

 species were included in the fragmentar}' matter which formed 

 the basis of the material. Amongst the no species identified 

 were three new to County Dublin waters. These three are 

 printed in italics in the following list, which shows the more 

 rare or local species included in the haul, the number of 

 specimens being added as a guide to relative frequenc}" : — 



Aclis supranitida, i. Eulima biUneata, 20. 



A. unica, 2. Odostomia Warreni, i. 



Capulus hungaricus, i. O. .spiralis, 97. 



Rissoa punctura. 152. O. in.scuipta, 42. 



R. reticulata, 184. O. decussala, 10. 



R, semistriata, 519. O. conoidea, 6. 



R. costata, 33. O. albella, 15. 



R. vitrea, 2. Eulimella aciiula, 4. 



R. soluta, 205. Utriculus mammillatus, 5. 



R. striatula, i. Leda minuta, 2, and 27 valves. 



Adeorbis subcarinatiis, 177, Lima Lo.sconibi, 2 frags. 



Caecum glabrum, 107. Astarte triangularis, 677. 



C. trachea, 4. Circe minima, 7 valves. 



1 Irish Naturalist, I907i P- 160. 



