BELFAST DREDGING COMMITTEE. 117 



Cylichna Lajonkaireana (Baster). From the Turbot-bank, dead ; determined by Mr. Jeffreys 



in Mr. Hyndnian's cabinet. 

 Mangelia attenuata, dead. Turbot-bank sand, Mr. Waller. 

 reticulata, dead. A single specimen of tins rare and beautiful shell was found by 



Mr. Jeffreys in dredging from the deep water north of the Maidens. New to the 



Irish list. It is a southern form. 



costata, var. coarctata, dead. Near the Turbot-bank. 



Fusus Islandicus, var. gracilis (Alder), living. In 60 fathoms, about six miles from the 



Gobbins. 

 Buccinum undatum, var. striatum, Pennant ; living. With the last. 

 Cerithiopsis pulchella, dead. In Turbot-bank sand, Mr. Waller ; erroneously recorded in 



the list of 1857 as Cerithium metula. 

 Trichotropis borealis, living. Turbot-bank. 



Lamellaria perspicua, living. In 80 fathoms north of the Maidens. This is usually a sub- 

 littoral species. 

 Natica helicoides, dead. A single young specimen by Mr. Jeffreys. 

 Cerithium metula, of the list for 1857, was found by Mr. J. to be Cerithiopsis pulchella. In 



dredged sand, Turbot-bank. 

 Euomphalus (Omologyra) nitidissimus (Skenea nitidissima), living on Zostera marina. 



Shores of Lame Lough. 

 Skenea divisa, living. Off Lame, 1858, Mr. Hyndman. 

 planorbis, living. A small variety occurs in Lame Lough, has a more convex spire, 



and it appears to bear the same relation to the typical form that the Helix rupestris 



of Continental authors does to our H. umbilicata, Mr. Jeffreys. 

 Jeffreysia Gulsona;, dead. Turbot-bank sand. In Mr. Hyndman's cabinet, determined by 



Mr. Jeffreys. 

 Lacuna crassior, living. Coast of Antrim. Mr. Jeffreys observed that the shell has a 



distinct canal or groove in the columella, evidently showing its generic position. 



The animal, which he examined, settles the question. It is of a yellowish white 



colour, having two subulate and slender tentacles, with the eyes placed on short 



peduncles at their external base ; proboscis long and narrow ; two rather long caudal 



filaments, one on each side of the operculigerous lobe. The creature is active in its 



habits, and seems fond of crawling out of water. 



labiosa, Loven, dead. In Turbot-bank sand, Mr. Jeffreys. 



Littorina fabalis, living. Found by Mr. Jeffreys on the shore of Larne Lough, and considered 



by him to be only a variety of L. littoralis. 

 tenebrosa, living. In the same locality as the last, and considered only a variety of 



L. rudis. 

 Scissurella crispata, dead. A fresh specimen taken in 80 fathoms, 5 or 6 miles north of the 



Maidens. 

 Margarita costulata (Skenea), dead. In Turbot-bank sand, Mr. Waller. 

 Trochus Montagui, living. An exquisite scalariform variety found by Mr. Jeffreys and Mr. 



Waller off the coast of Antrim ; the animal does not differ from that of the usual 



form. 



striatus, dead. In Turbot-bank sand, Mr. Jeffreys. 



Emarginula reticulata, living. In 80 fathoms north of the Maidens. Mr. Jeffreys found 



the fry, which closely resembles a Scissurella, and has a regular Trochoidal spire, 



with the edges of the slit inflected. 

 Propilidium ancyloide, living. On stones and shells in 70 to 80 fathoms. They were of 



different sizes, the largest not exceeding one-eighth of an inch, and evidently adult. 



The Patella cceca of Miiller, of which the authors of 'British Mollusca' supposed this 



might be the young, appears to be a very different species, if indeed it belongs to the 



same genus. (J. G. J.) 

 Patella athletica, living. Coast of Down, in Mr. Hyndman's cabinet. 

 Chiton cancellatus, living. Not uncommon in deep water. 



Hanleyi. A fine living specimen on a shell, and one on a stone in 80 fathoms. 



Argiope Cis'tellula, living. On stones as well as shells in the deeper water. 



Terebratula capsula, living. With the last. 



caput-serpentis, living. Of large size in the deep water. Some specimens kept living 



exhibited on the front margin a series of white filaments which appeared to protrude 



from the tubes of the shells, and not to be retractile when touched. 

 Pecten opercularis. Mr. Jeffreys remarks that the young have a rhomboidal form, and the 



lower or flat valve is much smaller than the other (which overlaps it), and is perfectly 



smooth. The ribs do not at first appear on the larger valve, but are preceded by a 



shagrcenerl reticulation. 

 furtivus, alive. Taken in 1858 by Mr. Waller and Mr. Hyndman on both the Antrim 



