PI.KISTOCKXH FOSSILS. 26:' 



Ht'ci'iit — Coawl of Nova Suotia. I liavc ohtainod speciniL'ns from Mr. 

 Dowiics of Halifax, l)iit have not clsuwliore seen tlie .speiies recent. 

 It is /). ('(hlciuille/iHiii ni li.sts of Scandinavian fossils and 1). (iilipd of 

 .MuUcr. It is a widely ditViiseil Arctic and North Atlantic species. 



This .Acorn siudl is very almndant at Riviere-dn-Lou]), and tine 

 specimens are found entire, attaciied to stones and Itoulders in the 

 houldei'-clay. 



\'ery tine specimens ai'c also ohtained at Kiver licaudette, ahout 

 'M miles west of Montreal. 'J'iiis locality is noteworthy as being 

 further Mest than the others mentioned, 'i'he specimens are also 

 interesting from their remarkahle perfection and the large masses 

 which they form, some of whicii contain as manj' as a dozen individuals 

 attached to each other. They were collected \>y Mr. A. \V. McNown, 

 of Kivieie Heaudette, and by Mr. Stanton, C.I'^,of Lancaster. 



The animals seem to have been covered, when living, with an irrup- 

 tion of sand, for the opercular valves of many f>f them are still in place, 

 and, owing to a slight infiltration of calcareous matter, the radial plates 

 and opercular valves have been cemented together, which accounts for 

 Hieir perfect preservation. It is to be observed, however, that the 

 shells of llalani are composed of a remarkably dense and indestructible 

 calcium carbonate, much less perishable than the shells of most moUusks. 



The original attachments of the animals, so far as observed, have 

 been on pebbles on tiie sui'face of clay, and as tliese allbrded space only 

 for one or two individuals, the young were obliged to attach themselves 

 to the old in successi\'e generations, forming grotescjue groups, which 

 still remain entire. They are associated with St.rictfCd rtiyom, Mya 

 (irenitriu and Macoma Grindnndicd, 



Balan us porcat as. DaCosta. 



Fossil — IJeauport ; glacial beds of Europe. 



Recent — Gulf St. Lawrence, and coast of New England ; Labrador 

 (Packard); and Arctic and Northern seas generally. It is no doubt 

 Lcpus bahiHUS of Fabricius from CJreenland. 



Much more rare in the Pleistocene than the preceding species. 



Balanns crenatus. Brug. 



Fossil — Montreal ; Quebec ; Riviere-dii-Loup ; Anticosti ; St. John, 

 N.li. (Matthew) ; Labrador (Packard) ; Portland, Maine ; glacial beds 

 of Europe ; Vancouver Island (ft. M. I). ) 



Recent — Arctic and nortiiern seas, Greenland ; (iulf St. Lawrence 

 and American coast. It seems to be Lepas halanaris of Fabricius, 

 from (Jreenland. 



