154 TRANSACTIONS OF THE [FEB. 8, 



A few miles further east the shore is indented b}' Port Dis- 

 cover}' Bay an inlet very similar to Sequim Bay. For some 

 distance below the town of Port Discovery there extends on the 

 east shore a broad sandy beach abounding in sand-anemones, and 

 several laraellibranchs (2'aves Uaminea^ Cardium corbis, etc.). 

 The large number of "Lunatia collars" gave evidence of the abund- 

 ance of this Gasteropod. The large cockle, Cardium corhis, is 

 especially numerous here. It occurs just beneath the level of 

 the sand with its siphonal openings communicating with the 

 surface. It moves energeticall}' by means of its extremely 

 powerful foot, and is not infrequently found exposed on the 

 beach. 



West of Point Wilson there is a broad beach of compact till 

 probably produced by wearing away of the adjacent cliffs. This 

 is honeycombed in places by the burrows of the smaller "boring- 

 clam " Pholadidea petiita^ while more uniformly distributed is 

 thelarge \n(](\oc\i , Zirph fea crispala = PJwIas cri^pata of Authors, 

 which burrows verlieally to a depth of a foot or more. The sexually 

 mature animals of the latter, collected throughout the months of 

 July and August, showed some variation in size. The larger indi- 

 viduals occurred in seemingly greater proportion near low water 

 mark. Several specimens of Adulafalcala were observed each at- 

 tached by its byssus to the wall of discarded burrows of Pholadidea 

 peniia as was noted by Swan.* These piddocks are so exces- 

 sively thin-shelled that it becomes difficult to extricate them un- 

 injured from their burrows. This degeneration of the shell is 

 not unlikely a result of the protecting action of the till rendering 

 firm valves less essential to security. An annelid (Halla) also 

 makes its home in the till excavating burrows. 



Eastward from the above till flat there extends for several 

 rods a beach thickly strewn with rocks of various sizes, which 

 are richly covered with barnacles (Balaniis balanoides). Limpets 

 (Acmcea patina, A. pelta, etc.). Purpura saxicola and other Gastro- 

 pods. Several smnll tide pools amongst the rocks proved a rich 

 field for the collecting of Lvcernaria, campaiiulala, which occurs 

 attached to the upper surface of both the red and the green seaweed. 

 Both Liltorina .scutulata and Ij. aitchana occur in considerable 

 numbers at various localities along the shore of the Straits of 

 Juan de Fuca and Admiralty Inlet. These were taken mostly 

 on rocks situated near high water-mark. 



Between Points Hudson and Wilson the littoral region is 

 varied in character. In some localities there has been deposited 

 near low water line a bank of loose sand frequented by Cardium 



* Diagnoses of new Forms of Molluscs from the Vancouver district by Philip P. Car- 

 penter; B.A., Ph.D. Smith Inst. Misc. Coll., 2^2, 1872. 



