Mollusks. 4425 



Striated Rissoa, Rissoa striata, (Cingula semicostata and striata, 

 Flem.; Odostomia semicostata and Marionce, also R. gracilis, Mac.) 

 Frequent in shell-sand from all parts of the Firth, and plentiful, alive, 

 between tide-marks at Burghead, Lossiemouth, &c. 



Small or Spot-banded Rissoa, Rissoa parva, [Cingula parva and 

 alba, Flem. ; R. alba, Mac.) Common. " Frazerburgh and Gamrie," 

 Mac. 



Semistriated Rissoa, Rissoa semistriata, {Cingula semistriata, 

 Flem. ; R. tristriata, Mac.) Frequent. 



Red Rissoa, Rissoa rubra, (Cingula rubra and unifasciata, Flem.) 

 Common. The variety unifasciata is also met with frequently. 



Reddish brown -banded Rissoa, Rissoa cingillus (Cingula cingilla, 

 Flem. ; R. cingillata, Mac.) Found in shell-sand from the South- 

 eastern coasts of Caithness. 



Slake Rissoa, Rissoa Ulvce, (Cingula Ulv<e, Flem.) "Abundant in 

 the estuary of the Findhorn," Mr. John Shand. 



From their known range it is most probable that the following spe- 

 cies will also be found in the Moray Firth, viz., Rissoa costata, 

 " Northumberland and Orkneys," and Rissoa inconspicua, " Scarbo- 

 rough and Lerwick. 



Although hitherto not met with in the Moray Firth, yet Jeffreysia 

 diaphana has been found on each side of it, viz., at " Lerwick" and 

 " Northumberland," F. # H. 



Brown Skenea, Skenea planorbis, (S. depressa, Flem. and Mac.) 

 Frequent in shell-sand. 



Ammonite Skenea, Skenea rota. Among some shells which Joshua 

 Alder, Esq., Newcastle, most kindly took the trouble of naming, was a 

 specimen of this rare Skenea, which was picked out of shell-sand 

 gathered on the South shore of the Moray Firth. 



Semistriated Skenea, Skenea divisa. " Frazerburgh," Macgillivray. 



Augur Turritella, Turriiella communis, (T. terebra, Flem. and Mac.) 

 Common all along the coast, and often taken up by the fisherman's 

 line. 



Pelican's-foot Aporrhais, Aporrhais pes-pelecani, (Roslellaria pes- 

 pelecani, Flem. and Mac.) This common shell is popularly known as 

 the " key of the sea." 



Sinistral Cerithium, Cerithium adversum, (Terebra perversa). A 

 well-marked portion of a shell was picked out of shell-sand collected 

 on the South-eastern coasts of Caithness. 



Trevelyan's Scalaria, Scalaria Trevelyana. Mr. Macdonald has 

 dredged a single specimen of this northern, yet pretty shell, off 



