4304 Mollusks. 



Opaline Ascidia, Ascidia virginea, (A. opalina of Macgillivray). 

 * Moray Firth, Captain Otter," Forbes # Hanley. Very common. 



Coarse Ascidia, Ascidia sordida, (Alder & Hancock). Mr. Mac- 

 donald, of the Elgin Academy, finds an Ascidia which agrees very 

 well with the description of this species (Brit. Mollusca, vol. ii. 

 p. 372), and which is not uncommon in the Moray Firth. 



Sandy Molgula, Molgula arenosa. An occasional portion of the 

 food of the haddock. " Abundant, in about fifteen fathoms on 

 a sandy bottom off Lossiemouth, August, 1852," Mr. Macdonald. 



Wrinkled Pelonaia, Pelonaia corrugata. Also preyed upon by the 

 haddock. Several were found by Mr. Macdonald, on a fisherman's 

 line, at Branderburgh, 1853. 



The above must form but a poor enumeration of the Tunicata 

 of the Moray Firth ; and it is to be feared that little progress will be 

 made in the further identification, by casual observers, of the various 

 forms found in its waters, until the appearance of the promised work 

 on this tribe by Professor Goodsir : (See Forbes & Hanley's ' History 

 of British Mollusca,' vol. i. p. 3). The Botryllidae especially appear 

 to be well represented, Messrs. Macdonald and Murray having 

 observed at Burghead nearly a dozen distinct forms, some of them 

 identical with those figured (only) by Sir J. G. Dalyell : (' Rare 

 Animals of Scotland,' vol. ii. plates 40 and 41). 



Acephala lamellibranchiata. 



Curled Pholas, Pholas crispata. "Moray Firth (Mc Andrew), 

 F. §■ H. Valves are frequently found on the shore, particularly 

 between Stotfield and Covesea, and sometimes so fresh in their 

 appearance as to indicate that their native locality is at no great 

 distance from the shore. Found also in a fossil state in submarine 

 peat on the west side of Burghead. Mr. Murray has (October, 1853) 

 discovered it alive in abundance in argillaceous sandstone strata at 

 Burghead. 



White Pholas, Pholas Candida. Bay west of Burghead, along with 

 the preceding in peat. " Peterhead," Macgillivray. 



Arctic Saxicava, Saxicava arctica, {Solen purpureas and Hiatella 

 arctica, Flem.) Abundant, all along the shores of the Firth. Well- 

 marked specimens, young, in the shell-sand found at Burghead, &c. 



Wrinkled Saxicava, Saxicava rugosa, (Hiatella rugosa, Flem.) 

 Frequent. Occasionally found in limestone; often in the roots of 

 the larger Fuci. 





