Mollusks. 4423 



among other emendations, " Zizyphinus. Incorrectly Sisyphinus. 

 Zizyphum, jujube, a kind of fruit." 



Alabaster Pyramid-Shell, Trochus alabastrum. Rare. " Lieut. 

 Thomas has dredged it on a stony bottom in sixty fathoms, off Troup 

 Head, Aberdeenshire," F. fy H. Mr. Macdonald has also (August, 

 1852) dredged this species in forty fathoms, off Lossiemouth. 



Martin's Pyramid- Shell, Trochus millegranus [T. Martini, Mac.) 

 Occasional. " In thirty to thirty-five fathoms, Moray Firth (Mc An- 

 drew and E. F.)," F. fy H. " This pretty Trochus " has been sparingly 

 found at Lossiemouth, and an example of it has been met with by 

 Mr. Murray at Burghead. 



Tumid Pyramid- Shell, Trochus iumidus. Common. 



Gray purple-streaked Pyramid- Shell, Trochus cinerarius. Very 

 common. All the species of this genus, particularly the present, are 

 provincially known as " sillar- or silver-buckies." 



Waved Trochus, Trochus undulatus. From among shell-sand col- 

 lected on the South-eastern coasts of Caithness, by the Rev. Mr. 

 Whyte, of Canisby. 



Pearly Pyramid-Shell, Trochus Helicittus, (Turbo margarita, Flem., 

 Phorcus margarita, Mac.) Frequent near low-water mark and in 

 shell-sand. To this list of Moray- Firth Trochi one addition at least 

 may be expected to be made by future observers, viz., T. Montagui, 

 found " in thirty fathoms at Buchanness, and from seven to forty 

 fathoms in Orkney," F. $ H. 



Messrs. Forbes and Hanley (p. 525, vol. ii.) quote Dr. Macgillivray's 

 Monodonta crassa, two specimens of which were found near Peter- 

 head (Aberd. Moll. p. 325), as a synonym of their Trochus lineatus, to 

 which species they however assign a " South-western and Western 

 range," and thus, as it were, exclude the Aberdeenshire locality. 

 They also state that Trochus umbilicatus " is absent from the entire 

 Eastern side of Britain " (p. 522) ; yet the Trochus umbilicatus of the 

 Aberdeenshire Mollusca is quoted as the same species, which, by Dr. 

 Macgillivray (p. 325), is said to be " common about Slains, Peterhead 

 and Banff." These two statements are evidently at variance ; but the 

 error probably originated with Professor Macgillivray. It is not at all 

 likely that the true T. lineatus has been found so far North. 



Painted or Oval-banded Phasianella, Phasianella pullus, (Cingula 

 pullus, Flem. ; Rissoa pullus, Mac.) A few fragments of this beauti- 

 ful little shell were found in shell-sand collected on the S.E. shores of 

 Caithness. They were probably, however, brought there, from a more 

 westerly locality, by the tidal currents through the Pentland Firth. 



