COOKE : ON THE MACANDREW COLLECTION. 363 



More elevated, with many distinct impressed striae, 



surface less smooth and shining. 

 Trochus (M.) Groenlandicus Chem. var. leevior. Skye. 

 T. (M.) amabilis Jeffr. Zetland. 



Three perfect specimens (one with operculum), two 



imperfect, of this rare and lovely shell. 

 T. (Gibbula) magus L. Carnarvonshire. 

 T. (G.) magus L. var. alba. Hebrides. 

 T. (G.) tumidus Mont. Anglesea, &c. 



As usual, the northern are much larger than the 



southern specimens. 

 T. (G.) tumidus Mont. South of England. 

 T. (G.) cinerarius L. Britain. 

 T. (G.) cinerarius L. var. electissima. Weymouth. 

 T. (G.) cinerarius L. var. Orkney. 

 T. (G.) umbilicatus Mont. Isle of Man, &c. 

 T. (G.) umbilicatus Mont. var. Agathensis Red. Guernsey. 

 T. (Trochocochlea) lineatus DaCosta. Cornwall, &c. 



Not so large as specimens from the Channel Islands. 

 T. (Zizyphinus) Montacuti Wood. Weymouth. 

 T. (Z.) striatus L. Torbay. 

 T. (Z.) exigUUS Pult. Weymouth. 

 T. (Z.) millegranus Phil. Arran, &c. 

 T. (Z.) millegranus Phil. var. pyramidata. Weymouth. 

 T. (Z.) granulatus Born. Isle of Man. 

 T. (Z.) zizyphinus L. Scotland. 

 T. (Z.) zizyphinus L. Anglesea. 

 T. (Z.) zizyphinus L. var. granulifera. No locality. 

 T. (Z.) zizyphinus L. var.? Isle of Man. 

 T. (Z.) zizyphinus L. monstr. Anglesea. 

 T. (Z.) occidental is Migh. Zetland. 



Three specimens, two full grown. 



