WAKSHALl. : ADDiriOiNS TO URITISII CONCHUI.Ol iV. I83 



I have in my mind one shop at least in Guernsey where numbers of 

 Aporrhdis may be seen ornamenting boxes and other fancy articles, 

 which are imported. ' 



A. serresianus Mich. — Dredged at many stations in the 'Porcu- 

 pine' Expedition of 1869— S.W. Ireland, ii3-i8of. ; W. of Ireland, 

 85-1230!. ; Little Minch, 45-50^ ; off Lerwick, io-66f. ; and N. and 

 E. Shetlands, 66-345^ (Jeffreys); Valentia, ii2f (Norman); from 

 Faroe trawlers (Simpson) ! and by the Scottish Fishery Board in the 

 North Sea, 48-76^, and off the Butt of Lewis, 545f (Simpson) ! also 

 Slietland-Faroe Channel, 5i6-57of. ('Triton,') and English Channel 

 358-69of ('Porcupine'). Mr. James Simpson has a specimen which 

 was trawled to the N.E. of Aberdeen in Qof, and my collection con- 

 tains another trawled E. of the Shetlands in 4of.' Most of the 

 specimens from the ' Porcupine ' Expedition were young, in which 

 stage they are very delicate in texture, and bear no resemblance to 

 the adult form. I think Gwyn Jeffreys' record from the 'Little Minch' 

 is almost certainly a mistake. Sowerby's figure represents the fol- 

 lowing variety, and not this. 



var. macandreae JeftV. — Shetland-Faroe Channel 5 yof ('Tri- 

 ton'). Gwyn Jeffreys has redescribed the animal m the ' Lightning ' 

 Report.- In Britain this variety is confined to a very limited area of 

 the Shetland seas. 



Cerithium metula Lov. — Vidlin Voe, E. Shetlands, 2of. Flugga 

 Light, N. Shetlands (Simpson) ! The rows of nodules that ornament 

 this species are not always uniform in size, the upper row occasion- 

 ally being much less developed than the lower two. Authors do not 

 seem to be agreed as to the type-form. Sars' figure is perfect, and is 

 described by him as half-an-inch in length, with 15 whorls ; Forbes 

 and Hanley's are equally good, with one-third-of-an-inch and 12 whorls; 

 while Jeffreys figures an elongated monstrosity, wholly unlike the type, 

 and gives it eight-tenths-of-an-inch and 18-20 whorls. Actual typical 

 specimens will be found to measure four-tenths-of-an-inch and possess 

 14-15 whorls. 



C. reticulatum Da Cos. — This shell varies extremely in size, 

 varicosity, and nodulosity, while the spiral riblets vary in number 

 from three to four. Many named species and varieties have been 

 originated from these peculiarities, some of which occur on our 

 coasts. Gwyn Jeffreys writes that " our shell has never less than 

 four rows " of nodules,^ and his figure exhibits that number ; but 

 his generic figure has three, while some of our largest specimens 



1 since tliesc pages were wrilten my collection of British shells has passed into the hands 

 of J. K. le B. Tomlin, Esq., M.A., of Stoneley, Reading, so that all references herein to my 

 collection should obviously be attributed to Mr. Tomlin >. 



2 Proc. Zool. Soc, June, 18S5, p. 51. 



3 Brit. Conch., vol. iv., p. 260. 



