Dr edging-Excursion to Iceland. 375 



68. Buccinum undatum, L. Shape similar to British ; spire rather 

 longer in proportion, waves and spiral ribs rather coarse and 

 strongly produced. All of these were dredged in deep water. 



69. , var. planum, Verkr. Shaj^e conical, spire shorter 



than in typical form ; mouth proportionally longer ; whorls flatter ; 

 suture shallow ; waves sHght and disappearing on last whorl, 

 sometimes on the two or thi'ee last ; spiral ribs indistinct, except 

 on intermediate forms ; texture thin and more brittle, plain ; 

 colour a purplish olive-grey, with dark purpHsh-brown throat, 

 the intermediate forms generally of a lighter hue. This variety 

 occurred in one to four feet water at lowest ebb-tide, near the 

 shore ; none of these were dredged in deep water. 



70. Trophon truncatus, Strom. Ilather scarce. 



71. clathratus, L. Similar to the last, though more frequently 



met with. 



72. , var. Gunneri, Lov. This form occurs perhaps the 



most of the three, though all are rather scarce. 



73. Fusus despectus, L., var. tornata, Gould. Only three dredged. 



74. Pleurotoma turricula, Mont. Not common ; fine specimens ; my 

 largest 21 millims. (nearly |- inch) long, and 11 miUims. (nearly 

 I inch) wide. 



75. Trevelyana, Turton. A few only obtained. 



76. jj?/rffm?V?a?«s, Str. More frequent, still rather scarce ; fine 



specimens rare. 



77. violacea, Mighels & C. B. Adams. Young rather plentiful, 



the older ones not frequent. 



78. bicarinata, Couthouy. About half a dozen young shells got, 



mostly dead. 



79. Utricidus Gouldii, Couthouy. Pretty plentiful, though mostly 

 dead shells. 



80. hyalinus, Turton. Only three specimens obtained. 



81. ActcEon tornatilis, L. One young dead specimen. 



82. Philine scahra, Miill. A few specimens only. 



83. Doris hllamellata, L. Four pretty specimens from under a stone 

 at low water. 



Conspicuous by their absence in the places where I dredged 

 and collected were : — Brachiopoda, Pecten (except islandicus)^ 

 Lucina horealisj Cardium edule^ Dentalium entalis and others, 

 Patellavulgata^Littorina littorea^ and other species so frequently 

 met with in Norway and on other northern coasts, though I 

 doubt not but some of them will occur in other parts of Iceland. 



Should any one have a wisli to inspect my Icelandic collec- 

 tion, I shall be happy to show the same on receiving a previous 

 intimation, for the purpose of arranging the time. 



The following circumstance may, I trust, not be without 

 interest to collecting conchologists. One morning the boy I 

 had engaged brought me several PatelJce, which genus I had 

 not met with near Reykjavik, and one thick Purpura lapillus^ 



