Dredging -Excursion to Iceland. 373 



20. Astarte compressa, Mont. Abundant. 



21. borealis, Ch. (arctica, Gray). Rather plentiful, though 



much scarcer than the last. 



22. Tellina cnlcaria, Ch. Young and middle sizes abundant, fine 

 adult specimens scarce. 



23. Mactra solida, L. Scarce. 



24. , var. elUptica, Brown. Similar to the last ; a few more 



of these. 



25. Scrobicularia nitida, Miill. Pretty abundant. 



26. prismatica, Mont. A few amongst the last. 



27. Thraeia truncata, Br. About half a dozen obtained. 



28. Mya truncata, L. Plenty of young, the adults only in odd valves. 



29. Saxicava ritgosa, L. Not common. 



30. , var. arctica, L, A few among the last. 



31. Dentalmm striolatum, St. A few only obtained. 



32. • entails, L., var. mfundihidum, Lee. One dead specimen. 



33. Chiton alhus, L. Rather abundant. 



34. ruber (Lowe), L. Middling plentiful. 



35. marmoreus, Fabricius. Not scarce. 



36. Jlelcion pellucidum, Ij. A few only obtained. 



37. Tectura testudinalis, Miill. Plentiful and fine, my largest 

 measuring about l:j inch (nearly 30 millims.) long. 



38. , var. pcdlida, Verkriizen. Colour white, all but the 



centre or dorsal scar, sometimes exhibiting a clouded wreath of 

 a reddish-brown colour, or other ornamentation, in the inside, with 

 a white margin, and sometimes a plain colouring, hut without th.e 

 longitudinal rays of the typical species. This variety also occurs 

 in Norway ; I am not aware whether it is likewise met with on 

 the north British coasts ; not finding it named, I have proposed 

 the above designation for it. 



39. virginea, Miill. Rather plentiful. 



40. , var. lactea, Jeffreys. A few specimens. 



41. Lepeta cceca, Miill. Not common. Rather a smaU form ; the 

 apex sharp and prominent. 



42. Punctura noachina, L. Only two specimens, and a fragment of 

 a third. 



43. Trochus tumidus, Mont. Rather abundant. 



44. gronlandicus, Ch. Of a fine rose colour, very beautifixl ; 



scarce. 



45. helicinus, Fabr. Only one specimen got. 



46. cinereus, Couthouy, One dead specimen, in good preser- 

 vation. 



47. Ilolleria (Jeffr.) costulata,Mo]l. Rather scarce; mostly dead 

 shells, a few with operculum. 



48. Lacuna divaricata, Fabr. Pretty abundant. 

 49. , var. cancdis, Mont. Similar to last. 



50. Liitorina obtusata, L., var. p)ulliata. Say (:=limata, Loven). 

 Common colours. Plentiful on sea-jjlants on the Eider-Duck 

 Island in the bay. 

 , var. 1, darkest olive (nearly black). Abundant. 



