OP CONCHOLOGY, 39 



Lakes or tanks with soft bottoms are rarely met with ; the 

 borders are there generally overgrown with Carices and Sphag- 

 num. Under these circumstances can it be hoped to find mol- 

 lusca? 



I have sometimes thought I had discovered larger bivalves 

 laying on the bottom, and twice succeeded in getting them up, 

 with immense trouble ; but my hopes became disappointed. Once 

 I got at Karmet a bleached piece of an Echinus, another time a 

 valve of Mya truncata Remains of different salt-water animals 

 are often found on the mountains, transported by foxes ; the 

 wind can then easily bring them down to lower situated mountain 

 lakes. The birds may also (on the wing) drop their prey, and 

 foxes run about with mussels, &c. By the entrance of a fox 

 hole called " Ugespilshulen," in the vicinity of Tuliancheab, was 

 found a great number of shells of Tectum testudinalis, Mytilus 

 edulis, and several Buccinum cyaneus. 



" The Greenlanders confirmed my suspicion of the presence in 

 Greenland of larger fresh-water bivalves, telling me that they 

 had seen such in the interior, at some specially-named places. 

 By sacrificing some bread, tobacco, &c, I got two Kajaks (boats 

 of skin, for one man) up to a place where they were said to be in 

 abundance ; but only valves of Mya truncata and Tellina calcarea 

 were brought back. I have often myself found those shells in 

 rivers nearly a Danish mile from the shore." 



EXPLANATION OP THE PLATES. 



PI. 3, fig. 1. Vitrina angelica, B. Greenland. 

 " 2. " beryllina, Pfr. German. 

 " 3. " pellucida, Mull. Denmark. 

 " 4. " angelica, Bk. Greenland ; another draw- 

 ing by Mr. Steenfeld. 

 " 5. Petasia Fabricii, Bk. 

 " 6. Pupa Hoppii, incomplete specimens. 

 « 7. " " var. alba, 



" 8, 9. Adult specimens after pen-drawings by Moller ; 



fig. 8 was considered by Moller the best. 

 " 10. Succinea Cfroenlandica, Bk. 



* Morten Wormskiold (born 1783, died 1845) visited Greenland as 

 naturalist in 1813-14. He afterwards accompanied Capt. Krusenstern 

 on the ship Kusik, on a voyage around the world. He has left several 

 MSS., amoDg which is a list of the animals aud plants of Kamtschatka. 



