OF CONCHOLOGY. 37 



L. Pingelii, Beck. T. ovato-elongata ; spira conica, acutius- 

 cula ; anfr. 5 ; sutura profundiori ; apertura dimidio testse longi- 

 tudinis breviori ; rima umbilicali angustiori. L. 6, b'". 



9. Pisidium Steenbuchii, Mbller. Plate 4, fig. 10. 



T. oblique-ovalis, ventricosa, striis increments subtilissimis, 

 sulci incrementi 5 — 6 remoti contasbulati, cinereo-lutescente, 

 intus cinerea ; umbones gibbosi. 



Long. 4 m., alt. 3J m. (Mb'rch). 



T. natalis lenticularis plana lsevigata. 

 Long. 2 m., alt. If m. 



Animal white, foot long and narrow, very extensible ; only 

 one tube, which is very short, scarcely to be seen outside the 

 shell (Mbller). 



Cyclas Steenbuchii, Mbller, Index, p. 20. 

 Pisidium Steenbuchii, Mbrch, Synops. 



" " Temple Prime, Lye. 



" fontincde, Midd. Reise. 



Very rare ; found in a pond in North Greenland, north of 

 Baal's River (Mbller). 



The specimens contain often young, even in half-grown indi- 

 viduals, but somewhat smaller than those of the adult specimens. 



Closely allied to P. pulchellum, Jennyns, but the lines of 

 growth are finer, although the shell is larger. 



Spurious Species. 



1. Limax agrestis, L., Mbrch, Prod. Moll. Groenl., p. 1, No. 1. 



I mentioned this species on account of the following note in 

 Mbller's MSS. : u Limax agrestis was, according to Dr. Beck, 

 seen by Wormskiold in Greenland, in 1813."* According to 

 Beck's MSS., this statement is erroneous, or a mistake of memory 

 for the following species. 



2, Arion fuscus, Mull. 



A specimen taken in a garden in Greenland, probably at God- 

 thaab, was sent to the museum of the Natural History Society 

 about 1836. The specimen is still preserved, but in a very bad 

 condition. It was no doubt introduced with cabbage from Den- 

 mark. 



* I am not able to find the place where Ferussac has named this shell ; 

 it is perhaps in the Diet. Classique, or Bulletin des Sciences. 



