1898-1902. No. 20.] BRACH10PODS AND MOLLUSCS. 21 



coasts, we find the largest and best developed individuals within the 

 fiords. Dr. APPELLOF for instance has found a specimen in the Oster- 

 fjord measuring: Long. 28 mm., and Lat. 16 mm., while I have taken 

 a specimen at Vik in Sogn measuring respectively 32 mm. and 15 mm. 

 whereas among the skerries and islands outside Bergen I have not 

 found a single specimen with a length over 18 mm. 



The sculpture, margin-zone and radula correspond almost exactly 

 with what one finds in specimens from the Norwegian coast. The 

 colour varies even in specimens from the same locality between dark- 

 red with a few light dots and lines and light-red with numerous light 

 dots and lines. 



Trachydermon albus, LINNE. 



Locality: 



March 7. 1900. Bay south of Sjopolse Ness, Havnefjord, 30-40 m. Small stones 



slightly overgrown with laminaria. 



July 22. The winter harbour, Havnefjord, about 60 m. Small stones. 



Aug. 4. Blaeksprutgrunden, Havnefjord, 2040 m. Small stones. 



Aug. 4. Sjopolse Ness, 3050 m. Small stones. 



June 29. 1901. Off the camping ground, Jainmerbugten. 



July 19. 1902. Off the camping ground, North Devon, 6-14 m. Small stones. 



At Sjopolse Ness 5 specimens were obtained; at each of the other 

 localities only one. 



The largest specimen measures: Long. 15 mm., Lat. 8 mm. The 

 breadth of the margin-zone is 0.75 mm. This species attains a size of 

 16.5 mm. (Hlco) at Spitzbergen and of up to 17 mm. (SPARRE SCHNEIDER) 

 on the Norwegian coast. So far as I have been able to discover after 

 carefully examining two specimens the sculpture, margin-zone and radula 

 agree in every way with what we find in Norwegian specimens. 



Gastropoda. 



Acmaea testudinalis, 0. F. MULLER. 



Locality: 



July 29. 1898. Egedesminde. Common. 



July 30. Godhavn, 6 m. 4 specimens. 



Aug. 5. Upernivik, 8 26 m. 3 specimens. 



The largest specimen has a basal diameter of 25 mm. 



