43 Testudinalia testudinalis album. COMPARISON image of Tectura virginea. Shell length 7mm. Oban, Scotland. August 1969.

Tectura virginea for comparison.

1: red-brown V with point near apex of interior.

2: slight threadlike radiating striae.

3: colour faded on dead shell.

4: pattern on central early growth worn away.

5: excentric apex tilted forwards, 18% of shell-length from anterior.

6: anterior profile slightly concave.

7: posterior profile slightly convex.

8: base oval, widest at posterior.

Full SPECIES DESCRIPTION at: flic.kr/p/WadzLk

Key id. features: flic.kr/p/WNjbUS

APPENDIX re range advance/retreat: flic.kr/p/2jW74ig

Sets of OTHER SPECIES:

www.flickr.com/photos/56388191@N08/collections/

 

Done