29.1 Patella pellucida, growth stage 5h. Length 23.5mm. Embleton, Northumberland, England. March 2018. © P. Lightfoot.

Exceptionally large specimen in holdfast of Laminaria hyperborea thrown up from offshore onto strandline. 10 pence coin, diameter 24.5mm, for scale.

 

Concise Key id. features: 1Pp flic.kr/p/Z4FxDe

Part 1, SHELL FORMS: 2Pp flic.kr/p/Z4FxAi

Part 2, BODY & ANATOMY: 3Pp flic.kr/p/Z4FxtK

Part, 3 HABITS & ECOLOGY: 4Pp flic.kr/p/Z4Fx9M

Sets of OTHER SPECIES: www.flickr.com/photos/56388191@N08/collections/

Done