52 Patella ulyssiponensis. Shell length 40.5mm. North Yorkshire. September 2014.

1: elongate auricle of heart.

2: elongate ventricle of heart.

3: part of pericardial sac enclosing heart.

 

Blood reaches the heart from the left through the efferent pallial vessel in the roof (removed in image) of the nuchal cavity containing the head.

 

SPECIES DESCRIPTION part A 2Pu flic.kr/p/BG8mKq

SPECIES DESCRIPTION part B 3Pu flic.kr/p/BRHsiR

Key id. features 4Pu flic.kr/p/BG8hhs

OTHER SPECIES ALBUMS

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

 

Done