12 Crepidula fornicata

12 Crepidula fornicata

Long, black penis (1) arising from base of right cephalic tentacle; used to reach pallial oviduct of female lower in stack. Mantle (2) roofs the large mantle cavity containing the large black ctenidium (3). Side of pedal retractor muscle (4) which connects to septum.  L. 38 mm. Portland Harbour. April 2012.