SEA MUSSEL MYTILUS EDULIS. 



153 



AJLV 



HV 



EBV 



—APV 



134 



Ftc. 134. — Interior view of right mantle with veins injected with Berlin blue gelatin mass. Left mantle lobe with part of 

 visceral organs has been removed and right branchial lamellae reflected to expose external plicate canals and connecting veins. 

 ALV, anterior longitudinal vein; AnV, anastomosing vein; API', ascending palUal veins; Br, gills; EBV, efferent branchial 

 vein; EPIC, external plicate canals; HV, horizontal vein; M, mantle; MS, marginal sinus; PLV, posterior longitudinal vein. 



DLP ,rr D ^ r r J BV PIC IMS K PAd 



VLP j LLS \ ABV J \GC] LpC i 



iith— A 



vlp j ms i 



AAd ARet Ft 



ByS 



MS Mes: RA 

 135 W 



ABV AnV 



EBV 



Fig. 135- — Interior view of mantle cavity of an injected mussel with left branchial lamella? reflected to expose foot and meso- 

 soma. AAd, anterior adductor muscle; ABV, afferent branchial vein; ARet, anterior retractor muscles; ByS, byssus stalk; 

 DLP, dorsal labial palp; Ft, foot; GC, genital canal; IMS, intermuscular sinus; IPIC, internal plicate canals; A", kidney; L, 

 liver; LLS, left lateral sinus; LtC. lateral cavity; Mes, mesosoma. Mth, mouth; MY, mesosomal vein; PAd, posterior ad- 

 ductor muscle; R\ , recurrent artery; VLP, ventral labial palp; other abbreviations same as in f g. 134. 



