VIII 



TRANSVERSE SECTIONS 



405 



ret 



ret 



FIG. 103. Anodonta. Three transverse sections (x ij). A, through the anterior 

 part of the visceral mass. B, through the posterior part of the visceral mass. 



LHttt <J1 LHC VlSLCldl HIU33. JJ, LlllUUgll IHC pUStClUJl petit 



C, through the posterior adductor muscle. 

 IM. auricle ; &/. urinary bladder ; #/. gl. external gill-lami 

 inter-lamellar junction ; int. intestine ; int. gl. internal gill 

 k. o. pericardial gland ; Ig. ligament ; m. mantle ; p. ad. 



ina ; //. foot ; t. /. j. 



ter-iamenar junction ; mi. miesime ; im. gi. internal gui-lamina ; kd. kidney ; 



o. pericardial gland ; Ig. ligament ; m. mantle ; p. ad. posterior adductor ; 

 pc. pericardium ; ret. rectum ; s. br. c. supra-branchial chamber ; sh. shell ; ty. 

 typhlosole ; v. ventricle ; v. c. vena cava ; v. gn. visceral ganglion ; v. m. visceral 

 mass. (From Parker and Haswell's Zoology, after Howes, slightly altered.) 



PRACT. ZOOL. 



D D 



