488 



Forty-fifth Report on the State Mtjsevm. 



scars is very simple compared with that found in some of the 

 inarticulate genera (Lingula, Disciaisca), but among the fossil 



Fig 82.— Muscular system of Magellania australis. a, mouth; 6, adductors; c, diductors: 

 d, ventral pedicle muscles; e, accessory diductors; /, median pedicle muscle; g, dorsal pedicle 

 muscle. (Woodward.) 



species of such genera the muscular impressions are rarely 

 retained with distinctness. For the fuller elucidation of this 



Fig. 88.— Interior of the pedicle-valve of Athyris Fio. 84.— Internal cast of the pedicle-valve of 

 apiriferoides; showing adductor and diductor Meristella nasuta; X, filling of rostral 

 scars cavity; t, position of teeth. 



subject the student is referred to the chapter <m the Mrs- 

 cular System. 



40 



