132 



SYSTEMATIC ZOOLOGY 



know, and ciliated larvae are produced, which resemble those 

 formed in other groups of the worms. 



CLASS III. BRACHIOPODA 



The Brachiopoda (Gr. /3pax^v, arm, and 7rou?, foot) when 

 examined superficial!}' do not closely resemble the other Mollus- 



v.v. 



d m' 



FlG. 122. Magellania flavescens. A. dorsal aspect of shell; B, from the left side; C. inte- 

 rior of ventral valve; D, ol dorsal valve, ad.m, adductor impressions; b, beak; c.p, car- 

 dinal process; d, deltidium ; d.m, divaricator impressions; d.v, dorsal valve ; /'.foramen: 

 p.m, protractor impressions; s, tooth socket; s./, shelly loop; sp, septum ; /. tooth; v.v, 

 ventral valve. (Aftei Davidson, from Parker and Haswell's Manual.) 



coidea. Their relationship is masked by the presence of a 

 bivalve shell which incloses the body (Fig. 122). Thev are 

 commonly called lamp shells and are confined to the ocean, 

 attached to rocks and similar objects or partially buried in the 

 sand. They live along the shore and at various depths up to 



