72 CONKLIN — EMBRYOLOGY OF A BRACHIOPOD. [April 4, 



Mueller, F. ('6i). Die Brachiopodenlarve von St. Catharina, Zweiter Beitrag. 



Archiv filr Naturgesch. 

 Shipley, Arthur E. ('83). On the Structure and Development of Argiope. 



Mittheil. ZooL Stat. Neapel, Bd. 4. 

 Van Bemmelen, J. F. ('83). Untersuchungen liber den anatomischen und his- 



tologischen Bau der Brachiopoda Testicardines. Jenaische Zeit. f. Natur- 



wiss, Bd. 16. 

 Wilson, E. B. ('99;. Cell Lineage and Ancestral Reminiscence. IVcods Noll 



Biological Lectures for 1898. 



Reference Letters. 



Be, Blastoccel. 



Bf, Blastopore groove. 



Bp, Blastopore. 



Br, Blastopore remnant. 



C, Coelom. 



Ce, Enteroccel. 



Cc, Cephalic Coelom. 



Cm, Mantle Coelom. 



Cp, Peduncular Coelom. 



Cent, Cephalic and Mantle Coelom. 



Cmd, Dorsal extension of Mantle Coelom. 



Cmv, Ventral extension of Mantle Coelom. 



CG, Apical Sense Plate and Cerebral Ganglion. 



D, Dorsal. 



DA, Dorsal-Anterior. 



E, Enteron. 



Em, Egg Membrane (ectoplasmic layer). 



Fa, Anterior Mantle Furrow. 



Fp, Posterior Mantle Furrow. 



Gc, Gastrocoel. 



M, Mantle. 



iMd, Dorsal Mantle Fold. 



Mv, Ventral Mantle Fold. 



mc, Mesenchyme. 



O, Point where blastopore closed and oesophageal invagination appears. 



P, Peduncle. 



Pb, Polar Bodies. 



PC, Peduncular Chamber. 



Pg, Dark Staining Granules. 



SG, Ventral Sense Plate and Sub-oesophageal Ganglion. 



SS, Setae Sacs. 



V, Ventral. 



VP, Ventral-Posterior. 



