444 



CHORDATA 



Fig. 407. — Oikot'Icura coplh^-erca (after FoI.V .1. the wlinle animal, removed 

 from its 'house,' ilorsal ^'ie\v; 7^, both', siile \"ie\\' ^\■ith liase of taih a, anus; (". nolo- 

 chord; a', branchial retrfon; d". stomach; cii. endostyle; /", ciliated peripharyngeal bands; 

 ,f, g', brain and lirst ganglion of tail; /;, testis; «/, mouth; i', oi\ ovary; ,■;. gill slits. 





•" ^.^•^''^ 



Fig. 40.S. — Ciiviii iiilr^liiiaUs. A, from the left .side, the cellulose tunic and ilertrial 

 muscular sac remo\ed; I\ from the right side, the tiniic enlireU' reiumed. jihar^'it-K 

 opened from the mouth, u, aiuis; i', cellulose tunic, below «ith adhesive processes; 

 d, cloaca; 1/, rectum; c, atrial opening; cii, endoslvie ending al>o\-e in the peripharyngeal 

 band; .s;, ganglion; //, mouth of Ihc 'hv])ophysis'; lie, heart, with pericardium; ho, 

 branched testes; /.oral opening; /.', gill sac; m, muscular sac; nc, a'so|ihagus; ml, ovi- 

 duct, the black line beside it the vas deferens; ov, ovar}-; s, partition between atriurii 

 and body cavity; si, stomach; /, crown of tentacles. 



