PLATE XXI. 



Figs. 1-4. Circalia stephanoma, u. sp. (p. 198). 



Fig. 1. The entire monogastric corm, drawn from life, p, Pneumatophore ; pf, pneumatocyst ; pp, pigment- 

 cap ; pi, pneumatochone ; n, corona of eight nectophores ; v, velum ; gh, male gonodendron; gf, 

 female gonodendron ; q, palpons ; r, palpacles ; t, tentacle; g, siphon; sh, liver-ridges; $r, proboscis; 

 ss, suctorial mouth. 



Fig. 2. Apical view of the half corm. Characters as in fig. 1. 



Fig. 3. Basal view of the half corm. ss, Suctorial mouth ; It, androphores ; /, gynophores. 



Fig. 4. Horizontal section through the pneumatophore. pf, Cavity of the pneumatocyst ; pq, radial pouches 

 of the pneumatophore ; pr, radial septa between the pouches. 



Figs. 5-8. Athoria larvalis, n. sp. (p. 202). 



Fig. 5. The entire monogastric conn, drawn from life, p, Pneumatophore ; b, corona of bracts ; q, palpons ; 

 r, palpacles ; /, tentacle ; s, siphon ; ss, suctorial disc of the mouth. 



Fig. 6. Vertical frontal section through the axis of the corm (semi-diagrammatic), p, Pneumatophore;^)/, 

 pneumatocyst ; pc, pericystic cavity ; pi, pneumatochone ; at, cavity of the trunk ; h, bracts ; be, 

 bracteal canal ; bs, rudimentary nectosac of the bract ; a; its radial canals ; k, cnidonodes on its 

 mouth; q, palpon; r, palpacle; h, androphores; /, gynophores; t, tentacle; ts, tentilla; d>, basi- 

 gaster; sni, stomach; so, its hepatic villi; sr, proboscis; ss, suctorial mouth. 



Fig. 7. A single bract, be, Bracteal canal ; bs, subumbrella ; k, cnidonodes on its mouth. 



Fig. 8. A single tentillum. ts, Pedicle ; tk, spiral cnidoband ; tf, terminal filament. 



Figs. 9-13. Larvae Physonectarum (pp. 195, 200). 

 pig. 9. Larva with a single bract (b). p, Pneumatophore; g, siphon ; .so, mouth ; t, tentacle ; i, buds. 

 Fig. 10. Larva with two opposite five-edged bracts (b). Characters as in fig. 9. bs, Nectosac. 

 Fig. 11. Larva with four cruciate trifid bracts (b) seen from the apex, p, Pneumatophore ; i, buds ; k, cnidonodes. 

 Fig. 1 2. Larva with a corona of five-edged bracts (b). Characters as in figs. 9, 1 0. 

 Fig. 13. Eudimentary tentillum. fs, Pedicle ; tk, cnidosacs. 



