134 
D. Saccus branchialis 8 plicis in utroque latere ornatus: 
*) 16—20 Tentacula: 7. M. exasperatus, Heller. 
**) 20—25 Tentacula: • 8. M. distans, Heller. 
E. Saccus branchialis 9—10 plicis in utroque latere ornatus: 
*) Omnes plicæ sacci branchialis præter pharyngem prominent: 
a) 14—16 Tentacula: 9. M. claudicans, Sav. 
/?) 18—20 Tentacula: 10. M. affinis, Heller. 
**) Tres plicæ infimæ sacci brachialis pharyngem non attingunt: 
11. M. variegatus, Heller. 
Stvela (Savigny). 
Tentacula simplicia. Saccus branchialis 4 plicis in utroque 
latere ornatus. Lamina dorsalis plerumque margine integro, rarius 
aut margine dentato ( S . flava, Herdmann) aut in seriem processuum 
ligulatorum discreto (S. bythia, Herdman). Organa genitalia — 
ovaria utique — in utroque latere, aut modo tubiformia aut ramosa. 
Styela plicata (Lesueur). 
Polycarpa, Heller. 
Tentacula simplicia. Saccus branchialis plicatus, plerumque 4 
plicis in utroque latere ornatus. Magnus numerus organorum geni- 
talium in utroque latere. 
A. Saccus branchialis 3 plicis in dextro, 2 in sinistro latere ornatus: 
P. glomerata, Heller. 
B. Saccus branchialis 4 plicis in utroque latere ornatus: P. sj). pi. 
C. Saccus branchialis 5 plicis in dextro,, 4 in sinistro latere ornatus: 
*) Testa interior crassa, gelatinosa; alterum cornu organi 
vibratilis intro, alterum extrorsum curvatum: 
P. spongiabilis, nov. sp. 
Testa interior tenuis, pellucida; cornu organi vibratilis 
utrumque intro curvatum: P. obtecta, nov. sp. 
