III ASCIDIAE SIMPLICES—-CYNTHIIDAE 75 
Sub-Fam. 2. Cynthiinae— More than eight folds in branchial 
sac (Fig. 36, A); tentacles compound (Fig. 37, B); body sessile 
or with a short stalk (Fig. 
Soyer). The chief genus 
is Cynthia, Savigny, with 
a large number of species, 
some of which are British. 
Rhabdocynthia has echin- 
ated calcareous spicules in 
the mantle (see Fig. 50, D, 
p. 87). Fic. 37.—Tentacles of Cynthiidae. A, Simple, in 
Rorbesella. tessellata isa Styelinae ; B, Compound, in Cynthiinae. 
remarkable British species, having the test marked out into plates 
(Fig. 39, B). It is intermediate in some characters between 
Styelinae and Cynthiinae. 
Sub-Fam. 3. Bolteninae—More than eight folds in branchial 
sac; tentacles compound; body pedunculated (Fig. 38, A). The 
chief genera are—ZSoltenia, Savigny, with the branchial aperture 
Fic. 38.—Culeolus wyville-thomsoni, Herdman. A, from left side (half-nat. size); B, 
part of branchial sac. At, Atrial aperture ; Br, branchial aperture ; br7, branchial 
fold ; 7.7, internal bar ; sp, spicules ; ¢7, transverse vessel. (After Herdman.) 
four-lobed, and the stigmata normal; and Culeolus, Herdman 
(Fig. 88), with branchial aperture having less than four lobes, 
and the stigmata absent or modified (Fig. 38, B), the branchial 
sac showing a wide mesh-work of vessels stiffened by branched 
calcareous spicules. Culeolus is a deep-sea genus discovered by the 
