of Edinburgh, Session 1880-81. 
53 
In the “ Mhmoires sur les animaux sans vertebres,” the genus 
Cynthia is broken up into four tribes, viz., Cynthice Simplices , 
Cynthice C desires , Cynthice Styelce , and Cynthice Pandocice. Of 
these the second contains only one species, Cynthia dione , which does 
not belong to this family but to the Molgulid^). Another tribe, 
the Cynthice Pandocice , containing three species, Cynthia mytiligera, 
C. solearis , and C. cinerea , was distinguished from the Cynthice 
Styelce solely by the position of the ovary in the intestinal loop. 
K. Hertwig* has, however, shown that the body which Savigny 
took for the ovary is really merely a fold of the lining membrane. 
The Cynthice Pandocice may therefore be merged in the Cynthice 
Styelce . The remaining two of Savigny’s tribes, the Cynthice 
Simplices , and Cynthice Styelce are natural groups, and as it has 
been necessary to divide them both into genera, should be retained 
as subfamilies which may be called Cynthince and Styelince. 
To these I add a third sub-family, the Boltenince , representing 
the old genus Boltenia , and including, in addition, a new genus, 
Cideolus , and probably also Macleay’s Cystingia. 
The following table shows the arrangement of the sub-families 
and genera of the Cynthiadjs. 
cynthiada;. 
Branchial sac having 
more than four folds 
on each side. Ten- 
tacles compound. 
Body sessile or 
almost so. 
Cynthince. 
Dorsal lamina Dorsal lamina 
having a plain havingthemar- 
margin. In- gin toothed, 
testine form- Intestine form- 
ing a narrow ing a wide 
loop. loop. 
Microcosmus. Cynthia. 
Body borne on the end 
of a long stalk. 
Boltenince. 
Apertures Apertures hav- 
four-lobed. ing less than 
Stigmata four lobes. No 
present. stigmata. 
Boltenia. Culeolus. 
Branchial sac having four 
or less than four folds on 
each side. Tentacles 
simple. 
STYELINcE. 
Genitalia Genitalia 
— simple or — numerous 
lobed tubes, polycarps. 
Styela. Polycarpa. 
* Jenaische Zeitschrift, Bd. viii. p. 96. 
VOL. XI. 
H 
