Dr. W. M. Dobie on two new species of Floscularia. 287 
M. Peltier* as identical with his Floscularia ornata. Both Dujar- 
din and Peltier found the rotatory organ five-lobed in the species 
observed in France. Admitting these descriptions to be correct, 
we must either hold with Pritchard that the Ploscularia ornata 
has sometimes five, at other times six lobes, or consider the five- 
lobed species of Peltier and Dujardin} to be a variety of Ehren- 
berg’s true Flos. ornata. 
In no kind of Floscularia ornata has any cornu or process been 
seen attached to any of the lobes. My friend Mr. Hallett, late 
of the Museum of the Royal College of Surgeons, writes me that 
he finds the Flos. ornata with a six-lobed rotatory organ and no 
prccess. 
M. Dujardin {, in describing his family Floscularia, observes as 
follows on the masticatory apparatus of the genus Floscularia :— 
“ The Floscularia has simple mandibles ; in the Stephanoceros the 
mandibles are compound.” With this assertion of Dujardin I 
do not agree ; the whole apparatus closely resembles that of the 
Stephanoceros, only on a smaller scale. One thing I feel certain 
of is, that the tooth is bifurcated and therefore cannot be simple. 
In figure 5 I have endeavoured to represent the dental appa- 
ratus of the Floscularia as I myself have frequently observed it. 
I cannot vouch for its entire accuracy, as it is very difficult to 
obtain a good view of them. 
M. Dujardin § thus observes regarding the eggs: “ Les cufs 
montrent un seul point rouge et non deux comme ceux qu’a re- 
présentés M. Ehrenberg.” I must here also differ from M. Du- 
jardm. In nearly all my examinations of the eggs and young of 
the Floscularia, 1 have been able to make out ¢wo very distinct 
red eye-spots; they appear in the egg when it has reached its 
full size, but are best seen in the young animal. 
Dujardin’s observations || differ from those of Ehrenberg im 
another particular; I again quote from Dujardin’s work : “Ce 
méme auteur (M. Eh.) leur assigne un étui membraneux, mais 
ceux qui ont été observés en France manquent toujours de cet 
étui.” My own observations comeide with Ehrenberg’s descrip- 
tions ; the sheath is never absent except in the very young animal, 
but is often so delicate as to escape superficial observation. 
The two Floscularias described in this communication were 
obtained from a pond situated in Trevalyn in the parish of 
Gresford, Denbighshire, within a few yards of the boundary le 
limiting the detached portion of Flintshire in Gresford. The 
* Annales des Sciences Naturelles, 1838, t. x. p. 40, planche 4. 
t+ Hist. Nat. des Infus. p. 610. 
{ Hist. Nat. des Infus. p. 609, also at p. 611. ‘ Les machoires m’ont 
paru unidentées. ” 
§ Hist. Nat. des Infus. p. 611. || 7b. p. 609. 
