MM. Kowalevsky and Barrois on Anchinia. 19 
with Doliolum ; in this respect we agree completely with M. 
Grobben * ; but we think that the change that he proposes 
of the name Anchinta into Doliopsis is premature. It would 
be more prudent to, wait for researches upon the form of 
generation which produces the stolon, a form which is still 
absolutely unknown to us; this, however, is a gap which 
we hope will soon be supplied in consequence of the founda- 
tion of a scientific centre at Villafranca. 
EXPLANATION OF PLATES [.-IIL. 
a. Anus. 
b. Mouth. 
br. Branchia. 
e. Large cells of the upper surface 
of the stolon. 
ec, General cavity. 
cell, Large cells of the interior of 
the posterior filament (fig. 9). 
ce. Czecum of the intestine (figs. 
6 and 7). 
el. Lateral part of the cloaca (in- 
ferior wing). 
em. Median part of the cloaca. 
ep. Cavity of the peduncle. 
cs. Superior dilatation of the gene- 
ral cavity. 
ec, Cellular envelope (fig. 9). 
en. Endostyle. 
end, Hndoderm. 
est. Stomach. 
ex. Hctoderm. 
aw. Cisophagus. 
f. Olfactory pit. 
76. Fibrous envelope (fig. 9). 
gc. Nervous ganglion (hollow por- 
tion). 
gn, Nervous ganglion (central por- 
tion). 
z. Intestine. 
/7. Limit of the lateral portion of 
the cloaca. 
im. Limit of the median portion of 
the cloaca. 
Zs. Superior (small) expansion of 
the cloaca, 
iv. Vibratile line. 
m. Cutaneous muscles. 
o. Ovary. 
os. Hxcurrent aperture (fig. 1). 
ov, Ova and ovules. 
p. Point of contact of the median 
portion of the cloaca and the 
pharyngeal sac. 
ph, Pharyngeal sac. 
pr. Heart and pericardium. 
7, Disseminated cells (kidney ?). 
sp. Spiral organ. 
tun. ‘Vunie. 
Fig. 1 (Pl. IL.). Fragment of stolon bearing zooids of different degrees of 
development :—3, corresponding to the bud of figures 2 and 38; 
4, corresponding to the bud of figure 4; 6-7, corresponding to a 
stage intermediate between figs. 6 and 7, and so on, 
to) co} >) 
20 diameters. z 
Enlarged 
Fig. 2 (Pl. 1.). First stage of gemmation, seen from the ventral surface. 
vg. 38, The same stage in profile. 
Fig. 4. A more advanced stage. 
Fig. 5. A still more advanced stage. 
Fig. 6 (P1. IL.). The following stage: the branchial clefts begin to show 
themselves. x 90 diam. 
Fig. 7 (Pl. 1). A more advanced stage: 
the tissues have lost their 
embryonic character; and the creature presents a transparency 
like that of the adult. 
x 46 diam. 
* Loe. cit. p. 73. 
