REPOKT ON THE TIJNICATA. 
403 
feature in tlie present species is the shape of the stigmata. They are perfectly straight 
(PL XL VII. fig. 2, sg.), and in this respect differ from those of the other Molgulidse. 
The only approach to this extraordinary condition is what is seen in the branchial 
sacs of Ascopera pedunculata and of Molgula pedunculata, where the stigmata are 
sometimes straight and sometimes curved.^ They are never, however, arranged in 
regular transverse rows as they are in the case of the present species (PI. XL VII. 
fig. 2, sg.). This structure of the branchial sac seen in Molgula carpenteri is exactly 
like that of most species of the Cynthiidse, and in this respect the present species and 
Ascopera pedunculata form a perfect transition from the typical Cynthiid to the typical 
Molgulid condition. Molgula carpenteri is, however, notwithstanding its straight and 
regularly arranged stigmata, an undoubted Molgula. The other organs of the body have 
aU the characteristics of the Molguhdse, and the fact that an approach to the straight 
condition of the stigmata is found in Molgida pedunculcda prevents the new species 
being raised to generic rank. 
Family Cynthiid^. 
Most of the species described in this Appendix belong to this, the largest family 
of the Simple Ascidians, and the three subfamilies, the Bolteninse, the Cynthinm, and 
the Styelinm, which were formed in the First Part of this Eeport, are all represented. 
Subfamily 1. Boltenin^. 
This group of the Cynthiidae is represented by a new species of the remarkable deep- 
sea genus Culeolus. I have named it in memory of Dr. R. von Willemoes-Suhm, who 
was the first naturalist to examine a species of the genus [Culeolus perlatus,^ Suhm). 
Culeolus willemoesi, n. sp. (PI. XLVIII. figs. 1-4). 
External Appearance. — The body is fusiform in shape, and the peduncle is very long 
and slender. The widest part is about the middle of the body, and both the ends taper 
to narrow points. The anterior end passes gradually into the peduncle. The dorsal edge 
is rather more convex than the ventral. The two sides are about equally rounded. 
The peduncle is slight, but moderately tough. It springs from the anterior end of 
the body immediately on the ventral side of the branchial aperture, and it runs at first 
anteriorly and then turns dorsally and posteriorly, and then goes straight to its base of 
attachment. The apertures are both conspicuous. The branchial is placed close to the 
1 See Part I. of this Report, pp. 65 and 74. ^ ggg pg,rt I. of this Report, p. 115. 
