[149] _Ascidia_ ----?; perhaps _A. prunum_; but much uncertainty rests
on the names of the _Tunicata_. The species is represented in Plate
XXXIV.: two specimens on the left hand.
[150] _Clavelina lepadiformis._
[151] _Perophora Listeri._ For magnified figures of these animals the
reader is referred to my _Tenby_, Plate V., and _Devonshire Coast_,
Plate XV.
[152] _Cynthia grossularia_; of which a group is depicted in Plate
XXXIV., seated on an old cockle valve, to the right of the foreground.
[153] _Cynthia quadrangularis_, represented in the background of Plate
XXXIV., rising above the cockle shell which supports the Currants.
[154] _Amœrœcium proliferum._
[155] Two familiar kinds of _Botryllus_ are represented in Plate XXXV.;
of which I cannot with certainty indicate the specific names.
[156] _Wanderings in New South Wales_, etc., vol. i.
[157] _Tenby._--The systematic appellations of these four species are
_Halichondria panicea_, _Halichondria rosea_, _Halichondria sanguinea_,
and _Grantia compressa_.
[158] _Grantia coriacea._
[159] _Halina Bucklandi._
[160] _Halichondria incrustans._
[161] _Leuconia nivea._
[162] It is possible that these may be fragments of the longer needles;
but from their bluntly-pointed ends, and general agreement _inter se_,
I do not think so.
[163] _Leuconia Gossei_ (Bowerbank MS.). Dr. Bowerbank, to whom I have
communicated this species, thinks that it may have been confounded by
former observers with the preceding. “The broad specific difference
between them is that _L. nivea_ has _very_ large triradiate spicula
at its surface, and _L. Gossei_ has not, but has in lieu of them very
large acerate ones at right angles to the surface.” (Bowerb. _in litt._)
[164] _Hymeniacidon caruncula._
[165] _Hymeniacidon albescens._
[166] _Pachymatisma Johnstoni._
[167] _Microciona carnosa._
[168] I have been minute in the descriptions of these species,
because the student of marine zoology has so little to aid him in the
identification of our Sponges. This South Devon coast is peculiarly
rich in these productions; and several of these, though common here,
are considered, as Dr. Bowerbank tells me, quite rare. The figures,
which I have drawn from the life with great care, will, I trust, leave
no difficulty in the identification.
Plate XXXVI. is devoted to the above species of Sponges. Beginning
from the upper right corner, we have _Halichondria panicea_, greenish
yellow, with perforated hillocks: it occurs also in other parts of
the picture. The scarlet one next below is _Grantia coriacea_. The
black one to the right is _Halina Bucklandi_. The plump buff one
under the scarlet is _Halichondria incrustans_. Below this is the
contorted _Leuconia nivea_. Then follows, below, and a little to
the left, _Hymeniacidon caruncula_. Below this are two specimens of
_Leuconia Gossei_, and on the left, yellow, with a slender serpent-like
projection, _Hymeniacidon albescens_. Behind this is the grey globular
_Pachymatisma Johnstoni_, and below, to the left, the pale red
_Microciona carnosa_.