REMARKABLE MARINE INVERTEBRATA NEW TO THE BRITISH SEAS. 309 
7 Gsophagus elongated, situated on the left side. Stomach cubical, spongy, or 
. glandular. Intestinal loop large and open, reaching to the bottom of the muscu- 
lar tunic; its ascending portion glandular, probably hepatic; the rectum passes 
: from the ventral to the right side of the cesophagus; the anus is on the dorsal 
edge of the sac about its middle. The ovary is in the loop of the intestine, but 
was not in season in the specimens taken. 
Testis white, ramifying on the surface of the ovary: the vas deferens runs up 
on the cesophagus and rectum to the side of the anus. The heart is in the loop 
of the intestine and ovary. 
Sp. Syntethys hebridicus—All the specimens were dredged in thirty fathoms 
water, close to Croulin Island, near Applecross. The locality in which they 
occurred is remarkable for the assemblage of boreal mollusca there congregated, 
so that we may reasonably expect that this extraordinary ascidian will be found 
hereafter in the Norwegian seas. It is probably a member of the boreal type of 
the British fauna. 
Holothuria intestinalis. Ascan.and RatuHKe.—From a depth of thirty fathoms 
in the Minch, and from the same depth off Croulin Island, we dredged a twenty- 
tentaculated Holothuria, undescribed as a member of the British fauna. It has 
an elongated cylindrical body of a pinkish-grey colour, and very soft in texture 
of skin. The tentacula are short and orbicular, compactly frondose, and of a 
dark orange colour. The surface of the body is thickly covered with slender 
suckers, dilated at their bases, and rather more numerous on the ventral than on 
the dorsal aspect. By means of these suckers, the animal invests itself with 
fragments of shells and stones in the manner of Thyone. It grows to the length of 
half a foot. Judging from the description given in the “ Ofversigt af Skandina- 
viens Echinodermer,” by Dusen and Koren, this appears to be the Holothuria 
intestinalis of Ascantus and RatuKn, H. mollis of Sars. We have not been able 
to compare it with the original figures. It constitutes a second British species of 
Holothuria proper ; the first being the animal described by Mr Peacu, under the 
name of “ Nigger,” given to it by the Cornish fishermen. 
Sarcodictyon agglomerata. Sp.nov.—Examples of a new species of this curious 
_ genus of Asteroid zoophytes were dredged in thirty fathoms water off Croulin 
Island, and also between Rasa and Scalpa. 
Like its congener the Sarcodictyon catenata, it invests the surface of stones 
and shells, and is also found adhering to corallines. It differs essentially, how- 
ever, in having the polype cells, instead of being arranged in single file, grouped 
together in assemblages of from three to five. each group connected with its 
neighbour by a stolon-like extension of the polypidom. The texture of its surface 
is not so smooth, and the colour invariably ochraceous yellow. The polypes are 
white, and exactly resemble those of Swrcodictyon catenata. Each polype cell 
Measures about two-tenths of an inch across. 


























