REMARKABLE MARINE INVERTEBRATA NEW TO THE BRITISH SEAS. 3213 































peduncle is pyramidal, and composed of four triangular lobes, corresponding 
with the four gastrovascular canals. Each lobe is of a tawny-yellow colour, with 
a dark orange centre, and as it is narrow, the four combined, when seen from 
above, appear as a small yellow cross, with an inner cross of orange. From the 
dependant apex of the peduncle hangs a short and narrow colourless stomach. 
the lips of which are produced into bifurcated tentacular processes of no great 
length. , 
Several examples of this animal were taken off Loch Laigh in Mull. 
Hippocrene crucifera. Sp. Nov.—This new form of Hippocrene differs from 
all its congeners in the very long genital lobes springing from the peduncle, and 
running down one-half the length of the canals, so as to remind us of the ovaries 
of the Thaumantias. Jt was taken off Tobermory. 
The umbrella is globular, colourless, and smooth; the subumbrella rather 
large. The four fascicles of tentacular bulbs are each of an oblong and some- 
what crescentic shape, tawny-orange above and colourless below. Each is com- 
posed of six bulbs, bearing black ocelli on their pale portions, and corresponding 
to as many short transparent colourless tentacula. The peduncle is rather short, 
but its lobes, which are of a tawny-yellow colour, with a double line of orange in 
their centres, are very long and narrow, somewhat undulated, and prolonged for 
half the length of the subumbrella, appearing like so many arms. The anal lobes 
are colourless; they are produced into short and proportionally minute labial 
tentacula, each of the four presenting a simple bifurcation. 
Hippocrene simplex. Sp. Nov.—This species is more nearly allied to the H. 
britannica than the others, and connects that well-known form with H. nigriiella, 
_ but is very distinct from both. 
’ The umbrella is globular, colourless, and smooth; the subumbrella large in 
_ proportion. The four fascicles of tentacular bulbs are each oblong, yellow below 
and orange above ; each. is composed of four bulbs, and is acutely four-lobed, 
a bearing four black ocelli on as many projections. Only one yellowish tentacle 
4 H. britannica, is quadrate, massive, four-lobed, and of a dull orange hue. ‘The 
_ stomach is short and wide, terminating in four colourless labial tentacles, which 
_ twice bifurcate. Several specimens were taken at Tobermory. 
*‘Thaumantias undulata. Sp. Nov.—When sailing through the Minch on a 
very warm day, when the sea was very calm, we met with a number of small 
- medusve, each measuring about an inch and a-half in diameter, and conspicuous 
_ in the water, owing to the undulated pink cross which marked their subumbrella. 
On capturing some, they proved to belong to an-undescribed, and very curious 
- form of the genus Thawmantias. 
4 The umbrella is hemispherical, smooth, and colourless. Its margin is fringed 
q with very numerous slender coloured tentacula, which are often carried coiled up 
