434 Mr. T, C.Ey ton's Account of a Dredging Expedition abode, exercise a more or less fatal influence upon the life of the animal in which they live. The experiments commenced on the Echinococcus veterinorum are sufficiently advanced to enable us to declare that this cystoid worm also belongs to a Tcenia. A quantity of these destructive worms given to some young dogs, showed at the end of a few days myriads of exceedingly delicate Tsenias, which already ad-hered to the mucous membrane of the small intestine by their four suckers and their crown of hooks. All these Tsenias only possessed as yet three divisions in the body — one for the head and neck, a small joint behind this, and lastly a long segment. In these two joints the sexual organs had commenced their de-velopment ; but this was not sufficiently advanced to enable one to be certain that these little Tsenias were adult, or to determine the species. I am continuing the experiment and hope soon to be able to publish the result. XLIV. — Some Account of a Dredging Expedition off the coast of the Isle of Man during the months of May, June, July and August 1852. By T. C. Eyton, Esq., F.L.S., F.Z.S. [Continued from p. 285.] The following is a list of Echinodermata taken with the dredge and on shore : — Ophiura texturata. Dredged off Maughold Head : not very plentiful. Ophiocoma neglecta. Under stones and roots of Laminaria off Derby Castle at low water mark. granulata. Dredged off Laxey in abundance. rosula. Very common. bellis. Dredged off Laxey in 16 fathoms water. Uraster glacialis. Not very common round the island. rubens. Common. Cribella oculata. Common in from 10 to 20 fathoms water, but not so much so as in from 5 to 10 fathoms, or as on the Welsh coast. Solaster endeca. Dredged off Maughold Head and Laxey, but not very common. papposa. Common. Palmipes membranaceus. I took only three specimens, one off Douglas Head and two off Laxey Head. Asturina gibbosa. Only once found in a cavity of the rock opposite Derby Castle. Asterias aurantiaca. Several specimens were dredged up, but it does^not appear to be very abundant.
BioStor
