| OCR Text |
Show 834 MR. E. T. BROWNE ON BRITISH MEDUSAE. [Nov. 16, peduncle and the stomach; mouth with four lips. The stomach and mouth of a delicate pinkish colour. Eight radial canals lead from the stomach, along the peduncle and down the sub-umbrella, to the ring-canal. Upon each radial canal, at the summit of the umbrella-cavity and close to the peduncle, the gonad originates, first as a small oval swelling and at a later stage hangs freely down in the umbrella-cavity. Tbe margin of the umbrella is lined with tentacles, about 80 present, colourless when fully expanded, but slightly reddish when contracted. On the inner side of the ring-canal, near the velum, the marginal vesicles are situated, eight in number, alternating, about midway, with the radial canals. The velum is broad. An abnormal specimen was taken on 25th April, 1895. It had seven radial canals, seven gonads, and seven marginal vesicles. DISTRIBUTION. Heligoland, Hartlaub. SCOTLAND-Shetland Islands, Forbes; St. Andrews, M'Intosh, Crawford. IRELAND-Valencia Island, E. T. B. BIBLIOGRAPHY. AGASSIZ, A. 1865. North American Acalephae. (Cambridge, Mass.) AGASSIZ, L. T862. Contrib. Nat. Hist. U.S.A., vol. iv. (Boston.) ALLMAN, G. J. 1867. " On Slabberia." Brit. Assoc Bep. p. 77. ALLMAN, G. J. 1871-72. Monogr. Gymu. Hydroids. Bay Soc. (London.) ALLMAN, G. J. 1873. " On some Becent Besults with the towing-net on the South Coast of Ireland."- Nature, vol. ix. pp. 73-74. BROOKS, AV. K. 1895. " The Sensory Clubs or Cordyli of Laodice." Journ. Morph. vol. x. pp. 287-304, pl. xvii. (Boston.) B R O W N E , E. T. 1896. "On British Hydroids and Medusa?." Proc. Zool. Soc. pp. 459-500, pis. xvi. & xvii. (Loudou.) CLAUS, C. 1881. "Ueber JEquorea forskalea:' Arbeit. Zool. Instit. Wien, Bd. iii. CRAWFORD, J. H. 1891. "Notes on Medusaa of St. Andrews Bay." Ann. Nat. Hist. ser. 6, vol. viii. pp. 295-297. FORBES, E. 1818. Brit. Naked-eyed Medusae. Bay Soc. FORBES, E. 1851. " On JEquorea." Proc. Zool. Soc. pp. 272-275, Bad. pl. iv. (Loudon.) GEGENBAUR, C. 1856. "Versuch Syst. Medusen." Zeitschr. wiss. Zool., Bd. viii. pp. 202-273, Taf. vii.-x. H A D D O N , A. C. 1885. " On the Fauna of Dublin Bay." Proc. Boy. Irish Acad. ser. 2, vol. iv. pp. 523-531. (Dublin.) HAECKEL, E. 1864. "Beschr. Medusen Golfe von Nizza." Jena. Zeitsch. Naturw., Bd. i. pp. 325-342. HAECKEL, E. 1879. Das System der Medusen. (Jena.) HARTLAUB, C. 1894. " Coelenteraten Helgolands." Arbeiten biol. Anstalt Helgoland (1893), Bd. i. pp. 161-206. (Kiel.) |
