430 Mr. W. Thompson's Additions to the Fauna of Ireland. 32. Distoma *. Small intestine pf pochard {Fuligula ferina). * In the month of January 1839 I found a large number of an ap-parently undescribed species of Distoma in the small intestine of the pochard {Fuligula ferina); when recent they were subrotund, but (after having lain in water for twenty-four hours) they became nearly flat on being placed in spirits ; colour reddish at first, afterwards dirty white ; head subreniforrn, unarmed ; neck (or that part between the pores) generally curved, the concavity upon the abdominal surface forming a channel at this place. Both extremities atteni:^ated. Pores orbicular, seated near each other ; anterior very small and terminal ; ventral much larger, cup-shaped and prominent. Between the an-terior and ventral pore, close to the ventral, a lemniscus is some-times seen to project. [To be continued.] XLVIIL — Additions to the Fauna of Ireland. By William Thompson, Pres. N^t. Hist, and Phil. Society of Belfast. MOLLUSCA. Class Gasteropoda. Order Nudibranchiata. Doris repanda, Alder and Hancock, Annals Nat. Hist. vol. ix. p. 32. A specimen of this Doris was found between tide-marks at Round-stone, county Galway, in July 1840 : R. Ball, E. Forbes, W. T. Doris aspera, Aid. and Hanc, Ann. Nat. Hist. ix. 32. Very young examples of a Doris, and most probably (according to Mr. Alder) of this species, were obtained at Glandore bay, county of Cork, by Dr. George J. AUman in the month of August 1842. Mr. Alder himself procured specimens of D. aspera during an excursion in September last with Dr. Farran of Dublin to Malahide, on the coast of the county of Dublin*. Goniodoris nodosa, Mont, (sp.) ; Doris nodosa, Mont., Linn. Trans, vol. ix. p. 107. t. 7. f. 2. Twelve specimens of G. nodosa occurred on a plant of Fucus vesiculosus dredged in Killery bay, county of Galway, in July 1840 : R. Ball, E. Forbes, G. C. Hyndman, W. T. Mr. Alder found the species to be plentiful at Malahide in Sep-tember last. Polycera ocellata, Aid. and Hanc, Ann. Nat. Hist. vol. ix. p. 33. Mr. Alder, by means of the dredge, took this species commonly and of all sizes in Dublin bay in August last, and subsequently ob-tained a specimen at Malahide. Polycera citrina, Alder, Ann. Nat. Hist. vol. vi. p. 340. pi. 9. f. 7 — 9. * The new species oi Mollusea Nudibranchia obtained on this occasion are described by Messrs. Alder an4 tJancpck at p. 161 of the present volume.
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