234 Miscellaneous. Mactra subtruncata, Da Costa. \ Donax anatinus. Lam. Syndosmya alba. Wood. prismatica, Mont. solida, Linn. Lutraria elliptica, Lam. oblonga, Chem. Tellina donacina, Linn. incarnata, Linn. tenuis, Da Costa. crassa. Pennant. fabula, Gronovius. pygmeea, Phil. Psammobia tellinella. Lam. Ceratisolen Legumen, Linn. Solen Siliqua, Linn. Ensis, Linn. marginatus, Pulteney. pellucidus. Pennant. Corbula nucleus, Lam. Saxicava arctica, Linn. Thracia phaseolina. Lam. Ferroensis, Chem. \ Pandora obtusa, Leach. Number of Species : — Cephalopoda 2 Gasteropoda 78 Lamellibranchiata . 72 Total .... 152 The part explored was very limited in extent and range of depth, nowhere exceeding 1 5 to 1 6 fathoms, which accounts for so many fewer species being obtained than in Vigo Bay. Had our researches extended to the inlet forming the harbour of Ferrol, it is probable that we should have been much more successful. Of the species enumerated, only fifteen species of Gasteropoda and four of Lamellibranchiata are not known inhabitants of the British seas, including the Channel Islands. The genera Ringicula, Mitra, Solarium, Solemya, and the species Cyprcea candidula, Scalaria crenata, Dentalium dentate. Auricula Firminii, Chiton fulvus, Cardium ciliare, and Lucina digitalis are supposed to reach the northern limit of their range in the neighbour-hood of Corunna, and are not found further east in Asturias. The genus Cassis and species Murex Edwardsii, Purpura hcema-stoma, Mangelia elegans, and Lucina pecten have been obtained on the coast of Asturias, and find their respective limits northward on the Spanish or French shores of the Bay of Biscay. Lacuna puteolus is the only northern form which reaches its southern hmit of range in the neighbourhood of Corunna. Of the most characteristic forms in Vigo Bay — viz. Chiton fulvus, Ringicula auriculata, Turritella triplicata, Nassa trifasciata, Fusus contrarius, and Mactra rugosa — only the first two were obtained at Corunna. On Arachnactis brachiolata, a Natatory Actinia, discovered near Nahant, Massachusetts. By Alexander Agassiz. The Zoophyte described by Mr. A. Agassiz is a near relative of the Arachnactis described by Sars in his * Fauna Littoralis Norvegise.' Mr. Agassiz insists particularly upon the bilateral structure of this type, which is nearly as striking as that of Philomedusa and Hal-cmnpa. The mouth is excentric, and elongated into a fissure. The
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