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 



