OF NORTHUMBERLAND AND DURHAM. 25 



2. B. PUNCTATA, Adams. 



Bidloea punctata, Clark in Zool. Journ. iii. 339. 



In shell sand, with the last, but not so common. Rarely 

 found alive in pools among the rocks within tide marks. 



This species has frequently been confounded with the last, but 

 is perfectly distinct. The characters are accurately pointed out 

 by Mr. Clark in the Zoological Journal. 



3. B, PECTIN ATA, Dilhv. 



Bulla scabra, Mull. Zool. Dan. ii. U, t. 71, f 11, 12. 



Bulla 'pectinata, Dillw. Cat. 481. 



Scaphander catenata, Leach. Moll. (ined.). 



Bullcea angustata, Phil. Moll. Sic. i. 121, t. 7, f 17, b. c. 



Bullcea catenulifera, Macg. Moll. Aberd. 187. 



Bulla dilatata, S. Wood in Charlesw. Mag. Nat. Hist. iii. 

 t. 7, I 3. 



Philine scabra, Loven Ind. Moll. Scand. 9. 



Bulla granulosa, Sars. (sec. Loven). 

 Not uncommon in the Coralline Zone, and frequently found in 

 the stomachs of haddocks, but the shell is seldom cast on shore. 

 It occurs, however, in shell-sand, in the north of Northumber- 

 land. 



We have more than once seen the animal in a fresh state but 

 not alive. It is white, and above twice the size of the shell. 

 The frontal disc is long, and without apparent eyes or tentacles, 

 the sides of the foot broadly reflected, and the cloak, which pro- 

 bably covers the shell in a living state, is withdrawn when dead. 

 The animal bears a great resemblance to that of Bulla lignaria, 

 and the similarity in the form of the shell is also striking. We 

 think it may probably have to be placed with that species in the 

 genus Scaphander of Montfort, but the animals of this tribe re- 

 quire to be more carefully studied, and in the mean time, we pre- 

 fer retaining the name Bullosa, of Lamarck, for these species, 

 rather than making any further changes till the limits of the ge- 

 nera are better understood. The gizzard of Bullcea pectinata 

 has more resemblance to the same organ in B. aperta, than to 

 that of B. lignaria, having three triangular testaceous plates, 

 similar to those of the former, but more slender and pointed. 



