292 BULLID^E. 



hard gizzard, and that it was probably a coriaceous one ; if so, 

 I am wrong, as in the only live specimen I have since met 

 with, I saw it, though it is so minute as to be little more than 

 a pin's point ; it appeared to have the aspect of a denticulated 

 yellow lingual riband, doubled up in two faces on a minute 

 cylinder : I could not detect the third plate ; but as I removed 

 the mass from the stomach, not the head, and from its com- 

 plete similarity externally with its congener, I cannot doubt 

 that the usual trifid gizzard of the race exists. The mouth is 

 as in the B. catena, and the part of the upper disk imme- 

 diately above it escapes from the general cloud colour in being 

 white. This animal inhabits with the B. catena, but is a 

 smaller species, and very free in showing the organs that are 

 visible. I have omitted to say that the eyes and tentacula 

 are altogether wanting. Long. -fa, lat. et alt. -^ unciae. 



B. PRUINOSA, Clark. 



B. pruinosa, Zool. Journ. iii. p. 339. 



Philine pruinosa, Brit. Moll. iii. p. 549, pi. 114. F. f. 1, 2. 



This species was discovered by us twenty years ago, but, 

 though sedulously looked for, we have not seen it since, and 

 can only refer to our original account of it in the ( Zoological 

 Journal/ ^ 



The following, which are Bulltece with us, we have not seen 

 alive : 



B. QUADRATA, S. Wood et nobis. 

 Philine quadrata, Brit. Moll. iii. p. 541, pi. 114. E. f. 2, 3. 



B. SCABRA, Miiller. 



Philine scabra, Brit. Moll. iii. p. 543, pi. 114. E. f. 4, 5 ; (animal) 

 pi. V.V. f. 1. 



The species not particularly enumerated above will now be 

 mentioned. The Bulla lignaria has frequently been received 

 fresh, though not alive, from the Plymouth grounds; the 

 animal does not differ anatomically from the four we have 

 described. The B. Cranchii has been sparingly obtained in 



