Oeological Society, 433 



alluded to. Specimens of the Nodosarinse occur ,very rarely in the 

 lowest stratum of the three ; also SpirilUna^ Pulvinulina (of the 

 elegans type), several small individuals of PlanorbaUna Uaidingcri, 

 and vars., and one small MilioJa. 



Of the Ostracoda there are several forms not previously published ; 

 and, for the most part, they differ in the three stages alluded to ; 

 but one Oythere occurs in § i., § ii., and § iii. ; one in § i. and 

 § iii. ; and a Gytlierclla in § ii. and § iii. 



Excepting a general Upper Mesozoic aspect, these limited groups 

 offer no special characteristic so far as yet examined. 



3. " Polyzoa (Bryozoa) found in the Boring at Richmond, Surrey, 

 referred to by Prof. J. W. Judd, F.R.S." By G. R. Vine, Esq. 

 Communicated by Prof. Judd, E.Il.S., Sec. G.S. 



The Bryozoa from the Richmond well, which are in an admirable 

 state of preservation, include no less than 14 diflPerent forms, most 

 of which are characteristic of the Great Oolite of this country and 

 the continent. Two or three forms, however, are new, and detaikd 

 descriptions were given of them in the present paper. Six of the 

 forms foimd at Richmond occur also among the fossils collected by 

 the late Mr. C. Moore from the oolitic rock met with in the boring 

 at Messrs. Meux's Brewery. 



4. " On a new Species of Conoceras from the Llanvirn Beds, 

 Abereiddy, Pembrokeshire." By T. Roberts, B.A., F.G.S., AVood- 

 wardian Museum, Cambridge. 



This new species of Conoceras was obtained by the author from a 

 new quarry about half a mile to the north-west of the Llanvirn 

 quarry, Abereiddy. 



The fossil consists in great part of a mould of the shell, together 

 with a much compressed, obliquely cut, longitudinal section of the 

 shell itself, which can bo removed from its mould. On the posterior 

 part of the fossil the course of the sutures of the septa can be fairly 

 well seen : after passing upwards for a short distance, the sutures 

 bend forward, and, meeting those from the opposite side, which 

 are similarly bent, form a band of superposed chevrons, situated 

 mesially in this part of the fossil. "When the shell is removed from 

 its mould the chevron band appears to be distorted, and is then con- 

 tinued forward as a narrow, partly disconnected groove, to the an- 

 terior margin of the fossil. There is a ridge on the shell itself cor- 

 responding to this groove, which the author considers to be the 

 sii)huncle. 



On the anterior part of the fossil coarse corrugations are present 

 which correspond to the lines of growth of the shell. The bodj'- 

 chamber is not preserved. 



Only 5 species of Conoceras have as yet been described ; the 

 author compared the Llanvirn species with these, and also with a 

 fossil from the Devonian of Nassau, which Kayser referred to Gom- 

 2^hoceras, but which possesses several characters in common with 

 Conoceras. 



