260 REPORT — 1882. 



iecting, forming at the sui'face of the branches circles which ordinarily are 

 not complete, and each of them constitutes one of the turns of a spire 

 many times interrupted. These rings appear more regular when they are 

 distant from each other ; when they are crowded they are often difficult 

 to recoEfnise.' ^ 



■'o 



Spiropora Liassica, Tate. ' Geological Magazine,' 1875. 



This species has been very well described by Professor Tate in the 

 above magazine. I have seen the type specimen, which is in the Museum 

 of Practical Geology. But my own specimens, given to me by Mr. Walford, 

 are different from the types of Tate. The zoarium is more flattened 

 and the cells are longer and more irregular. The type of cell approaches 

 nearer to that of Diastopora stomatopor ides, Yine ('Jour, of Geol. Soc' 

 August, 1881), than that of ordinary Spiropora. 



Localities. — Leptena beds of Moy., King's Sutton. Amm. spinatus 

 beds (Beesley). 



Haime admits eight accredited species, but only three are present in 

 our British area. />'. straminea, Phill. ; S. ccespifosa ; and <S. Bajocevsis. 



Spiropora straminea. 

 Millepora straminea, Phill., ' Geo. of York,' pi. ix. fig. 1. 



This species as figured and described by Phillips in the above work is 

 that ordinarily mot with in fragments. The zoarium is dendroid, variously 

 branched, branches anastomosing so as to form an intricate amalgamation 

 of branches, all of which are of the ordinary size. Zooicia tubular, arranged 

 in series spirally, peristomes circular, slightly raised. 



This species is widely distributed, ranging from the Lower Oolite to 

 the Greensand , and on account of the very peculiar habit of the amalgama- 

 tion of the branches it received from Defranc the name of Intricaria. 

 Blainville gave two species the name of Cricopora, because the cells are 

 arranged in rings. This is the character o? Ceriopora verticillata, Goldfuss, 

 which is given as a synonym of the species by Professor Braun. It has 

 also received the name of Latero-tnbigera from D'Orb., but Professor 

 Braun prefers to adopt the generic name of Entalopliora for the two 

 species described by him as found in the middle Jura of the neighbour- 

 hood of Metz. 



Localities. — Inf. Oolite, Peagrit, Cheltenham. Great Oolite, Scar- 

 borough, Phillips, ' rare in this stratum.' 



Spiropora c^spitosa, Lamouroux. 

 Cricopora, Blainville. Entalophora, Professor Braun. 



This species is distinguished by much thinner and more slender 

 branches. The spiral arrangement of the cells is somewhat similar, but 

 the tufted character is a distinguishing feature. 



Localities. — Inferior Oolite, Base of Oolitic Marl., Nutgrove station. 

 Morris cites Hampton and Bradford. 



' Haime's Jurassic Bryozoa. One passage has been left out respecting ' trans- 

 verse ulaphragms,' which I have not been able to verify. 



