252 EEPORT— 1882. 



Great Oolite tbat are really passage forms — evolutionary stages — which 

 can neither be claimed as Stomatopora nor Tubulipora, and much less as 

 Diastopora. With the exception of one species, I believe— the P. David- 

 soni, Haime, from the Great Oolite of Hampton Cliffs — all the other 

 types are from the foreign Jurassic areas. I cannot in my material re- 

 cognise P. Davidsoni, but I have drawings of species lent to me from 

 the cabinets of Mr. Longe (Inferior Oolite), Mr. Walford, and Miss 

 Gatty (Great Oolite) — that one would naturally place in this genus. The 

 one type, especially from Mr. Longe's cabinet from the Inferior Oolite of 

 Cleave, near Cheltenham, in some of its chai'acters approaches the 

 P. Jacquuti, Haime, from the Inferior Oolite, Montveaux. There are 

 other characters which would separate them widely. The same may be 

 said of a very beautiful type in the cabinet of Mr. Walford, procured from 

 the base of the Great Oolite. The species are adherent, as Haime de- 

 scribes, and meshes are formed by the inosculation of the branches, but 

 the cell characters and arrangements appear now as Stomatopora, and 

 anon as Idmonea ; and I can well understand the confusion that was 

 painful for Haime to note, when he says, ' The CelUpora, ccJiinata, Gold- 

 fuss, appears to me to be the first fossil known to be referred to the 

 division (Proboscina). Tlie others, principally those of the Crag, have 

 been described as Diastopora or else as Tuhulipora, either by Michelin or 

 by Lonsdale. D'Orbigny has at first shown them under the name of 

 Idmonea, and afterwards that of Prohoscina, originally applied by Audouin 

 in 1826, He criticises Milne-Edwards for having called Criserpia a 

 species, which he, D'Orbigny, confounds with Prohoscina.'^ 



The true Idmonea as an erect Jurassic type I do not know, though 

 we meet with specimens partly adherent and partly erect in the cre- 

 taceous series. In the ' Catalogue of British Fossils,' Professor MottIs gives 

 Idmonea triquetra, Lamx., as found in the Great Oolite, Bradford, and 

 Haime describes the same species in his text, aud figures it (pi. vii. fig. 

 1, a.h). I notice the same Idmonea arrangement of cells as in many 

 undescribed species of Stomatopora (?) at present lying dormant in the 

 cabinets of collectors and students, and it is very ditficult to conceive 

 where these shall be placed in our modern classification, if we destroy the 

 genus Proboscina as a passage group, or get rid of Idmonea other than as 

 an erect type. Busk says ' Zoarium usually erect,' speaking of the 

 fam. Idmoneid^. Hincks, however, gives more latitude in his diagnosis 

 of the genus Idmonea, for he says ' Zoarium erect and ramose, or (rarely) 

 adnate.' Seeing that this latitude exists of partly adnate and partly 

 erect types in the work of one of our greatest systematists, I strongly 

 advise our local students to seek to throw light upon the origin of this 

 unique type of Cyclostomatous Polyzoa. The Idmonea triquetra is at 

 present unknown to me, and I can only point out the lines along which 

 research can be made. 



There is yet another type given by Haime to which I must direct 

 particular attention. This is the Terehellaria of Lamouroux. I have 

 been unable to refer to the original works for a description of the genus, 

 but this has been done for me by George Busk, Esq., F.R.S., to 

 whom 1 am indebted for the following very valuable particulars of the 

 genus and species. 



' Jules Haime, Jurassic Bryozoa, Genus Proboscina. 



