vine: classificatioxs of cyclostomatous polyzoa. 351 
one family, Tubuliporina, M. Edwards. Haime, however, did not 
endeavour to give a synoptical arrangement of his groups, and it was 
not until the appearance of Mr. George Busk's Monograph of the 
Fossil Polyzoa of the Crag,''- that any really detailed notice of the 
fossil groups were pubHshed, and then Mr. Busk confined his notice 
more particularly to Recent and Tertiary Polyzoa. It may be well 
to remember that the Crag IMonograph was " originally undertaken 
by the late much-lamented M. Jules Haimes, but he was unable even 
to commence it, before death put an eud to the labours of one whose 
accurate knowledge and practised observation of similar fossil remains, 
would have enabled him to treat the present subject far more satis- 
factorily than it has been in my power to do."t Whether Haime, 
as Mr. Busk suggests, would, or would not have given to the world 
a better monograph of the Crag Polyzoa, is useless to speculate 
about ; but, no doubt, Haine's familiarity with the Jurassic forms, 
would have helped him much in the nomenclature of species — 
especially so, as Mr. Busk admits that he had " formed but an 
imperfect idea of the difficulties attending the investigation and 
accurate discrimination of fossil forms," previous to his labours on 
the Crag species. To this we may owe some of the hesitations on 
the part of Mr. Busk, and in all probability he overlooked the 
structural peculiarities of many of the earlier fossils : and to some 
extent he may have misinterpreted the structural features of 
others. On the whole, however, the S3Tiopsis of the Tubuliporina of 
M. Edwards has been well divided by Mr. Busk ; and generally 
speaking, his Sub-orders have been accepted by leading authorities 
who have made a comparative study of Fossil Polyzoa. It would 
be beside my purpose to refer to, or criticise the divisions of Hagenow 
and Reuss, because it must be admitted that their arrangements, 
previous to the publication of the Crag Polyzoa were very artificial, 
and in his later works, Reuss followed Busk in his arrangements. 
In his introductory observations, Mr. Busk gives the synopsis 
of the Primary Divisions of the Polyzoa, as followed by him, partly 
* 1859. 
f Busk Advert, to crag Polyzoa. 
Since found Recent Catalogue of Cyclos-Busk, p. 29, 1875. 
