vine: classifications of cyclostomatous polyzoa. 361 
Tubulipora. 
Fascicularia. 
Supercytis. 
II. — Rectangulata, Waters. Liclienopora. 
Reptocavea. 
Heteropora. 
Crisina. 
Crassohornera. 
As the present papers will form the beginning of a series on 
Jurassic Polyzoa — both British and Foreign — I can only feebly indicate 
the line of inquiry that I shall occcupy in my descriptions. In the 
first place it may be well to notice, that the only Jurassic Monograph 
which we have for reference is that of Haime, which was published 
in the Memoirs of the Geological Society of France in 1854. In this 
work the author described Caen and Ranville examples as well as 
British, and in many cases the British examples fell under the head 
of a type described from a foreign source. There was no objection 
to this, but it frequently happens that the British example differs 
in some few particulars — which will be referred to in the course of 
descriptions — and these minute diff"erences are often very perplexing 
to the young student. Then again I have not been able to trace 
the resting-place of the British type specimens of Haime Many of 
them were supplied to him from private cabinets, but I am unable 
to say whether the whole, or any part of them were placed in any 
English museum. In the second place, there was no public collection 
of the Caen and Ranville fossils to refer to until recently. For some 
time past I have been collating a fine series of Caen Polyzoa for 
the purpose of description, which belongs to the Northampton 
Museum; and as much as possible I shall refer to these specimens in 
the course of my descriptions. Then there is a fine series of British 
examples in the cases of the School of Mines, and some in the British 
Museum. Recently, however, I have been, through the kindness of 
Dr. Pergens, supplied with a really good series of Mesozoic Polyzoa 
from various foreign horizons, and these bear the original names 
given to them by Lamouroux, Goldfuss, Michelin, D'Orbigny, 
