1897] SOME NEW BOOKS 203 
idae for suborders and tnae for families. The alteration in this way 
of an already uniform and established system of nomenclature seems 
to us quite unjustifiable. 
In the classification of the Protozoa we notice a certain number of 
new names, some of which are coined for the purposes of new classi- 
fications, while others are older groups renamed. The Sporozoa are 
divided into two subclasses (1) Amoebogeniae (nov.) with amoeboid 
sporozoites, and containing the Myxosporidia, and (2) Rhabdogeniae 
(nov.), with sporozoites of definite form, including the remainder of 
the class. The Rhabdogeniae are further divided into the two orders, 
Dolichocystida (nov.), comprising the Sarcosporidia, and Brachycystida 
(nov.), which includes the remaining forms, namely, the Gregarinidae, 
Coccidiudae, Haemosporididae(Drepanidiwm, ete.)and Gymnosporididae 
(Haemamoeba and others). In the Ciliata Stein’s four orders are 
maintained. The Holotricha are divided into Gymnostomidae, cor- 
responding to Biitschli’s Gymnostoma, and the Hymenostomidae 
(nov.), corresponding to Biitschli’s Trichostoma Aspirotricha. |The 
Peritricha are divided into Scaiotrichidae (nov.), comprising Biitschli’s 
Licnophorina and Spirochonina, and Dexiotrichidae (nov.) = Vorticel- 
lina. In the former the adoral zone of cilia has a sinistral (Xkacds) 
twist, in the latter a dextral (Ae£cds). 
The work is illustrated throughout by excellent diagrammatic 
figures, for the most part coloured, some even in as many as four 
colours. None ofthe familiar “vieux clichés” which persistently 
haunt one text-book after another, are permitted to intrude between 
these covers, all the figures being either specially constructed diagrams 
or else copied or modified from the original figures in the special 
memoirs. In short, the whole book is characterised throughout to a 
marked degree by one most precious quality, that of clearness and 
lucidity both in description and illustration. In conclusion, we con- 
eratulate Messrs Delage and Hérouard most heartily on the first 
results of their labours, and wish them all success in the great task 
which they have before them. KE. A. M. 
(JONIATITES IN THE BRITISH MUSEUM 
CATALOGUE OF THE FosstL CEPHALOPODA IN THE BritisH Musrtum (NATURAL 
History). Part iii. Containing the Bactritidae and part of the suborder 
Ammonoidea. By Arthur H. Foord and George Charles Crick. Pp. xxxiv., 303. 
Published by order of the Trustees. London, 1897. Price, 12s. 6d. 
THE first part of this Catalogue, published in 1888, and the second 
published in 1891, dealt with the Nautiloidea and were written by 
Dr Foord alone. That gentleman’s removal to Dublin made some 
help imperative, and Mr Crick, the assistant in charge of the Cepha- 
lopoda in the Geological Department of the British Museum, has 
proved a worthy collaborator. The experience gained from previous 
work, combined with this fortunate co-operation, has brought the 
present volume, which treats of the older Ammonoidea, very near our 
ideal of what such a museum-catalogue should be. Some of these 
publications of the Natural History Museum have been important 
contributions to knowledge, but have left us still in the dark as to the 
precise extent or value of the Museum collections; others have dis- 
