I 



1 



Bibliographical Notices. 451 



EXPLANATION OF THE PLATES. 



Plate XVII. 



Fig. 1. MzcroporeUa ciliata, Pallas, form itmbonata, Hincks. 



Fir/. 2, Microporella ciliata^ Pallas, form vibraeulifera, Hincks. 



Fig. 3. Microporella ciliata, Pallas, form californica, Busk. 



Fit/. 4. Schizoporella longirostrata, n. sp. 



Fig. o. Schizoporella insculpta, n. sp. 5 a. Ocecium. 



Fig* 6. Schizoporella pristina, n. sp. 



Fig. 7. SchizothecaJissurel(a,n.8Y>. la. A zooecium showing the primary 



orifice. 



Plate XVIII. 



Fig. 1. Scla'zoporclla crassilabris, n. sp. 



Fig. 2. hizoporella tumulosa, n. sp. 2 a. Ocecium. 2 6. Orifice of mar- 

 ginal cell. 

 Fig. 8, Schizoporella crassirostris f n. sp. 



Fig. A. Monoporella hrunnea, n. sp. 4 a. Zooecium showing the suboral 



avicularium. 



2'fy. 6, hizoporella auriculata, IL nil, form ochracea. 

 Fig. 6. Zr Y///a nt&A ft*, n. sp. 6 a. A young zooecium. 



[A figure of Schizoporella Date m will be given hereafter. J 



BIBLIOGRAPHICAL NOTICES. 



CassdFs Natural History. Edited by P. Martin Duncan, M.B. 

 (Lond.), F.K.S., &c. 6 vols., large Svo. London: Cassell, 

 Pcttcr, Galpin & Co., 1877-82. 



The enterprising publishers of the book of which the above is the 

 title have brought out a considerable amount of popular scientific 

 literature, some of it good, some indifferent, or even worse. A 

 form* r natural history of animals, we think in four volumes, fell 

 under the second of these categories ; and the publishers, in com- 

 mencing the issue of a new work with the same scope, have certainly 

 acted wisely in entrusting its superintendence to the hands of a 

 naturalist of repute like Prof. Duncan. The advantage of such a 

 course La pretty clear in the quality of the work produced, which, 

 although somewhat uneven, owing to the varying idiosyncratic* of 

 num« ous authors and t«> lothei cause to which we shall have to 

 advert, is certainly much h her than wo are accustomed to meet 



with in books of the same description. 



In conu< n with the first of the above-mentioned causes of 

 difference in the treatment of different departments of the subject, 

 ii must be remarked that it would be impossible for any amount of 

 editorial supervision entirely to prevent such divergence, complete 

 uniformity of treatment being attainable only in the c e of the 



