A. Leprdlia. (On asnel!.; 

 E Lepr*lia flydnmdnii. >: 

 I. Leprdlia Malusii. x 

 M. 'Eschara fldbellans. x 

 Q. Lumdites cdpulus. 



1'OLYZOA, IV. 

 B. Leprdlia alfUa. x C. Lepralia -nwnoceros. x 



F. Lepralia personata. x 

 J. Leprdlia. ditcreta. x 

 N. Retepora Beanidna. 

 R. Lunulites cdpulus. x 



G. Leprdlia variolosa. x 

 K. Cellepora fusca. 

 O. Cupuldria Lowei. 

 S. LunuUtes cancelldtus. 



D. Leprdlia Gdttyce. * 

 H. Leprdlia nitida. x 

 L. 'Eschara folidcea. x 

 P. Cupuldria Lowei. x 

 T. Selendria maculdta. 



U. StZnutHd wtaew'dfa. (Section.) 



V. Selendria maculdta. (Section, x ) 



Tlie sign x signifies tliat the object is magnified. 



one of these objects. It is a British species, and the specimen is represented of the 

 natural size. 



The next few figures represent examples of an interesting family of polyzoa called 

 Selenariadie, because they are round as the full moon, or JSTorval's famous shield. In the 

 circular form of the margin they all agree, but differ considerably in their curvatures, 

 some being with one side plane and the other convex, while others are convex-concave, 

 like a watch-glass, or, to speak more accurately, like the lens technically called a meniscus. 

 They are all remarkable for their very large vibracula. 



At fig. is one of these creatures, Cupularia Lowei, so called on account of its resem- 

 blance to a dome. It is represented of the natural size, but at fig. P is a magnified portion 

 of the same species, exhibiting the form of the cells and the enormous vibracula with 

 .which their mouths are swept. This species is found at Madeira. Fig. Q is the LunuUtes 

 capulus of the natural size, and fig. E represents the same species highly magnified, for the 

 purpose of showing the regular arrangement of the cells and the curious vibracula, which 

 in this genus are usually bifid or even trifid at their extremities. Another species of the 

 same genus, Lunulites cancellatus, is given at fig. S. 



At fig. T is shown a very shield-like genus of this family, its name being Selenaria 

 maculata, and a section of the same specimen is given below, at fig. U. The reader will 

 not fail to remark its exact resemblance to the target-shield used by many nations, ancient 

 and modern. Fig. V is a portion of the same species, as it appears when highly magnified 

 and is given for the purpose of showing the curious vibracula. It may be here mentioned 

 that in this last-mentioned family the vibracula are thought by some naturalists to act as 

 locomotive organs. 



GG 2 



