28 ORDER II. PEDUNCULATE. 



a thick membranaceous integument, with a large anterior opening at the 

 top for the passage of the cirri, it being, in fact, merely a wide clavate 

 elongation of the peduncle. There are five oblong testaceous pieces at- 

 tached to this clavate integument ; they are small, narrow, and distant 

 from each other ; two are situated at the sides of the aperture, one dor- 

 sal, and the rest terminal. 



Example. 



PL XV. Fig. 1 to 4. 



Cinaras vittatus, Leach, Enc. Brit., vol. iii. p. 170. pi. 57. 

 Lepas membranacea, Montague. 

 iSenoclita fasciata, Schumacher. 

 Gymnolepas vittatus, De Blainville. 



OTION, Leach. 



Corpus pedunculatum, tunica membranacea, abrupte ventricosa, supeme 

 obtectum, antice apertura hiante. Tubi duo subcylindrici, retror- 

 siim versi, truncati, extremitate pervii, ad apicetn tunica? . Valvae 

 testacese quinque, separatse, duae semilunata? ad latera apertura;, 

 unica minutissima dorsalis, cseterse pariter minutissimee, termi- 

 nales. 



As in the preceding genus, the body of the animal is entirely enveloped 

 in a thick, pedunculate, membranaceous integument, with an aperture at 

 the top for the passage of the cirri ; behind it, however, and this forms 

 the peculiar character of the genus, are two irregularly cylindrical tubes, 

 varying in size in different species. The Otion has five testaceous pieces, 

 very small, and distant from each other, attached to the outer surface of 

 the integument, as in Cinaras ; they have been entirely overlooked by 

 Lamarck, but Dr. Leach has not failed to observe them. 



In the course of our observations on the Lepades, it will be readily 



