BELONGING TO A NEW ORDER OF THE CLASS CIRRIPEDIA. 330 
The larva, then, as well as the characters of the animal itself, 
proves it to be a true Cirripede, while, in the former we see a 
confirmation of the relationship, shown by Thompson, to exist 
between these creatures and the Crustaceans. Indeed this ani- 
mal, in several particulars, exhibits a very close approximation 
to them. The shape of the arms or palps, by the sides of the 
mouth, resembles not a little the mandibles of the Nymphons, or 
the anterior feet of some of the higher forms; and the horny 
shield, overlying the expanded portion of the animal, gives some- 
what the idea of a rudimentary carapace: the rostrated upper lip, 
too, and setaceous branchie, have likewise a very crustacean 
appearance. x 
In these particulars, our new animal differs from the typical 
Cirripedes; but not more than in general form, which is very 
unlike that of either of the two great divisions of the class. The 
prehensile arms or feet, too, are highly characteristic in this, 
having, in fact, more the appearance of true feet than the cirri of 
the other Cirripedes ; there are only six, or three pairs, while in 
all the other Barnacles, there are double that number, or six pairs. 
In our animal, the last, or terminal joint, is shortest, and is sim- 
ple, having few, and comparatively short sete: the arms or feet 
indeed appear to be merely prehensile organs, laying hold of prey 
by the aid of the cushion-like swellings, before described as at- 
tached to their inner margins. 
The cirrigerous feet of the other Cirripedes, are also undoubt- 
edly prehensile, but in a very different manner. In these, each 
terminates in a pair of slender, much-elongated, and curled cirri, 
composed of numerous, minute articulations, furnished with a 
multitude of very long sete, arranged in double rows along the 
surface next the mouth. These sete diverge, so that when the 
cirri are spread out, the tips of the sete of the adjoining cirri cross 
each other, making a very complete net, which the Cirripede is for 
ever spreading out, and sweeping through the water in the direc- 
tion of the mouth. Its prey is thus secured, and nothing can 
escape that comes within the range of this simple and beautiful 
apparatus. It is not then by currents produced by the cirri, as 
usually asserted, that these creatures obtain their food; the feet 
VOL. I. ww 
