4r3G -MOLLUSC A. 



we observe a stomach inflated by a multitude of small cavities 

 in its parietes, which appear to fulfil the functions of a liver, 

 a simple intestine, a double ovary, and a double serpentine 

 oviduct, whose walls produce the prolific fluid, and which, 

 prolonged iu the fleshy tube, open at its extremity.. These 

 animals are always fixed. Linnaeus comprised them all in one 

 genus — Lepas, which Brugieres divided into two, that have 

 in their turn been subdivided(l). 



Anatifa, Brug. 



A compressed mantle, open on one side and suspended to a fleshy 

 tube, varyinjj; grcaily as to the number of testaceous pieces with 

 which it is furnished; twelve pair of cirri, six on each side, those 

 nearest to the mouth being the thickest and shortest. The branchiae 

 are elongated pyramidal appendages that adhere to the external base 

 of the whole of the cirri, or of part of them. 



The two principal valves, of the most numerous species (Penta- 

 LASMis, Leach,) resemble those of a Mytilus; two others seem to 

 complete a part of the edge of the Mytilus opposite to the summit, 

 and an azygous fifth one unites the posterior edge to that of the op- 

 posite valve; these five pieces cover the whole of the jmantle. From 

 the usual place of the ligament arises the fleshy pedicle; a strong 

 transverse muscle unites the two first valves near their. summit; the 

 mouth of the animal is concealed behind it, and the posterior extre- 

 mity of its body, with all the little articulated feet, is a little beyond 

 it, between the four first valves. 



The most common species of the European seas, Lepas ana- 

 tifera, L., owes its specific appellation to the fable which repre- 

 sents it as producing the Bernacles and Macreuses, a story 

 founded on the rude resemblance that has been observed to exist 

 between the pieces of this shell and a bird. The Anatifae adhere 

 to rocks, piles, keels of vessels, See. (2) We may distinguish 

 from them: 



(1) This name of Lepas formerly belonged to the Patellae. Linnaeus, suppos- 

 ing that some of these Cirrhopoda existed which had no shells, gave them the 

 name of Triton: but the existence of these Tritons is not confirmed, and we are to 

 conclude that Linnaeus merely saw the animal of an Anatifa torn from its shell. 



(2) Add Lepas anserifera, Chemn., VIII, c, 856^ — Anat. dentata, Brug., Encyc. 

 Method., pi. 166, f. 6, or ' Pentalasmis falcata, Leach, Edinb. Encyc. 



