MALENTOZOA. PEDUNCULATA. 357 



These animals are found adhering in great numbers 

 to floating timber, the bottoms of ships, and other 

 objects. They are abundant in warm latitudes, and 

 frequently occur on drift wood on the western coasts of 

 Britain, but are very seldom seen in our district. 



As the Linnaean generic name ought to be retained, 

 especially if the family is to be named Lepadina, " Lepa- 

 didae," or " Lepades," it ought to be given to the present 

 group, which has been called Pentalasmis by Dr. Leach. 



I. Lepas anatifera. Common Barnacle. 



Shell ovato-triangular, obtuse, much compressed, of five blu- 

 ish-white pieces ; the inferior-lateral very large, subtriangular, 

 convex anteriorly, sloping and flattened behind, longitudinally 

 rugose, and marked with faint striae radiating from the lower 

 anterior angle ; the upper valve oblong, tapering downwards, 

 similarly marked; the dorsal valve linear, arcuate, convex, 

 smooth or denticulate along the middle, sulcate on the sides ; 

 the peduncle usually very long, soft, rugose, brownish-grey 

 or dusky, generally red at the base of the shell. Length 

 of the shell about an inch and a-half, breadth an inch; 

 the peduncle from four to ten or twelve inches. 



The specific name, anatifera, or duck-bearing, was given in 

 allusion to the long-popular belief that the Lepades produce 

 ducks and geese, the cirri having been taken for feathers. 



A single specimen found by Mr. Alexander Murray, on 

 the Cruden coast, in September, 1842. Others have been 

 found at various times. 



Lepas anatifera. Linn. Syst. Nat. 1109. Lepas anatifeia. Penn. 

 Brit. Zool. iv. 74. PI. 38. f. 9. Lepas anatifera. Mont. Test. Brit. 

 15. Anatifa laevis. Lamk. Syst. v. 405. ; Ed. 2. v. 675. Penta- 

 lasmis anatifera. Leach. Encycl. Brit. Suppl. iii. 170. Pentalepas 

 laevis. Blainv. Malacol. PI. 84. f. 3. 



2. Lepas stridta. Striated Barnacle. 



Shell ovato-triangular, compressed, with the apex truncato- 

 angulate, of five bluish-white pieces ; the inferior-lateral very 

 large, subtriangular, convex anteriorly, sloping and flattened 

 behind, marked with distinct striae radiating from the lower 

 anterior angle, decussated by fainter striae, and having an ob- 

 solete ridge from the anterior-inferior to the anterior-superior 

 angle ; the upper valve oblong-triangular, tapering downward 

 to a slender point, and similarly marked; the dorsal valve 



