204 



Pdndarus lamnce. 



2.2 



posed of a large square cen- 

 tral piece, faintly scored, and 

 vaulted at each posterior angle, 

 of three somewhat triangular 

 pieces on each side, and a 

 square piece behind, divided 

 by some obscure transverse 

 lines. Front slightly sinuated 

 in the middle ; the antennas 

 extremely minute. Under- 

 neath, the disposition of the 

 mouth, legs, and fin processes 

 seems to be exactly like that of 

 the preceding; but, immedi- 

 ately under the antennae, there 

 are two small wart-like tuber- 



Pandarus lamna: : a, the animal of the natural cleS, which become pure white 

 size ; b, the same magnified. when ^ Abdomen shortly 



pedunculate, linear-oblong; the upper third covered with a 

 pair of oval elytra of a uniform pale colour, smooth ; the suture 

 slightly waved. The central piece of the abdomen blackish, 

 separated by a furrow from the lateral pale pieces, which run 

 beyond it posteriorly and are rounded ; the intermediate sinus 

 occupied by three foliaceous processes, two above and one 

 under them ; and under this, again, the filiform tubes originate, 

 which are nearly twice as long as the body. Underneath, we 

 find, above, four small foliaceous processes arranged trans- 

 versely ; and, below them, two large ones, each of these 

 consisting of two leaflets; and at each side of the filiform 

 appendages there is a small leaflet, and two large oblong 

 ones terminate the tail, each fringed with four ciliated spines. 



I took three specimens of this Pandarus from a Beauma- 

 ris shark, captured, in Sept. 1834-, in Berwick Bay, a few days 

 subsequent to the capture of the individual from which P. 

 alatus was procured. It might have been conjectured to be 

 the female of that species, had not the figure of Edwards been 

 at hand to prevent the mistake ; and, as it will not agree with 

 the description of any species in Desmarest's work on the 

 Crustacea, I am led to consider it as a novel addition to the 

 list of parasitical entomostracous insects. 



Berwick upon Tweed, Dec. 12. 1834. 



[The Migration of Fishes. — It is suggested, in I. 372., 

 that the migration of fishes is, possibly, in some cases, induced 

 by the annoyance they experience from parasitic animals. 

 On the remarks offered in the place cited, the late Rev. L. 



