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(1ASTEROPODOUSMOLLUSCA 

 of Berwickshire. By GEORGE JOHNSTON, M.D., F.R.C.S.E. 



PART I. 

 CLASS MOLLUSCA GASTEROPODA. 



ORDER PECTINIBRANCHIATA. 



DIVISION SIPI10NOSTOMATA. 



Animal trachelipode, shelled; the shell spiral or convolute, with the 

 margin of the aperture channelled or emargiriate at the base. 

 The genera are all zoophagous, dioecious, and inhabitants of the 



SYNOPSIS OF THE GENERA. 

 * Shell turbinatc, operculated. 



Outer lip much expanded, .... CHENOPUS. 



Outer lip normal, the rim not ribbed. 



Siphonal canal elongated, . . . Fusus. 



Siphonal canal very short. 



Pillar rounded, ..... BUCCINUM. 



Pillar flat, . . ... PURPURA. 



Outer lip with a thick rib or varix, . . . NASSA. 



* Shell convolute, non-operculatc. 

 Aperture linear with toothed lips, . . . CypRyEA. 



1. CHENOPiis.t PHILIPPI. 



Shell turreted; aperture oblong, a shallow canal leading from each 

 extremity along a produced process or beak ; lip greatly dilated, en- 

 tire or digitate, with a sinus contiguous to the canals ; operculum 

 horny. 



1. Ch. pes pelicani, shell pale brownish flesh-colour, finely striated 

 spirally ; the spire tapered, of 10 whorls, raised and nodulous 

 round the middle ; the body with three nodulous bands, the two 

 inferior approximate and small ; aperture white ; lip dilated, 

 sinuated above and below, and furrowed with 4 channels, of 

 which one is up the spire ; canal short, bent. Length 1 ^.ths ; 

 breadth 1 inch. Philip. Moll. Scil. 214. Rostellaria pos pcli- 

 cani, Lam. Anim. s. vert. vii. 193. Flem. Brit. Aniiii. 359. 

 Strombus pes pelicani, Linn. Dillw. llec. Sh. 656. 



t It seems to be now agreed that the shell which forms the type of this genus ought 

 to be separated from the ftottclUtria of Lamarck. Mr Swainson gives the new genus 

 the name of 4'Aomrw, borrowed from Da Costa (Malacology, p. 309) : but Da Costa's 

 genus was ill defined, and was rather coequal with /Vow, ><.< of Lamarck than with 

 < henopus of Philippi. See his Eleui. of Conchology , i>. 230. 



