PHILINE. 455 



margin jagged : mouth having a transverse orifice, and armed 

 with a pair of horny jaws : tentacles united to form a large 

 squarish-oval disk, which is notched in front : foot very large ; 

 sole as broad as it is long, somewhat exceeding half the length 

 of the whole body ; it is indented on each side in front ; side- 

 lobes wing-like, thick, and folding back, with jagged edges : 

 gizzard none ; but, instead of this organ, the stomach is fur- 

 nished with two horny and finely shagreened plates, one on 

 each side : gills arranged in a single coarsely pectinated plume, 

 situate under the shell. (Love'n, and Clark's MS.) 



Shell oval, tumid, but compressed or pinched in below the 

 apex, more solid than any of its congeners, nearly opaque, 

 glossy in the young only : sculpture, numerous strong and 

 irregular longitudinal wrinkly stria? (fringed at their edges) 

 and finer spiral striae, which by intercrossing give the surface 

 a reticulated and frosty aspect, or that of lacework ; the reti- 

 culation is less distinct in full-grown specimens ; the very 

 young have spiral rows of circular dots, as in P. punctata ; 

 edges of the mouth plain : colour white, with frequently a broad 

 tawny band round the middle and a tinge of the same hue on 

 the upper part ; these markings are rather evanescent, and 

 appear to be superficial: spire very small, sunk below the 

 apex or crown, which is considerably thickened : whorls 2|, 

 irregularly twisted and indistinct : suture deep and excavated : 

 mouth oval, contracted above by the periphery and inflexion 

 of the outer lip, curved below ; it occupies about two-thirds 

 of the under surface : outer lip fiexuous, widely indented in 

 the middle, and bending inwards above ; edge often thick ; the 

 top slightly exceeds the crown in height; outer corner rounded; 

 inner corner receding and acute-angled : inner lip broad and 

 rather thick on the upper part, occasionally forming in the 

 middle a tooth-like process or fold (in one specimen converted 

 into a cluster of minute pearls), behind which is a distinct um- 

 bilical groove or depression. L. 0-25. B. 0-2. 



Yar. dilatata. Nearly smooth, more expanded and some- 

 what angular at the sides, and abruptly attenuated towards 

 the crown. L. 0-075. B. 0-05. 



Habitat: Dredged off Budleigh Salterton (Clark); 

 Plymouth (Webster) ; Falmouth, in trawl-refuse (Miss 

 Vigurs, fide Cocks); Whitburn, dredged and from the 

 stomachs of fish (Howse, fide Alder); Loch Fyne and 



