92 scalariid^e. 



ridges, which are reflected o*r folded backwards, but not flat- 

 tened as in S. Turtoace ; there are 9 on the last whorl, 10 on 

 the penultimate, and 8 on the next, diminishing in number 

 towards the apex ; the ridges are somewhat broader at the top 

 of each whorl, and cemented to those in the preceding whorl, 

 so as to make the series continuous in an oblique direction ; 

 they do not (unless very rarely) form varices, nor is one larger 

 than any of the others except in the course of growth ; under 

 a good magnifying-power their interstices are seen to be some- 

 times marked with a few extremely slight and indistinct spiral 

 striae, and occasionally also with delicate and close-set longi- 

 tudinal striae or impressed lines, which latter especially cover 

 the ridges ; the first 3 or 4 whorls are quite smooth : colour 

 varying from cream to fawn, with frequently (as in rJ. Turtonce) 

 3 purplish-brown or coffeecoloured bands on the body-whorl, 

 and 2 on each of the other whorls ; these bands, however, are 

 not continuous, but broken and divided into short streaks ; 

 sometimes the shell is beautifully mottled all over with pur- 

 plish-brown, although retaining the lowest band; apex light- 

 brown : spire rather abruptly tapering to an apparently fine 

 point ; apex flattened, slightly reversed or inflected, but not so 

 decidedly as in the genus Aclis: ivhorlslo-16, convex, gradually 

 enlarging : suture deep : mouth more round than oval, more or 

 less angulated above and below : outer lip encircled and 

 strengthened by the last-formed ridge, somewhat reflected: 

 inner lip broad, extremely thick at the base and lower angle 

 of the mouth ; no umbilicus : operculum dark-horncolour, 

 having about 6 turns, concave in the middle, and marked with 

 coarse flexuous striae in the line of growth. L. 1*5. B. 0*6. 



Habitat : English, Bristol, and St. George's Chan- 

 nels j all the coasts of Ireland ; Kent (Montagu and 

 others); Dogger bank (Rich); Scarborough (Leckenby); 

 Leith (Da Costa) ; Dunbar (Laskey) ; Clyde district 

 (Hennedy and others) . It is usually an inhabitant of 

 the coralline zone ; but Mr. Sturges-Dodd found living 

 specimens at very low tides in Pontac Bay, Jersey. Es- 

 tuarine deposit at Selsea, Sussex (Godwin- Austen) ; Ire- 

 land (Smith) ; post-glacial bed in Norway, 50 feet 

 (Sars) ; North Italian tertiaries (Brocchi) ; Sicily (Phi- 

 lippi). Its foreign range, as recent, extends from Fin- 



