RISSOA. 13 



traces of punctures : colour pale yellowish-brown, with now 

 and then two bands of a tawny hue, one immediately under 

 the suture and the other below the periphery ; pillar-lip often 

 stained with reddish-brown : spire acute : ivhorls 6-7, rather 

 convex, and gradually enlarging, the last occupying about three- 

 fifths of the spire ; the penultimate is nearly as broad as the 

 last whorl: suture slight, narrowly excavated : mouth roundish- 

 oval, somewhat expanded outwards, finely and closely furrowed 

 on the inside of the labial rib ; the furrows correspond with the 

 spiral strise : outer lip thin and very narrow, as in all the other 

 species of this section : inner lip slight and reflected on the 

 pillar, behind which there is a narrow groove, but never a 

 decided umbilical chink : operculum filmy, with a short spire, 

 and finely striated in the line of growth. L. 0*15. B. 0-075. 



Habitat : Nearly every part of our coasts, from the 

 Land's End to Lerwick, in 7-50 f. ; not uncommon. 

 Fossil in the south of Italy and in Sicily (Philippi — 

 assuming this to be his R. textilis) . R. reticulata of S. 

 Wood, from the Coralline Crag, more resembles R. cala- 

 thus, and mav be an intermediate variety. Loven, Sars, 

 M f Andrew, Danielssen, and Malm have recorded the 

 present species as Scandinavian, from Molde in Finmark 

 to Bohuslan in the south of Sweden, the two last-named 

 authors giving respectively 40-60 and 20-30 f. North 

 coast of Holland, 17f. (Malm) ; Vigo (M'Andrew); Gulf 

 of Lyons (Martin); TD&lm&tisL (Brusmsi } 2LS Alvaiiia Beani) ; 

 Cannes (Mace); Spezzia (the Marquis Doria and J.G. J.); 

 Algeria (Weinkauff) ; and iEgean 30-185 f. (Forbes). 



The sculpture of some specimens is rather stronger 

 than that of others. Mediterranean specimens are fre- 

 quently marked by highly coloured bands. This shell 

 is more oblong than R. cimico'ides, and not so conical 

 (partly in consequence of the penultimate whorl being 

 prominent in R. reticulata) , and the cancellation is finer 

 and closer. " The animal is active, and freely shows its 

 points'" (Clark). 



