CANCELLARIA 



sutures, having completed a reflected outer lip at various 

 periods of their growth; in a very few species these varices 

 are regularly placed in two equi-distant rows passing from 

 the apex to the base of the shell: from these and other cha- 

 racters we think it will be convenient to divide the species 

 of this Genus into four sections, as follows : 



§ 1. Testae apertura in canalem brevera, recur vam, producta; plici* 

 columelJae superioribus compressis. 



To this section belongs the Cancellaria reticulata, Lam. 



§ 2. Apertura in canalem brevem, recurvam, producta ; columella bi- 

 pli^ata, plica inferiore majore ; varicibus paucis, irregularibus. 



To this section belongs the Murex senticosus, Linn, (Phos senticosusy 

 Montf.) 



§ 3. Apertura paene in canalem producta; columella triplicata; vari- 

 cibus distinctis, bifariis. 



The only species -vve know belonging to this section is a very elegant 

 small shell, which we believe is not described ; we have therefore named it 

 and engraved it in our plate: it is a fossil, found near Paris. 



§ 4. Apertura paene in canalem producta; columella biplicata, versus 

 labium externum intiexa. 



Several fossil species represented in Brocchi's Conchiologia fossile sub- 

 appenina and some others found at Bordeaux, belong to this section. 



A very elegant and well characterized Genus, of which 

 several recent species have been long known ; they are in- 

 habitants of the Indian ocean and of the coasts of Africa 

 and America; they are rare, but not very remarkable, and 

 have therefore never risen to great fame among collectors ; 

 nothing, however, can be more elegant than the cancel- 

 lated or reticulated, sometimes strongly varicose outside, 

 decussated by almost as strong transverse lines. The fossil 

 species are many of them extremely beautiful : they are 

 found in the London Clay at Hordwell; in a similar form- 

 ation at Piacenza; and in the Calcaire Grossiere about 

 Paris; at Bordeaux and in the Cotentin. 



Fig. 1, Cancellaria reticulata, which is, perhaps, the commonest of the Genus 

 and may be considered as the Generic type; it is the Valuta reticulata 

 of Dillw. 



2. Cancellaria costata, which we have thus named on account of its 

 strongly marked ribs on the outside ; it is figured in the Encycl. Me-- 

 thodique, tab. 374, f. 5. and is the Valuta Cancellata of Dillwyn. 



3. Cancellaria elegans : a shell which we do not find described any 

 where ; it is from a specimen in Mrs. Mawe's collection. 



4. Cancellaria suturalis, a fossil species from the neighbourhood of Paris, 

 we have named it from its double row of varicose sutures, 



5. Cancellaria lyrata. Valuta lyrata^ Brocchi, Conch, fossil, subap. 

 t. 3. f. 6. 



In the above figures, we have taken care to give an 

 example of each of the sections, into which we have di- 

 vided the genus. 



