112 JOURNAL OF CONCHOLOGY, VOL. ID, NO. 4, OCTOBER, I90I. 



Four specimens from Durban, all different in colour and form, 

 show that this species, like many others of this genus, is very variable. 

 Two are nearly normal as regards coloration, but the one figured is 

 unusually large and has a distinctly channelled suture. In typical 

 specimens of the species the upper whorls are longitudinally costate 

 with a distinct transverse groove cutting across the tops of the costae, 

 thus forming a row of nodules. In the Natal shells there are three 

 such sulci which produce four rows of granules. In the latter also 

 the aperture is somewhat less contracted and the outer lip less thick- 

 ened externally. One of them is globose in comparison with the rest 

 and has a shorter spire than usual. The following dimensions show 

 the variation in size : — 



Length. Diameter. 



(a). 31 18 



(/O- 26I 17 



(4 25 14 



i^O- 23 13 



JV. algida was considered by Tryon^ as a variety of N. pida, from 

 which, however, in my opinion, it is quite distinct. I would add that 

 the "lumping" of species in that monograph is simply grotesque and 

 quite on a level with the colouring of the figures. 



20. Columbella (Astyris) lightfooti. (PI. I., fig. 3). 



Testa ovato-fiisiformis, parva, allnda, lineolis transversis gracilibiis 



ftiscis interri/ptis picta ; spira produda, ad al)icem rotunde ohtiisa ; 



ajifradus 5, primus magnus, globosus, probabiliter Levis, cceteri con- 



vexiiisculi, spiralitei' teniiiter sidcati {siilcis in anfr. penult, drdter 8, 



/// ultitno 18-20), ultivius ob.'ongus, pauIo infra medium zonam haud 



lineatani exhibeiis ; a/-ertitfa parva, subangiista, albida, longit. totius 



area ^^ adcExluans ; lahrum extra incrassalntn, ad niargine/n acutiun, 



fusco-li/ieattiin, snperrie vix siniiatiiin ; columella alba, S7tpra medium 



arcuata, infra obliqua, callotemii induta. Longit. 6 w///., diam. 2^. 



Apertura 2\ lofiga, i lata. 



Hab., Kalk Bay, Cape Colony (R. Lightfoot). 



This pretty species is well characterized by the style of coloration 



and the transverse sulcate sculpture. The interrupted trauoverse 



lines fall upon the slightly raised ridges between the sulci, and the 



interruptions are so regular that the shell presents series of short lines 



one under another. The grooving upon the anterior end of the 



body-whorl is finer than that above. 



21. Columbella (Anachis) burnupi. (PI. I., fig. 2). 



Testa minima, oblonga, turrita, pelludda, cerea, lincis 2-3 transversis 

 interruptis nigrofusds area medium anfractuum ornata ; anfr. 6-7, 



I Man. Conch., vol. iv., p. 36, 1S82, 



