lOO 



whorl is also sculptured with numerous obliquely-curved longitu- 

 dinal plicje; rostrum of moderate length. Aperture elongately 

 sub-oval; sinus rather deep, and not very wide; canal open, 

 moderately wide, and slightly curved. 



Length, 32 ; Avidth^ ii millim. 



Hab. :— Mouth of Tugela River N. by W., distant 18 miles. Depth, 

 55 fms. Bottom, mud- 



This shell somewhat resembles P. gcnunaia. Hinds, but it is 

 larger and somewhat different in detail. It also seems to have 

 affmity with the much larger Chinese species P. Kicneri, Doumet. 



Fleurotoma marmorata, Lamarck, Anim. S. Vert, vii- p. 95. 

 Reeve, Conch. Icon (Pleur.) fig. 21 A. (z'ar. maculata). 



The shells resemble in colour and pattern those which are 

 pretty abundant in the China Sea, ]'!iili])pines, &:c-, but the keel 

 is less prominent. 



Hab- : — .Same as last- 



TuRRiTKLLA I'LWCTicuLATA, Sowerby, Proc. Zool. Soc, jS/O. 

 p. 253, ^Marine Shells of South Africa (Plate V. fig- 102). 



Several small specimens obtained in l;irge trawl in St. Francis 

 Bay- Lat., 34''2' 45" S. ; long.. 25°io' E. Depth, 30-34 fms- 



SiLinuA iuLLTA, Wood (= T. Japonica, Duhker). 



Hab.: — Amatikulu River mouth N.W. by N., distant 10 rai'es. 

 Depth, 24 fms. Bottom, sand and shells. 



This species is very widely distributed- The Japanese and Red 

 Sea shells can scarcely be distinguished, and though the South 

 .'Vfrican specimens sent me not being fully developed, are smaller, 

 they are m other respects similar. 



Arca (Barbatia) lactea yar- gtbba, Krauss (Plate II- fig. 

 11)- Sud Afric, Moll. p. i6- 



Hab. : — Durnford Point, Natal, N.E. by E., distant 9 miles. 

 Depth, 13 fms. (dredefrlV Bottom, sand and shells, hard sround. 



In figuring this variety, I intended to give it a specific name, 

 relying principall\- upon its obesity of form and its small 

 diamond-shaped ligament. Upon comparing, however, a large 

 nitmber of specimens of A- lactea — British, ^Mediterranean, and 

 South African — I find tliem to wary so much in the form of the 

 shell, as well as m the size and shai^e of the ligament, that I am 

 c<:)nstrained to adopt Krauss' view tliat this form is nothing more 

 than a varietv. 



Published 25th September, 1902. 



