SOUTH AFinCAN MARINE MOLLUSOA. 39 



oniainented in a veiy unusual niauner with close-set tubercles, 

 the varices upon tlic ridgx's are squamosely produced and 

 the lines of growth between the ridges are also somewhat 

 squamous. The body-whoi-l exhibits six principal spirals and 

 two minor ones anteriorly, which are close together, also a 

 basal ridge which is scaled and forms the umbilical rimation. 

 The dark lines within the aperture correspond to the external 

 ridges. The edge of the labrum is somewhat frilled by the 

 termination of the ridges. 



Urosalj)inx contra eta (Reeve). 



Urosalpinx contracta {Rerre) : Smith, ' Proc. Malac. 

 Soc.,' vol. V, p. 376. 



This is merely a variety of the Ricinula heptagon a lis, 

 Reeve, already quoted by Sowerby (' Marine Shells S. A.,' 

 p. 15) as Sistrum heptagon ale. According to Professor 

 Gwatkin, who has examined the radula, its position in the 

 genus Urosalpinx appears to be justified. The specific 

 name heptagonalis, having a few months' priority, should 

 be retained. 



Latiaxis tort i lis H. and A. Admiis. 



Latiaxis tortilis A. Adams: Sowerby, 'Marine Invest.,' 

 vol. ii, p. 228. 



Hab. — South Africa, 166 fathoms. 



The shell figured by the late Gr. B. Sowerby ('Thesaurus 

 Conch.,' vol. V, PI. CCCCXXIV, fig. 1) is not the actual type 

 specimen in the Cuming collection. It was described b}' H. 

 and A. Adams (not A. Adams only) and is probably merely 

 a white variety of L. idoleum Jonas as suggested by Gray 

 and Try on. The name idoleum being a substantive cannot 

 be altered to idolea, as given by Try on and Sowerby. 



* P u r p u r a c a s t a n e a Kiisfer. 

 Purpura castanea Kilster : Smith, 'i. of Malac.,' vdl. xi, 

 p. 83. 



Hab.— Port Alfred. 



