BY H. LEIGHTON KESTEVEN. 463 



LoTORiUM EBURNEUM, Reeve, sp. B. 

 (Plate xvii., fig. 24.) 

 Triton eburneiis, Reeve; Tryon, op. cit. p. 24, pi. 13, f. 115. 



Apex of one and one-half whorls, light brown, semitransparent, 

 smooth, shining; covered with a thin light brown epidermis. 



LoTORiUM QUOYi, Reeve, sp. B. 

 (Plate xvii., fig. 25.) 

 Tritoji quoyi, Reeve; Tryon, op. cit. p. 24, pi. 13, f. 116. 



Apex of one and one-half whorls, dark brown, smooth, shining. 

 No epidermis on the specimens examined. 



LoTORiUM NODOCOSTATUM, Tate and May, sp. 



(Text fig. 1.) 



Lcunpusia nodocostata, Tate and May, Trans. Roy. Soc. S. Aust., 

 xxiv., 1900, p. 90; Proc. Linn. Soc. N.S. Wales, xxvi., 1901, 

 p. 355, pi. xxiii., f. 2. 



Apex of three and one-half whorls, perforate, turbinate, white, 

 semitransparent, polished. The sculpture consists of six faint 

 revolving lines, of which that on the periphery 

 is the most pronounced, and of oblique growth- 

 stride, some of which are stronger than others. 

 Dimensions: length 5, breadth 3-3 mm. 



The large size of this protoconch marks it 

 as unique among recent species. Notwith- 

 standing its entirely normal plan of coiling, 

 it appears to me to be a direct link between the 

 mammillate, excentric apices of some fossils, 

 and the normal apices of the recent species. 



To Mr. C. Hedley I am indebted for the p^™^ 1 



opportunity of figuring and describing this L. nodocostatum, 

 apex, from material dredged by him from a 'I&te & May. 

 depth of one hundred fathoms 16 miles east of Wollongong, 

 N.S.W. The species has been identified by comparison with a 

 cotype kindly lent me by Mr. W. L. May. 



