464 NOTES ON PROSOBRANCHIATA, 



LOTORIUM RUBICUNDUM, PeiTJ, sp. 



(Text fig. 2.) 



Triton nodiferunij Lamk.; Tryon, op. cit. p. 10, pi. 3, f. 17. 



Apex of three and one-half whorls, semitransparent, delicate 

 pink, smooth, shining. 



The large size and bright colour of this apex give it a different 

 character from any of the others. Although semitransparent, it 

 has an appearance of strength which 

 others lack. The epidermal original is 

 cast very early in the life of the indivi- 

 dual; a specimen of onty four adult 

 whorls, obtained alive, shows no sign of 

 it. That it had an original corneous 

 mould may be generalh' proved bj'- 

 Fig. 2. breaking off the tip of the protoconch, 



L.( Septa) nodiferum^'LQ.mk. ^hen the remains will be seen attached 

 to the base of the piece broken off, or to the top of the part 

 remaining. 



The following descriptions of the apices of L. parkinsonianum 

 and L. philoynelce are reprinted that they may be compared with 

 those of L. tortirostris and L. oligostirum on pp. 469, 470. 



LoTORiUM PARKINSONIANUM, Perry, sp. 



Triton fusiformis, Kiener ; Tryon, op. cit. p. 11, pi. 4, f. 22; 

 Kesteven, Proc. Linn. Soc* N.S. Wales, xxvi., 1901 (1902), 

 p. 712, pi. xxxv., ff. 3, 4, 5. 



" Protoconch ovoid, umbilicate, thin, semi-pellicid, shining, 

 corneous, light brown, variously marked with spots or stripes of 

 darker colour; consisting of about three whorls, covered with a 

 very thin light brown epidermis. Transversely sculptured with 

 very fine growth-lines; the epidermis supplies four ciliated ridges 

 which encircle the last whorl, the top one of which is continued 

 on the earlier whorls. . . ." 



