Additions to Cat<do(jiUi uf tShells. 25 



1903. Isehnoehitou Avilsoni, >Sykes. Pritchard and Gatliff, 

 P.R.S. Vic, vol. XV. (New Series), for 1902, p. 

 202. 

 1912. Lsdmocliiton levis, Torr, T.Pt.S.S.A. vol. xxxvi. p. 168, 

 pi. 6, f. 6 a-f. 

 Hab.— Port Phillip Heads (J. B. Wilson). 



Obs. — Dr. Torr also gave us the type of his species to compare it 

 Tvith the type of I.wilsoni, which is in our National Museum. This 

 w^e have done, and find it to be conspecific. He has requested us to 

 record this fact. His specimen is three-quarters the length of the 

 type of I.wilsoni, which has ten slits in the tail valve. Dr. Torr's 

 has eight or nine in the tail valve. It has been preserved in a solu- 

 tion of formalin, and, consequently, lost most of its coloration, and 

 is in a bad state of preservation. The figure of the head valve of 

 I.wilsoni shows twelve slits regularly disposed. The description 

 states that it has nine slits irregularly disposed. 



IscHNOCHiTON PROTEUS, Reeve. 



1847. Ischnoehitun proteus, Reeve. Conch. Icon. vol. iv., pi. 



18, f. 111. 

 1867. Lepidopleurus proteus. Reeve. Angas, P.Z.S., Lond., 



p. 222. 

 1892. Lsclmochiton divergens, Pilsbry, (not of Reeve), Tryon's 



Man. Conch, vol. xiv., p. 91, pi. 22, f. 74-77. 

 1916. Isehnoehitou proteus. Reeve. Iredale and May, P. 

 Mai. 8oc. Lond. vol. xii., pp. 109 and 110. 

 Hab. — Ocean beach. Point Nepean ; Shoreham, and San Remo, 

 Western Port. 



Obs. — We have had specimens sent to us from New South Wales 

 under the name of I. divergens, Reeve, but that species has minute 

 girdle scales; in I. proteus they are large and solid; in both species 

 the scales are transversely striated. 



It is a handsome species, the predominating colour being green. 

 Interior of tail plate has a central crescent of blackish-green, and 

 in some specimens the interior of the median valves are stained in 

 the centre Avith magenta colour. 



IscHNOCHlTON ATKINSONI, Iredale and jMay. 



1916. Ischnoeliitnn atkinsoni, Iredale and May. P. Mai. Soc. 

 Lond., vol. xii., p. 110, pi. 4, f. 3. 

 Hab. — Shoreham, Western Port. 

 Obs. — A small, pale buff coloured species. 



