6o SYKES : MALACOLOGICAL NOTES. 



Heckel (SB. Ak. Berlin, 1855, Bd. xvii, p. 16S) and Peters (Wiegm. 

 Arch., Bd. xxi, i, p. 247). 



The earliest publication of the name that I can trace in Mollusca 

 was by Pfeiffer (Malak. Blatt., Bd. iii, p. 58) in 1S56, where he states 

 that the name was commmiicated to him by Shuttleworth and gives 

 as the type Ci/closfoma ru<julosurii, Pfr. Subsequently Pfeiffer (Mon. 

 Pneum. Sui)pl. I, p. 102) refers to it as "Shuttleworth in litt. 14 Sept., 

 1852." 



If these facts be correct the name cannot stand in Mollusca and I 

 therefore propose, taking C. rwjulosum, Pfr., as the type, to replace 

 Ctenopoma, Pfr. non Peters, by 



RHYTIDOPOMA, nom. nov. 

 8.— Note on Ceeina manehurica, A. Ad. 



This genus and species were characterised by Adams (x\nn. Nat. 

 Hist., sen 3, vol, viii, p. 308) in October, 1861, without any figure. 

 Authentic examples have come into my hands, and I take this oppor- 

 tunity of illustrating the form. 



Fig. 2. — Cccina manehurica, A. Ad. 



It may be noted, while dealing with this species, that the note 

 by Dr. Moellendorff (Nachr. Deutsch. Malak. Ges., 1900, p. 153) 

 that Blanfonlia japonica, A. Ad. " niemals diagnosticirt, sondern nur 

 abgebildert worden," is inaccurate. The species, as also B. hensoni, 

 was described in the same paper as Ceeina, under the generic term 

 Tomicliia. 



