On Some New Species of Marine Mollusca. 67 



stalk. Shell thin, flexible, straw-yellow ; spire rudimentary, 

 but involute ; somewhat pyriform, slightly attenuated in 

 front, and truncated apically ; aperture narrow ovate, 

 truncate behind. Surface finely striated, 



Bi^nensions.— Length 8 millimetres ; width 5 millimetres. 

 Locality. — Lower end of the South Channel of Port Phillip, 

 7 to 16 fathoms, J. Bracebridge Wilson. 



Besides the above, there is an Emarginida, which appears 

 to be new, but which Professor Tate has not yet described. 

 This is a very small but very beautiful species, bright 

 rose-red in the living state. It occurs in the South Channel, 

 (Station 9), and Capel Sound (Station 10). 



Kellia rostellata is found abundantly at Station 1, 

 attached by means of a small byssus to seaweed. It is also 

 met with less commonly at Stations 3, 5, and 8. 



Montacuta semiradiata has, as yet, only been seen by me 

 at Station 14, but I presume it is likely to occur at other 

 stations where its host, the Echinocardium, is common. 



Stylifev hrunneus has been collected by me only at 

 Station 10. As stated by me, when handing it to Professor 

 Tate, it occurs as a rule only on the periproct of the common 

 Strongylocentrotus. I have this season observed one instance 

 of an individual straying away among the spines. Clumps 

 of eggs frequently occur, presumably those of Stylifev, 

 among the spines surrounding the periproct. 



Of Umbrella corticalis s^nd Lohiger Wilsoni, 1 have not as 

 yet been fortunate enough to collect any specimens this year. 



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