54 



Caedita raouli. Angas, Zool. Proc. , 1872, p. 613. White, tinted with 

 rose, 13 ribs, which are scaly, nodiilous, and spmous. South Coast. Long. 

 23, lat. 19, alt. 11. 



Caedita quoyi. Deshayes, Zool Proc, 1852, 2?. 103. Coarse, trans- 

 •verse, globose, whitish with ribs obsoletely and irregularly nodose. Badger 

 Island, not common. Long. 30, lat. 36, alt, 20. 



Caedita gunni. Deshayes, Zool. Proc, 1852, p. 101. This is my C. 

 Atkinsoni, described in last year's Proceedings.' It is often rayed with red 

 streaks on a dusky ground. Small, transverse, ribs 16, regularly imbricately 

 nodose. 



Caedita amabilis. Deshayes, Zool. Proc, 1852, p. 102, pi. 17, fig. 89. 

 Suborbicular, with about 28 regularly crenately nodose ribs spotted 

 chestnut, with a periostraca. Long. 16, lat. 17, alt. 10. South Coast, 

 rather uncommon. Deshayes gives New Zealand as the habitat, but 

 it does not occur in Hutton's list. 



Mytilicaedia excavata. Deshayes, loc clt., jy. 100. Oblong, with 

 radiate ribs, supporting long irregular, lamellar arched scales. Tasmanian 

 specimens from D'Entrecasteaux's Channel are dull yellow in color, while 

 those from Sydney are orange and larger. Moderately common. Long. 9, 

 lat. 16, alt. 10. Is this Lamarck's Cardita aviculina, which was thought to 

 be identical with C. calyculata (?) Brugieres ? Lamarck says that his 

 specimens came from King's Island and Sealer's Cove. There is at any rate 

 no resemblance between our species and Brugiere's shell. 



Mytilicaedia tasmanica. Tenison- Woods. 



Mytilus LATus. LamTc. Hist. Nat., s.v.. Vol. 7, p. 41. This shell 

 in its young state is sometimes almost an emerald green, but is always rayed 

 with purple by transmitted light, it is depressed, with an acute edge, and 

 weU preserved specimens are covered with a bright olive shining periostraca. 

 When old and worn it is solid, somewhat smooth, purple black, and shining, 

 margins enamelled, and dull green, with scattered, coarse, black hairs, set in 

 a kind of white calcareous disc. Very common on wharves, pUes, etc., 

 Hobart Town. Long. 96, lat. 50, alt. 40. Common in New Zealand. It 

 has in Tasmania been confounded with the American M. ohesxis, Dunker, 

 through a mistaken habitat given by Keeve.* 



Mytilus tasmanicus. Tenison- Woods. This shell, like the last, has a 

 green enamel, but it is of a beautiful clear glassy green. It has also 

 scattered black hairs, but they are set in a horny disc. It is tumid, and 

 perhaps the largest species known. Not common, deep water. Long. 19, 

 lat. 8, alt. 5, centimetres. I hardly doubt now that it is a darker, larger 

 variety of the last species. 



Mytilus DUNKEEi. Beeve, Icon., pi. 5, fig. 17. Said by Mr. Angas to 

 be a Tasmanian species, but I have not met with it. Common in Port 

 Phillip. More gibbous than M. lalus, of which I regard it as a variety. 



Mytilus eosteatus. DimJcer, MS., Mus. Cum., teste. Reeve, Icon. pi. 5, 

 fig. 15. Rather elongated and attenuate towards the umbones, reddish 

 .purple, and nacreous. Lines of growth conspicuously raised ; siuiace 

 covered with very fine, divaricatiog ribs. Common. Long. 39, lat. 8, 

 alt. 19 ? 



Mytilus hiesutus. Lamarck, Vol. 7, "p. 38, Purple brown, sulcate, 

 radiately striate throughout, and covered with long hairs, the shafts of 

 which are prickly. Rare, but common in S.A. and S.E, A. and N. Zealand. 

 Long. 40, kt. 24, alt. 18. 



* In my second series of New Tasmanian shells in the Roy. Soc. Tas. Proc. 

 for 1876; Mytilus dunkeri is referred to as the shell whose habitat is given 

 wrongly by Reeve. This is a misprint for 3L obesus. 



