Zoological Society. 149 



rapidly by the intercalation of smaller costse at variable distances be- 

 tween the larger ones ; the front margin of the larger valve indents 

 the smaller one ; colour white, tinged with yellow ; structure punc- 

 tate ; internal apophysary supports short and annelliform. Length 

 3£, width 3, depth 2 lines. 



Hab. Chinese Seas. Coll. Cuming. 



Obs. — This little Terebratulina may be easily distinguished from 

 all the other recent species of the genus by its size and relative width 

 and length, being much more convex and globular. 



7. Morrisia anomioides, Scacchi, sp. 1843. 



Orthis anomioides, Scacchi in Phil. Moll. Sicil. ii. 



Terebratula appressa, Forbes, Report on the Mollusca and Radiata 

 of the iEgean Sea, 1843. 



Diagnosis. — Shell minute, circular, depressed ; foramen large, 

 round, encroaching ecmally on both valves ; larger valve with a 

 straight hinge-area ; deltidial plates minute, widely separated; 

 smaller valve deeply notched at the umbo ; apophysary system con- 

 sisting of two branches originating at the base of the dental sockets, 

 and united to a small elevated process arising from the centre of the 

 valve. 



Animal furnished with two subspiral or sigmoid arms fringed with 

 comparatively large cilia ; the shell is of a green colour, with bright 

 orange ovaries contrasting with the brilliant white of the ciliated arms ; 

 structure punctate. Length 1, width \\, depth ^ line. 



Hab. Mediterranean; depth 95 fathoms (Forbes). 



Obs. — Some of Philippi's figures of Ter. seminidum are so like 

 specimens of T. appressa (Forbes), that I at first imagined they 

 might belong to the same type ; and in my paper published in the 

 'Ann. and Mag. of Nat. Hist.' for May 1852, I placed Ter. appressa 

 of Forbes as a synonym of Philippi's species : but since that period 

 I have had reasons to believe this to be an error, and that in reality 

 the Italian author's type does not belong to the same species nor even 

 genus, but would be a synonym of Argiope {Ter.) Neapoiitana of 

 Scacchi. I have also ascertained that the shell and animal of this 

 species are figured by Philippi, in the second volume of his ' Sicilian 

 Mollusca.' 



8. Kraussia Lamarckiana, Dav. 1852. 



Diagnosis. — Shell of a somewhat tetragonal form, flatfish, with a 

 moderately deep longitudinal depression in the smaller valve and a 

 corresponding keel in the larger one ; hinge-line nearly straight ; beak 

 truncated by a large emarginate foramen, completed by two small 

 deltidial plates, and by a portion of the umbo of the smaller valve ; 

 hinge-area flat, well defined ; surface ornamented by a number of 

 small costse, augmenting here and there by bifurcation and intercala- 

 tion at various intervals ; apophysary system consisting of two short, 

 central, diverging branches, bifurcated at their extremities ; structure 

 punctate ; colour light yellow. Length 3, width 3, depth \\ lines. 



Hab. Sydney and New Zealand. 



