60 On some New Marine Mollusca. 



tesselata, vel in lineis longit. dispositis strigata. Maj. diam. 

 11, min. 9, Alt S. Hobson's Bay. 



Shell orbiculate, depressed, thin, diaphanous, deeply and 

 perspectively umbilicate; whorls 5 J, rapidly decreasing, 

 rounded, obtusely angular at the periphery, thinly and very 

 finely striate all over with transverse and oblique spiral 

 striae. Umbilicus white, concave, angular at the margin, 

 aperture rounded. Elegantly marbled black and olive, tesse- 

 lated at the periphery with white, or sometimes striped in 

 lines. Common. 



This shell is much varied in the markings, and in its young 

 state is often rose, or brown, or orange in colour. It is of 

 course no more than a variety of the variable Minolia 

 vectiliginea, but I give my own diagnosis as Menke's list is 

 difficult to meet with, and, as I think, hardly sufficient. 



Tapes Yictori^, T. t inwquilaterali, ohlongo-ovata, suh- 

 twnida, antice abbreviata, o^otundata, postice sub-lata,elevata 

 rotundata, et concentrice crebre costata ; costis rotundatis 

 8ub-elevatis, incequalibus, in medio scepe desinentibus ; urn,- 

 bonibus parvis, antice sub-arcuatis ; ligamento lanceolato 

 conspicuo ; dentibus cardinalibus valv. dext. 2, valv. sinis. 2 

 anteriorib. bifidis ; pallide carnea, lineis fidvis divergen- 

 tibus, litterata ad margines punctis intensiorihus maculata ; 

 pagina interna lutea antice etpostico fulve piirpureo tincta. 

 Lat. — , Long. — , Alt. — . Hobson's Bay. 



Shell inequilateral, oblong, oval, subtumid, shortened 

 anteriorly, rounded posteriorly, somewhat wider, raised, 

 rounded, and concentrically thickly ribbed; ribs rounded, 

 sub-elevate unequal, often disappearing in the middle ; 

 umbones small, slightly curved anteriorly, ligament lanceo- 

 late and conspicuous; hinge teeth, two in right valve and two 

 in the left, which are bifid, colour pale flesh, with brown diver- 

 gent letterlike lines, which are more intense towards the 

 margins ; inner surface yellow, stained at each end a purple 

 brown. 



Circe pythinoides, n.s. C. t parva, crassa, suborbiculata, 

 vix gihbosa,parum, quadrata, albida, postice atro-purpurea 

 maculata, radiatim costata^, costis irregularibus, rude 

 nodose granulatis ad marginem scepe divisis, antice et 

 postice di'Varicatim, bifurcatim plicatis, uonbonibus acutis^ 

 vix curvatis, lunula late ovata, purpurea, marginibus 

 incrassatis, valde flexuosis, pagina interna nivea, dentibus 

 crassis, conspicuis. Long. 25, Lati 22, Alt. 10. Victoria. 



