322 Mr. A. Adams on some new Genera of Mollusca 



1036. Cribraria argillacea, Pers. Obs. i. p. 90; Sehrad. Nov. 

 Gen. figs. 1, 2. 



On decayed branches and stumps of Scotch fir. Aboyne, 

 Aberdeenshire, 1862. 



Forming broad confluent patches, pouring out a large quan- 

 tity of clay-coloured dust. The least beautiful of the genus, 

 though, when cleared from the spores, the plant is a pretty ob- 

 ject under the microscope. 



1037. C. aurantiaca, Fr. Syst. Myc. vol. iii. p. 174. 



On decayed branches of Scotch fir. Aboyne, Aberdeenshire, 

 with Ceratium, 1862. 



Far less abundant than the last, and a very pretty though 

 minute species. 



[To be continued.] 



XXXV. — On some New Genera of Mollusca from the Seas of 

 Japan. By Arthur Adams, F.L.S., &c. 



Genus Mitromorpha, A. Ad. 



Testa elongato-fusiformis, utrinque acuminata ; anfractibus planis, 

 transversim liratis. Apertura angusta ; columella recta, leviter trans- 

 versim lirata ; labro acuto, intus laevi, postice vix simiato. 



Like the Cancilla form of Mitra, but without any trace of 

 plaits on the columella. By some it would be considered a 

 mitriform Daphnella, which it certainly is. In shape it also 

 resembles the subgenus Genota, but not in texture or surface. 

 Dibaphus and certain Cones also suggest themselves when the 

 characters of this shell are regarded. 



Mitromorpha lirata, A. Ad. 



M. testa subalbida aut pallide fusca, mitriformi, utrinque acuminata, 

 spira aperturam sequante ; anfractibus normalibus 5, convexis, 

 transversim liratis, liris subconfertis sequalibus sequidistantibus ; 

 apertura angusta, labio recto, simplici, plica unica inconspicua 

 antice instructo ; labro intus lsevi, margine crenulato ; columella 

 antice arcuatim truncata. 



Hab. Simonoseki ; Seto-Utchi. 



The two or three nucleolar whorls are smooth, like those in 

 M. filosa from Santa Barbara, described by Dr. Carpenter. A 

 variety or allied species has the whorls longitudinally plicate, 

 and some of the transverse lirse corrugate or undulated. 



Genus Cytharopsis, A. Ad. 



Testa fusiformis, utrinquea cuminata, Cytharce formi ; anfractibus 

 convexis, costellis longitudinalibus et liris transversis cancellatis. 

 Apertura angusta, columella transversim sulcata ; labro extus vari- 



