1880.] G. Nevill — Neio Species of BracJcish-water MoUushs. 161 



Hyduobia (Belgbabdia) miliacea, n. sp. 



T. minuta, vix rimata, conico-elongatida, solida, parum nifida, alhido- 

 viridula, IcBvigata ; spira paululum producta, apice minuto, acutiusculo ; 

 anfr. 5, convexiuscuU, tdtiinis duohus rapide accrescentihus, ultimo hasi 

 suhplanulato, ad aperfurain gihhositate crassa circmiiscripto ; apertura 

 ovato-rotimdata, intus incrassata, peristoma continuum, valide incrassatum, 

 margine externo arcwato, hasi sinuato, margine columellari suhangulatim 

 contorto, suhrejlexo. Operculum sat profunde immersmn, tenue, pelluci- 

 diim, vitreum. 



Long, vix 21, cliam. If mill. 



Hab. Port Canning. 



Var. minor ; long. 2, diam. 1\ mill. 



Hab. Port Canning. 



Found in great abundance in brackish-water ponds, associated with 

 Valvata (.f) microscopica, Nev., new species o£ Bythinia, Ifartesia, Teredo 

 (/), Fharella, Theora, Stenothyra hlanfordiana, &c. From the last-named, 

 the remarkable callosity behind the outer lip, besides many other charac- 

 ters above recorded, at once distinguishes it. 



This interesting shell is the first extra European species described of 

 the genus (?) Bclgrandia, Bcurg. 



Type Indian Museum, Calcutta ; also in coll. Beddome, Theobald, 

 Hungerford, Joly, Dohrn, and Blanford. 



Subfamily ASSIMINEINiE, [emend.]. 

 Group Lithoglyplu, Troschel, Gebiss der Schnecken, I, 1857 [pars]. 

 Fam. Assiminidae, H. and A. Adams, Genera Moll. 1858. 

 Fam. Assimineidao, Clessin, 1880. 



Section of sub-fam. Pomatiopsinae, Stoliczka, Gast. I, 1868. 



ASSIMINEA SINENSIS, n. Sp. 



T. imperforafa, ovato-conica, solidula, nitida, sit,lghhra, easfaneo- 

 fusea, linea impressa infra suturam suhohsolete notata ; spira producta, 

 conica, apice subacute ; anfr. 7^, suhplaniusculi, ultimus compressus, vix 

 convexiusculus, carina nulla munitus ; apertura parva, subvert icalis, inar- 

 ginibus callo subobsolete junctis, margine externo tenui, margine columel- 

 lari arcuato, incrassato, saturate castaneofusco, inferne subangulato. 



Long. 5, diam. 3 mill. 



Hab. Hongkong. 



I am indebted for this, as for many other novelties, to Surgeon-Major 

 R. Hungerford. 



