164 G. Nevill — New Species of BrachisJi-tvater MollusTcs. [No. 3, 



presso-conoidea, solida, erassiuscula, nitida, subglabra, ad iasim {sub 

 lente) striis incremeiiti subobsoletis munita, saturatissime fulvo-Uvida, infra 

 suturam alho fasciata, fascia prope aperturam plus minusve evanescente ; 

 sutura vix distincta, linea obscure impressa et suhohsoleta iiotata ; spira 

 oituse depresso-conoidea, apice minuiissimo ; anfr. 5, ultimus suhtus per- 

 glolose ventricosus, ad peripJieriam ohsolete suhsuhancjulatus, infra sub- 

 planulatus, circa unihilicum callo lata pallide fusco et obscure alho-linibato 

 munitus ; apertura ampla, suhrotundata, intus incrassata, marginiius callo 

 alhido prope aperturam valido ac distincto (interdum suhobsoleto) junctis ; 

 columella pernotahiliter et valide incrassata, inferne ahrupte retrorsa, 

 iriangulari-linguiformis, applanata ac excavate rugosa, superne in umhilicum 

 ahrupte desineiis. Operculum tenue ae cornemi ; anfr. 3 (suh lente vix 

 distinguendi) in wnbonem subeentralem ac proniinenteni desinentes. 



Alt. 3, diam. 3| mill. 



Hab. Port Canning. 



The most remarkable and abnormal species of the genus as yet de- 

 scribed. The animal is that of a typical Assiminea, both the late Dr. 

 Stoliczlia and myself having examined numerous specimens. The Museum 

 is indebted for its extensive series of this and the following species to 

 Mr. Wood-Mason. 



Type Indian Museum, Calcutta ; also in coll. Dohrn, Hungerford, 

 Blanford, Theobald, Joly, and Beddome. 



Assiminea theobaldiaka, n. sp. 



T. parva, anguste umbilicata, ovato-conica, solidiuscula, vix nitida, 

 corneo-fulvida, suh lente spiraliter oninutissime confertimque sulcata, 

 striis incrementi plus minusve ohsolete decussata ; spira conica, vix producta, 

 apice acuta ; anfr. 6i, convexi, supremi suhlaeves, caeteri infra suturam 

 distincte angulati, superne suhlaeves, inferne spiraliter confertimq^ue sulcati, 

 ohligue suhgranulatim decussati, ultimus glohose suhrotundatus, in medio 

 striis decussantihus plus minusve suhohsolctis, prope umhilicum dis- 

 tinctiorihus, notatus ; apertura sat ampla, suhverticalis, marginihus callo 

 nitido junctis, margine columellari supra leviter contorto, infra rotundato. 



Long. diam. 3 mill. 



Hab. Port Canning. 



In old specimens, the last two or three whorls have a pitted appear- 

 ance, as in many species of Sienotliyra ; in younger ones, the two antepenul- 

 timate whorls have a beautiful granulose appearance under the lens. 

 The oblique and decussating striae are always obsolete on the last whorl, 



