92 Mr. J. C. Melvill on the 



binis fasciis decorate ; apertura ovata ; labro simplici, paullum 

 incrassato ; columella nitida, alba, callosa, apud umbilicum exca- 

 vata ; operculo la^te coucentrice sulcato. 

 Long. 17, lat. 16 mm. (sp. maj.). 



Hal). Persian Gulf {Fonsonh^, in Mus. Brit.) ; Karachi 

 (F. W. T.). 



Belonging to the typical — Eunatica — section of the genus, 

 as characterized by the calcareous and more or less sulcata 

 operculum, this species liears a superficial resemblance both 

 in pattern and colour of fasciation to N. spadicea, Gmel., or 

 Tufa, Born, but is far more rotund and compact than either. 

 The large example figured was not dredged by Mr. Townsend, 

 all his specimens, though alike in other respects, being much 

 smaller and probably not fully grown ; but it was presented 

 to our National Collection some years ago, with the locality 

 " Persian Gulf," by Mr. John H. Ponsonby, to whom I 

 have the great satisfaction of dedicating so interesting and 

 beautiful a species. 



Scalaria {Girsotrema) hidri/ina*, sp. n. 

 (PL I. fig. 10.) 



S. testa attenuato-fusiformi, solidiuscula, ochraceo-fusca ; anfracti- 

 bus a])ud suturas impressis, fuscis, apicalibus ?, cseteris, iu uumero 

 sejitem, longitudinaliter crassicostatis, costis rectis, novem iu 

 ultimo et penultimo anfractu, spiraliler undique leniter striatis, 

 ultimo versus basim subangulato, incrassato, rugoso-lirato, fusces- 

 ceute ; apertura rotunda ; peristomate continuo, percrasso, fuseo, 

 radiatim striato. 



Long. 8, lat. 3 mm. 



Jiab. Karachi. 



A well-marked Cirsoirema allied to S. bicarinata, Sowb., 

 atienuata, Pease, and crassilabrum, Sowb. ; perhaps most 

 nearly to the last-named species, from which it differs in its 

 sutures being not so deeply impressed, thicker and more 

 conspicuous ribbing, much less angled more attenuate form, 

 the continuous, fuscous, radiately striated peristome being 

 similar. 



Scalaria [Constantla) Standeni, sp. n. 

 (PI. I. fig. 11.) 



S. testa parva, fusiformi, tuscata ; anfractibus octo, quorum tribus 

 albis, vitreis, fere lavibus, cseteris ventricosis, apud suturas im- 

 pressis, arctissime decussatis, iulerstitiis exacte quadratis, ultimi 



* 'ibpvfia, a beautiful habitatioa. 



