So MELVILL : NEW GASTROPODA FYOM THE PERSIAN GUl.F. 



Rissoina (Phosinella) phormis,-' n. sp. 



PI. viii, fig. 2. 



R. testa parva, ovato-oblonga, alba, solidula, anfractibus 6 — 7, quorum 

 apicales 2, vitrei, perlaeves, caeteris apud suturas impressi.s, undique dense 

 clathratulis, interstitiis s([uarrosis, aperUira oMique ovata, peristomate ineras- 

 sato extus aspero, intus laevigato, columella obliqua, simplice. 



Long. 3.50, lat. 1.50 millim 



Hah. — Gulf of Oman, lat. 24"^ 58' N., long. 56' 54' E., 156 fathoms. 

 But few examples of a small cancellately whorled Rt>'wina, smaller than any 

 species of the subgenus Phoxim-lla that occur in the same seas. All seem 

 dead shells, but in all [probability the shell would be colourless in life. 



Ethalia earneolata, MlIv. 



var. rubpostrigata, nov. 



IM. viii, fig. 3. 



E. testa cum forma typica convenit, sed oninincj laevigata, nitida, perobscure 

 anfractum apud ultimun bivitlata, undicjue longitudinalitcr rubris flammis et 

 lineis pulcherrima ornata. 



Hab. — Dabai, Persian Gulf. 



A very few specimens dredged in 1904 at tlie above locality, differing 

 mainly in painting from the original type (jf this species, but so remarkable 

 and conspicuous is this form, that it is considered worthy of being specially 

 singled out under a varietal name. Eor description of E. cavneulata, vide 

 Mem. and Proc. Manch. Soc, No. 7, p. 19, \)\. \ii, figs. 25, 26. 



Omphalius eollingei, n. ^p. 

 PI. viii, fig. 4. 



O. testa crassa, mediocri, conica, nigrobrunnea, anguste et profunde um- 

 bilicata, anfractibus 6, quorum apicales \h laeves, informes, vitrei, caeteris 

 spiraliter granocostatis, costis ad regionem anfractuum superiorem juxta 

 suturas duabus praecipue majoribus nodulorum ordinibus decoratis, nodulis 

 nitidis, rotundis, laevibus, infra, antepenultimo el penultimo binis, ultimo 

 tribus gemmarum ordinibus usque ad peripheriam praeditis, carina periph- 

 eriali crassa, ordine noduloso duplicato, regione basali. circa umbilicum sex 

 ordinibus nodulorum parvis, .symmetricis, aequidistantibus, apertura trapezoide 

 intus margaritacea, labro angulato, area columellari infia umbilicum bi vel 

 tricalloso, callo albo, nitente. 



Alt. 15, diam. 16 millim. 



Remarkable in its resemblance to certain South American Oiuiiludii, 

 e.g. O.Jf.-c.arinaiiu and ^-coifiaia^, Wood, of which it is the Eastern exponent. 

 It may be distinguished by its blackish-brown colour, thickened substance, 

 and neat concatenaton of variously sized rows of spiral noduled gemmae, the 



3 Popixos, a basket. 



