151 



lirate within but tlie upper ones are conspicuously so, as the 

 shell is quite trauslucent. It is very elegant in form. The 

 band of color bordered by two darker lines is only seen on the 

 last whorl ; the suture covers the line on the spire so that 

 there the whorls seem half white and half chestnut with a line 

 of deep coloring on the boundary. It is shining, and the ribs 

 are numerous, 26 in last whorl. 



No. 55. TcKBONiLLA BLvcLEAYANA. U.S. T.t. elougatissima, tun-itis- 

 ■tima, solidiuscula, alba, nitentc ; anfr. 15, planat'is, oblique costatis ; 

 costis (11-lJ^ in lilt, anff.) Icevibu's, elevatis, rotundatii^, a siitura ad 

 suturamaUingentibus, iiiterstitiis cequantibus, siit.itra sat impressa, aperhira 

 quadrata, apice > (decoll.) Long. 8, lat. 1 mill. 



Shell very long and turretted, rather solid, white, shining, 

 whorls 15, flattened, obliquely ribbed, ribs (11-14 in the last 

 whorl) smooth, raised, rounded, reaching from suture to 

 suture, equalling the intervals in size, suture well impressed, 

 aperture quadrate, apex ? (decollated). Long Bay. W. F. 

 Petterd. Easily distinguished by its small size and turretted 

 habit. It appears to me, however, in shells of such 

 uniform character as Turhonilla, that wo are often dealing 

 with varieties instead of species, and the above may be a case 

 in point. If we knew the conditions of growth in these shells 

 we might decide how far they are dependent on very local 

 nfluences. 



CiXGULiNA ACSTRALis. Nohis. (tide Pro. Hoy. Soc. Tas., 1S75. ) 

 Descriptio emendata. Pro. " carinis in ult. anfr. 5, deinde If, 3, etc." 

 lege " carinis in idtimo anfrac. 5, deinde 3, usque ad apicem." Et pro 

 " basi convexa liris spiralibus (2) elevatis, rotumlatis, ornata ;" lege " basi 

 eonvexa, liris .spiralibus, elevatis, rotundatis ornata ; ajncelcevisubinjlato." 



In the description of the above shell a mistake was made. 

 Instead of " keels in the last whorl 5, then 4, then 3,"' It 

 should be, " keels 5 in the last whorl, then 3 to the apex." 

 The base is also spirally keeled in continuation of the 5 of 

 the last whorl, and not, as stated, with two spiral rounded 

 lirae. The apex is smooth. 



Triforis tasmanica. Mild. A variety of this shell is found 

 at Blackman's Bay, in which one of the three granulose ribs 

 is represented by a smooth narrow keel, and the last whorl 

 scarcely granular, but Avith four or five grooves. The shell is 

 very variable, new species should be very cautiously accepted. 



No. 56. Styloptygma tasmanica. n.s. S.t. parva, elongato-fusiforme, 

 arUice rotundata et latiore, lactea, translucente ; nucleo hyalino, inflato, 

 rotundato, transversa; anfr. (nucleo excluso) 7, tumidiusculis, politis, 

 obsolete striatis ; sutura late marginata, vix obliqua, impressa ; apertura 

 pyriforme; plica, inconspicua, obliqua. Long. 4, lat. 1, mil. 



Shell small, elongately fusiform, rounded and broader 

 anteriorly, milky white, translucent, nucleus hyalin.» inflated, 

 rounded, transverse ; whorls, exclusive of the nucleus, 7, 



