522 GASTROPODA. [Opisthobranchia. 



grooved, decorated with red or brown lines ; aperture about three- 

 fourths the shell's height, narrow above, widened below ; the columella 

 vertical, often with an indistinct fold above, obliquely truncated at 

 base. Operculum small, horny, linear, transverse. 



There are but few species known. 



Distribution. Lido-Pacific. 



1. Bullina scabra, Gmelin, 1790. Plate 22, fig. 26. 



Bulla scabra, Gmel., Syst. Nat., ed. xiii, 1790, 3434. Bullina scabra, Gmel., 

 Thes. Conch., ii, 563, pi. 120, f. 1. Aplustrum scabrum, Chemn. : Watson, 

 Chall. Rep., xv, 633. Valuta ziczac, Miihlf., Ges. Naturf. Freunde 

 Berlin, viii, 1818, 5, pi. 1, f. 4. Tornatella ziczac, Miihlf. : Don. Bis- 

 marck., 29, pi. 2, f. 20. Bulla lineata, Gray, Ann. Phil, (n.s.), ix, 408. 

 Bullina lineata, Gray, Thes. Conch., ii, 563, pi. 120, f. 2. B. lineata, 

 Wood : Button, M.N.Z.M., 120. B. imdata, H. and A. Adams, G.R.M., 

 ii, 8, pi. 56, f. 5a ; not Bulla undata, Bruguiere. Bullina lauta, Pease, 

 P.Z.S., 1860, 19. Bullinula scabra, Gmel., Index 70. Bullina scabra, 

 Gmel., Man. Conch. (1), xv, 176, pi. 45, f. 18-22. 



Shell ovate, obese, rimate or perforate, spirally lirate. Sculpture 

 consisting of close spiral grooves, formed of confluent oblong punctures ; 

 interspaces flat above, becoming narrower and rounded at the base. 

 Colour white or faint roseate, with 2 distant red spiral lines and nume- 

 rous arcuate or zigzag longitudinal red lines. Spire very short, about 

 one-third the height of the aperture ; outlines convex. Protoconch 

 of 1 smooth whorl, rather large, reversed and distorted. Whorls about 

 4, the last large and swollen, convex. Suture not deep. Aperture 

 large, narrowly angled above, somewhat contracted and effuse at the 

 base. Outer lip thin and sharp, a little straightened at the middle, 

 arched below. Columella vertical, straight, with a very slight fold 

 above, and obliquely truncated at the base. Inner lip with a free 

 edge on the columella, which is recurved over the more or less open 

 umbilical chink, spreading as a very thin glaze over the convex parietal 

 wall. 



Diameter, 6-5 mm. ; height, 9 mm. (Bay of Islands specimen). 

 Diameter, 7-7 mm. ; height, 12 mm. (New South Wales specimen). 



Animal unknown. 



Hub. Hauraki Gulf ; Bay of Islands. Also Tasmania, Australia, 

 Polynesia, Java, Japan, Mauritius, South Africa. 



Fam. RINGICULID^J, Meek. 



Animal completely retractile within the shell, with short foot, 

 head-disc wide, prolonged backward in the middle, a sort of siphon 

 being formed by the rolled-in margins. Radula with central tooth, 

 laterals 2, arcuate, the cusps directed inwards. 



Shell short and ventricose, with conic spire of several whorls ; 

 aperture narrow, obstructed by folds on the columellar margin ; peri- 

 stome thickened outside, often dentate within. Operculum wanting. 



In the Recent fauna this family is represented by but one genus. 



