APPENDIX MOLLUSCA. 



553 



HALIOTIS OVINA, Chemnitz. 



Pilsbry, Man. Conch., xii., 1890, p. 125, pi. xix., figs. 7, 8. 

 A specimen was obtained at Funafuti by Mr. A. E. Finckh. 



TKINOSTOMA PARVULUM, sp. nov. 

 (Fig. 64.) 



.: 4 



Fig. 64. 



Shell minute, solid, depressed turbinate, 

 with slightly elevated spire. Colour cream. 

 Whorls four. Sculpture about fourteen 

 elevated, spiral lyrse which are weaker 

 and widest apart above and closer and 

 stronger towards the umbilicus. Above 

 and on the periphery, their interstices are 

 occupied by one or two fine spiral threads. 

 No transverse sculpture is apparent. Base 

 rounded. Umbilicus oblong, narrow, deep; 

 the basal sculpture winding obliquely into 

 it. Aperture oblique, circular, with a smooth, inner, raised 

 margin and a stout varix alternately and evenly grooved and 

 ridged by the spiral sculpture. The left lower margin of the 

 varix is produced in a tongue over the umbilicus. Major diameter 

 1-14, minor 1; height -8 mm. 



One specimen dredged in 36 fathoms north of Pava Islet. 



This species, the least of the genus to which I have assigned it, 

 has an equal claim to be placed in Liotia. The subumbilical 

 tongue, a rather artificial feature, has governed the present generic 

 disposition. 



Shell small, per- 

 forate, subdiscoidal. 

 Colour whi t e. 

 Whorls three and 

 a half, rounded, 

 gradually increas- 

 ing, last descending 



LL 



TEINOSTOMA ROTATUM, sp. nov. 

 (Fig. 65.) 



Fig. 65. 



