119 



Lima JefCreysiana, Tate. PL iv., fig. 8. 



Beference. — Proc. Roy. Soc, Tasmania, for 1884, p. 230. 



Synonym. — Lima suhauriculata, Tenison-AVoods, Proc. Eoj. 

 Soc, Tasm., for 1876, p. 113 (1877), {non Montfort). 



Shell thin, elongate-ovate, with nearly straight sides, sub- 

 equilateral by the slight obliquity of the hinge line, ventricose. 

 Surface ornamented with distant, acute, longitudinal ribs and 

 close-set, undulate, concentric striae ; the rays are very con- 

 spicuous on the middle and anterior parts, but become indis- 

 tinct towards the posterior border; the intercrossing of the 

 medial ribs and the concentric striae form blunt imbricating 

 serratures ; the concentric striae merge into strong folds to- 

 wards the anterior border. Auricles of moderate size, equal, 

 sharply angular. Umbos elevately and acutely produced. 



Dimensions. — Length, 23; breadth, 15; thickness, 16 mills. 



Localities. — Table Cape {B. M. Johnston I) \ Torke Penin- 

 sula, Aldinga, Eiver Murray Cliffs, Mount Gambler ; Muddy 

 Creek and Scbnapper Point, Hobson's Bay {B. Tate). 



L. subauriculata and L. elliptica differ from L. Jeffreysiana 

 by their ribs, smooth sides, medial furrows, and more inflated 

 umbos. Among recent Australian shells the fossil species 

 approaches L. Strangei, from which it differs by its straighter 

 sides, by its more numerous and acute ribs, and by being more 

 ventricose. 



Species dedicated to Mr. Gwyn Jeffreys, F.E.S., the eminent 

 conchologist, in acknowledgment of his help in its elaboration. 



Lima polynema, spec. nov. Plate x., fig. 9. 



Shell thin, ventricose, obliquely ovate ; surface marked witb 

 very fine, numerous (about 90) radial threads and a few distant 

 concentric striae. 



Dimensions. — Yentro-dorsal diameter, about 10; lateral 

 diameter, about 7 millimetres. 



Locality. — Glauconitic sands, Adelaide bore. 



An imperfect specimen only known, but is distinguishable 

 among recent and Tertiary species by its numerous simple 

 radial threads and nearly straight sides. 



Limea transenna, spec. nov. Plate ix., figs. 6a— 6&. 



Syn. — ? Cucullcea minuta, Johnston, Proc. Eoy. Soc, Tas- 

 mania, for 1879, p. 40 (1880). 



Shell small, thin, obliquely subtrigonal ; ventricose, at- 

 tenuated in the dorsal region, expanded towards the ventral 

 margin, whicb is posteriorly obliquely produced. Umbos 

 elevately acutely produced. Valves closed, rayed with numer- 

 ous obtuse ribs, the interstitial spaces broader, granulated in 

 the middle line, and cancellated by equidistant concentric striae 



