478 Transactions. — Geology. 



valve, of which 4 or 5 are on the ridge ; imbricated with coarse 

 growth-lines. Punctuations fine, rather distant from each 

 other. Beak prominent, acute ; foramen subtriangular ; the 

 dekidial plates disunited. 



Length, 13 mm. ; width, 12 mm. ; thickness, 8-10 mm. 



Locality. — Broken Eiver (type). 



Distinguished from the last species by its strong rough 

 ribs and more acute beak, as well as by the deeper sinus on 

 the dorsal valve. Its general appearance is much like a 

 Bhynchonella. 



Terebratella rubicunda. 



T. rubicunda, Solander, MS.. Donovan, Nat. Rep., p. 56, figs. 

 2-5. T. sanguinea, Quoy and Gaimard, Voy. "Astrolabe," 

 Zool. hi., p. 556, pi. 85. tigs. 6-7 (not of Leach). 



" Shell somewhat triangularly ovate ; beak tumidly pro- 

 duced, deltidium divided. Valves gibbous, flexuosely chan- 

 nelled in the middle." (Reeve.) ■ 



Length, 19 mm.; width, 18 mm. ; thickness, 10 mm. 



Locality. — Wanganui. 



Recognised by its well-marked anterior sinuation. 



Terebratella furculifera. 



T. furculifera, Tate, Trans. Phil. Soc. Adelaide, 1880, p. 22, 

 pi. xi., fig. 7. 



Shell small, suborbicular, smooth, rather longer than wide> 

 rather depressed, valves equally convex, commissure nearly 

 straight. Beak short, not much incurved, obtusely keeled. 

 Foramen small, incomplete ; deltidial plates well marked, 

 disunited. Septum less than half the length of the valve. 



Length, 16 mm. ; width, 13 mm.; thickness, 8 mm. 



Localities. — Curiosity Shop ; Weka Pass district. 



I have compared New Zealand with Australian specimens, 

 and can find no difference of sufficient importance to separate 

 them. 



Terebratella sinuata. 



Wold, sinuata, Hutton, Cat. Tertiary Moll, of N.Z., p. 36. 



Shell orbicular-trigonal, smooth, valves unequal ; beak very 

 short, deltidium hidden. Ventral valve with a broad marginal 

 sinus; dorsal valve convex, margin much sinuated. 



Length, 25 mm. ; width, 26 mm. ; thickness, 13 mm. 



Not represented in the collection in Canterbury Museum. 



Like the last species in general shape, but distinguished 

 from it by the flatness of the ventral valve, which is not so 

 convex as the dorsal valve. 



