Thomson. — Fossils from Kakanui. 101 



Terebratulina suessi, Hutton. Plate XIV, fig. 5, a, b, and c. 

 1865 : Terebratulina, sp., Suess, Reise der " Novara," Palse., 



p. 57, pi. ix, fig. 6. 1873 : Terebratella suessi, Hutton, Cat. 



Tert. Moll. N.Z., p. 37. 1905 : Terebratulina suessi, Hutton, 



Revision, Trans. N.Z. Inst., p. 475. 



In the " Novara " palaeontology* Suess refers to this species 

 as Terebratulina, but in the description of the plate (ix) he calls 

 it Terebratella, sp. ; and Hutton, in his earlier paper (1873), 

 followed him in this, correcting the genus in 1905. The simi- 

 larity to T. scouleri, Tate, is most marked, and the latter may 

 have to disappear. The ear-like processes on the dorsal valve 

 characteristic of Terebratulina have not been noticed in earlier 

 descriptions. 



This species is abundant in the quarry limestone, and also 

 occurs in the fossiliferous layers of the Kakanui breccias, as well 

 as on Oamaru Cape. 



Photos of the shell, and of the interior of the dorsal valve, 

 showing the loop, are given. The photos show two varieties 

 of shape and ornamentation, between which all intermediate 

 forms may be found. 



Magellania sinuata, Hutton. Plate XIV, fig. 3. 



1873 : Waldheimia (?) sinuata, Hutton, Cat. Tert. Moll. N.Z., 

 p. 26. 1885 : Terebratella (?) sinuata, Hutton, Quart. Jo urn. 

 Geol. Soc, 1885, p. 553. 1905 : Terebratella sinuata, Trans. 

 N.Z. Inst., 1905, p. 478. 



Captain Hutton considered these specimens to be the same 

 as his Waldheimia sinuata. They agree also with specimens 

 in the Otago Museum labelled by him. They differ, however, 

 frorn his description in having a deltidium conspicuous, if small, 

 and in having a sharply keeled umbo. The description should, 

 then, read : " Shell orbicular-trigonal, valves subequal ; beak 

 very short, umbo keeled ; hinge-line angular ; deltidium con- 

 spicuous. Ventral valve with a broad marginal sinus ; dorsal 

 valve convex ; margin much sinuated." 



There is no evidence that the brachial loops are twice joined 

 to the septum, so the original generic determination is sustained, 

 except that Magellania has now replaced Waldheimia. 



This species is abundant in the Kakanui greensands, and 

 presents considerable variety in form, partly due to crushing. 

 The margins in stout shells are little sinuated. It approaches 

 M. lenticularis. Some rather similar shells were considered by 

 Captain Hutton as new, but the amount of material gathered 

 does not justify the description of new species. 



* Suess, Reise der "Novara," Palse., p. 57. 



