141 



beds at Table Cape, Tasmania, collected by Mr. It. M. Johnston. 

 Unfortunately the species are very inadequately illustrated ; 

 and also because of the very brief characters given, it is almost 

 impossible to understand the species. However, I have been 

 favoured by Mr. Johnston with the loan of the very excellent 

 ■drawings of the original specimens, and of some specimens 

 named from the types. The species represented are, so far as 

 I can judge, Waldheimia Garibaldiana, and the previously 

 undescribed Terebratula vitreoides, Waldheimia Tateana, and a 

 species erroneously referred to W. Corioensis, McCoy. The 

 last may be a Terebratella ; it is unknown to me. An 

 undescribed Tthynchonella is also referred to in the text. 

 Professor McCoy, in the " Fifth Decade of the Palaeontology 

 ■of Victoria," 1877, figures and describes a new and remarkable 

 Waldheimia as W. Corioensis, and adult forms of W. Garibaldiana 

 under the name of W. macropora. 



From these sources nine species have been well established, 

 and the existence of three or four others are indicated. Adding 

 to these the species now described for the first time, the total 

 number of palliobranchs from the Australian Tertiaries is 33, 

 generically distributed as follows : — Terebratula, 4 ; "Wald- 

 heimia, 15 ; Terebratulina, 4 ; Terebratella, 4 ; Magasella, 4 ; 

 Thecidium, 1 ; and Phynchonella, 1. 



Localities and Horizons. — The surpassing richness in pallio- 

 branchs of most fossiliferous localities in South Australia is 

 imperfectly indicated by the fact that all the above species, 

 •excepting Terebratella Woodsii and Thecidmm australe, have 

 been collected within the province. My experience as a 

 collector beyond the limits of the colony is limited to the 

 Muddy Creek beds, near Hamilton, Victoria. In many of the 

 sections the profusion of palliobranchs and echinoderms 

 recalls a feature of the Jurassic formations. Their generally 

 good state of preservation, and the comparative facility with 

 which the interiors can be dissected out, have enabled me to 

 discriminate species with a much greater degree of confidence 

 than is usually possible. Indeed, no criterion as to generic 

 position can be drawn from the external characters alone. 

 Thus, without a knowledge of the interior of Terebratula 

 Aldinga, that shell might very well have been referred to 

 Waldheimia, if not indeed associated with W. insolita. Again, 

 the external characters by which Terebratella furculifera is 

 separable from W. insolita are so trivial in themselves, though 

 nevertheless practical tests, that one might well hesitate to 

 regard them of specific value. In consequence of a mimetic 

 resemblance among some species in different genera, I have 

 hesitated to assign to its genus any species whose interior 

 characters have not been ascertained. In such cases of 



