ORTMANN I TERTIARY INVERTEBRATES. 26 1 



again ; and Valuta alta was probably wrongly identified (see p. 232). 

 Thus we may say, that Sowerby and Darwin have added to the only 

 known species (Hypechimts patagonensis], 23 new species, bringing up 

 the number of species to 24. 



In 1846, Desor adds Scutella patagonensis and Echinarachnius jtiliensis, 

 which are now regarded as identical, giving 25 as the total number of 

 Patagonian species. 



No additions to our knowledge of the Patagonian fauna were made till 

 1885, when Rochebrune and Mabille described the following new species: 

 Photinula detecta, Natica secunda and Natica omoia. 



Only N. secttnda has been recognized subsequently, and, owing to the 

 poor descriptions and lack of figures, we can add only this one to the well 

 established species of the Patagonian fauna, giving the number 26. 



In 1887 Philippi described the following new species from Santa Cruz: 



1. Nucula patagonica. n. Psammobia patag onica. 



2. Area darwini (Cucttlleza d.). 12. Pkolas patagonica (Martesia p^). 



3. Cardita inczqualis. 13. Trochita sp. (? Infundibulum corrugatunf). 



4. Lucina promaucana. 14. Natica famula (N. avoided). 

 - 5. Fimbria ( ? ) patagonica. 15. Ficula Carolina (Pyrula c.~). 



6. Cardium multiradiatum (C. philippif). 16. Valuta gracilis ( V. gracilior). 



j. Cardium pisum. 17. Valuta dorbigny ana. 



8. Venus darwini. 18. Cancellaria vidali, 



9. Venus patagonica. 19. Cancer patagonicus (Geryon peruvianus). 

 10. Venus Iceviuscula (Dosinia /.). 



Of these 19 species, 16 are represented in our collection; of the rest 

 Venus patagonica and Cancellaria -vidali are well characterized forms, 

 while Fimbria patagonica needs confirmation. Thus we may add safely 

 1 8 species to the Patagonian fauna, which brings the total number up to 44. 



Rochebrune and Mabille in 1 889 added the following species : 



Dentalium patagonicum (D. sulcosum). Turritella elachista. 



Photinula resurrecta. Terebra undulifera (probably T. costellata). 



Turritella cmiteaudi (T. breantiand). 



Only two of these species, Dentalium patagonicum and Turritella cou- 

 teaudi, and the existence of the genus Terebra have been verified, the 

 other species must be regarded as doubtful, owing to the unsatisfactory 

 descriptions. Thus the number of well established Patagonian species 

 would be 47. 



