BY E. F. HALLMANN. 265 



became apparent, at a late stage of the investigation, as a result of 

 accumulated circumstantial evidence, and have been responsible 

 for the chief difficulties which the task of revision has presented. 

 The alterations in nomenclature which have been found neces- 

 sary in connection with the species revised are indicated in the 

 lists given below. In the first list, the left-hand column gives 

 the names under which the species were described or figured in 

 the "Catalogue," and the right-hand the names of the species as 

 now^ accepted. Where the original name is preceded by the 

 sign t, it is intended to indicate that the species described by 

 Whitelegge under that name w^as wrongly identified; the correct 

 name of the latter species is given in the second synonymic list. 

 In the case of each of the species whose name is followed by the 

 sign + (only), there is good reason to believe that the original 

 description was based upon two species, only one of which is w4th 

 certainty known. The single asterisk(*) placed before several of 

 the names indicates a doubt as to whether the specimen ex- 

 amined was a genuine example of the species — and, accordingly, 

 a doubt as to whether the name is really correct. Finally, the 

 double asterisk(**) is employed to denote that the species is 

 known only from its description; and where in addition the 

 name is enclosed within brackets, the description is regarded as 

 insufficient, even if it be correct, to enable one to say positively 

 to what genus the species belongs. Certain of the last-mentioned 

 species were referred to in my previous paper, and assigned 

 doubtfully to the genus Wilsonella; but I now consider it better 

 to allow them to remain under their original names. 



List A. — Synonymy of the Species, as far as revised by me, of 

 Lendenfeld's "Catalogue.' 



Tethya multistella var. **Donatia lyncurium (?) var. multi- 



megastella stella. 



Tethya multisteUa var. **T)onatia lyncurium (?) var. 'micro- 



microstella stella. 



Tethya corticata. *Donatia ingaUi var. Javi.'^. 



Tethya fissurata Donatia fissurata. ^^ 



Tethya inflata "^Donatia inijalU var. IcBvis. 



Tethya phillipensis Donatia phillipensis. 



Tethya Icevis Donatia ingaUi var. la:i 



