NO. 8 OPINIONS 124 TO 133 33 



Accordingly, Luidki 1839 becomes a subjective synonym of Bip'm- 

 iiaria 1835 '^"d the name of the larval stage becomes the name of the 

 genus. Further, 



Liiidia sarsi is an adult stage. Furthermore, Biplmiaria asterigcra 

 1835, the name of a larval stage, becomes the name of the species now 

 known as Luidia sarsi, since the latter is a subjective synonym of the 

 former. 



The effect is that a larval form (asterigcra) , in which various or- 

 gans important for classification are not yet developed, becomes the 

 type of a genus, in connection with which it is essential to know these 

 undeveloped organs in order to determine the genus and to classify the 

 species, and we have not even the benefit in this case of objective 

 synonyms but only subjective synonyms. Accordingly, the case is 

 much stronger than one would first assume from Dr. Mortensen's 

 presentation. 



Furthermore also, in the echinoderms are recognized various larval 

 stages, Auricularia, Bipinnaria, Brachiolaria, Plutcus, the names of 

 which have become current in general zoology and embryology. To 

 grant to these names the availability as generic names is to assume the 

 risk of confusion (to an extent which cannot possibly be foreseen) in 

 the nomenclature of the echinoderms in systematic zoology and in 

 geology as influenced by paleontology. Here again the case is much 

 stronger than one might assume from a casual study of Dr. Morten- 

 sen's presentation. 



The Secretary recommends that the Commission adopt as its Opin- 

 ion the Summary given above. 



Opinion prepared by Stiles. 



Opinion concurred in by thirteen (13) Commissioners: Apstein, 

 Bather, Chapman, Fantham, Horvath, Ishikawa, Peters, K. Jordan, 

 Richter, Silvestri, Stejneger, Stiles, Stone. 



Opinion dissented from by no Commissioner. 



Not voting, five (5) Commissioners: Bolivar, Cabrera, Handlirsch, 

 Pellegrin, Stephenson. 



