IREDALE : ON INVALID GENERIC NAMES. 177 



previously in another sense ; also Pupoides of this introduction has no 

 status, and does not invalidate the later Pupoides, 2:)roperly proposed by 

 Pfeiffer (Mai. Blatt., i, p. 192, 1854), as suggested by Connolly, loo. cit. 

 It is interesting to note that when Pilsbiy (!Man. Conch., ser. ii, 

 vol. ix, p. 248, 1894) used Ileliomanes, l^^o(}uin-Tandon, 1855, as 

 a sectional name, he wrote " Heliomanes (Fer., Tabl. Syst., not used 

 in a generic or subgeneric sense) ", a conclusion with which we agree. 



The genus-name Miodon and its substitutes. 



Some years ago I noticed the following paragrapli in tlie Nautilus, 

 vol. xvi, p. 143, April, 1903: "In the revision of the Carditacea, 

 lately printed by the Academy of jN^atural Sciences, I preserved the 

 mxxnQ- Miodon for a form of Venericardia, found on the Pacific coast, 

 and applied by Carpenter in 1864. For Miodon, Sandberger, 1870, 

 given to a fossil form of Cyrena, tlie name Jliodotitopsis was proposed. 

 In Sliarp's Index Zoologicus, just received, I find Miodon, however, 

 was used for an Ophidian in 1859 by Dumeril, and therefore 

 Carpenter's shell will have to have a new name also. In this case 

 I would propose 2Iiodontiscus for the Venericardian. W. K. Dull." 



Admittedly uninterested, these remarks remained unwanted in my 

 mind until a casual reference to Fischer's Manuel de Conchyliologie 

 brought them back in connexion with the following sentence 

 (p. 1187), the last words in the Manuel concerning Pelecypodes : 

 " Coripia, de Gregorio, 1884. Ce genre, qui a pour type le Cardita 

 cordis, Philippi, du Tertiaire superieur, passe dans la synonymie de 

 Iliodon, Carpenter, 1864 (p. 1011), genre qu'il ne faut pas confondre 

 avec une section des Cyrena nominee Miodon par Sandberger et dont 

 on devra clianger I'appellation en Neomiodon, Fischer, 1887." This 

 would indicate that both Dall's names must be superseded as follows : 



Neomiodon, Fisclier, Man. de Conch., p. 1187, 1887, 

 will replace Miodontopsis, Dall, Nautilus, vol. xvi, p, 143, April, 

 1903, and 



Coripia,' De Gregorio, Bull. Soc. Malac. Ital.,vol. x, 1884, p. 153,1885,* 

 will displace Miodontisciis, Dall, Nautilus, vol. xvi, p. 143, April, 1903. 



Tritonidea, Swainson. 



In these Proceedings (vol. x, p. 221, 1912), when introducing the 

 genus-name Quoyula, I pointed out that Pollia dated from 1834, not 

 1839, as usuallj- accepted, and that its type, when first proposed, was 

 by monotypy " Triton tmdosus, Lam." In consequence Pollia was 

 exactly equivalent to and antedated Tritonidea. Swainson, 1840. 

 Since that date Tritonidea has still been used, so that I have thought 

 it necessary to emphasize its invalidity whilst making a further 

 contribution to this subject. 



I have recently actjuiied a nice copy of Swainson's Treatise on 

 Malacoloyy, which is noteworthy in that the purchaser has inscribed 



^ A sub-genus of Cardita, for Cardita (Coripia) tmidentata, Basterot = cordis, 



Philippi. 

 " In this work many unrecorded names appear. I have noted Elegantula, 



Anfilla, Linga, Pirtiis, Timbellus, Aphis, and Algrus. 



