76 MALLETIA OBTÜSA. 



himself on the Noordwijk-shore. Among them I discovered 

 a very curious specimen, that I could not range under 

 any of the Pelecypoda, known from our coast. The shell 

 was in very good condition, provided with the ligament, 

 with the valves closed, and with rests of the animal within. 

 It proved to be a representative of the genus Malletia^ of 

 which the Leyden Museum does not possess a single spe- 

 cimen. It agreed very well with the description and figures, 

 given by G. 0. Sars in „Bidrag til Kundskaben om Norges 

 arktiske fauna, p. 41, Tab. 19. fig. 3", {rom Malletia obtusa 

 M. Sars. To be quite certain I asked the Bergens Museum, 

 if it would have the kindness of lending me a specimen 

 of that arctic species for comparison. With great cour- 

 teousness Mr. Aug. Brinkmann from Bergens Museum 

 presented two specimens of Malktia ohtusa to the Leyden 

 Museum. They proved that I was right in identifying our 

 specimen with the above named species. Thus Malletia 

 ohtusa M. Sars must be added to the Dutch fauna. 



Leyden Museum, Nov. 4, 1912. 



Notes from the Leyden Museum, Vol. XXX"V. 



