98 



PUPILLIDAE 



Gastrocopta contracta contracta (Say). Figs. A and B, 

 The shell of the typical Gastrocopta contracta is wide and conic, 

 and the upper lamella, which in this species is a combination of 

 the parietal and angular lamellae, is shaped somewhat like the 

 letter L with a tail. This can be seen only by breaking away 

 the outer lip so that the whole of the lamella is exposed. The 

 large, rounded columellar lamella and lower palatal fold are 

 situated far within the aperture. 



Gastrocopta contracta climeana Vanatta. Figs. C and D. 

 The race of Gastrocopta contracta known as climeana is sepa- 

 rated from the typical form by a difference in the upper com- 

 posite, L-shaped lamella. In climeana the L 

 lacks the appendage or tail which is present 

 in contracta contracta. The lip must be broken 

 away to make this lamella clearly visible. 



Only one Illinois locality is known for this 

 race, Dubois, Washington County. Gastro- 

 copta contracta climeana has been considered 

 southern in distribution, its previously record- 

 ed northern limit being Arkansas and Missis- 

 sippi. 



In a record of the Mollusca found in the 

 vicinity of Dubois, A. A. Hinkley {Nautilus, 

 Volume 33, page 14, 1919) lists a variety, 

 Gastrocopta contracta abrupta, stating that 

 Dr. Victor Sterki had proposed the name. 

 This appears to be a nude name, Hinkley's 

 use of the name being the only one known. 

 The original shells from Dubois are in the 

 Museum of Natural History of the Uni- 

 versity of Illinois (no. Z25091). They do not 

 differ materially from the varieties contracta or climeana and 

 appear to be the same as other material from Dubois. 



All of the specimens in the Hinkley collection labeled abrupta 

 upon examination proved to be of the variety climeana, having 

 the characteristic L shape of the parietal lamella. It appears 

 that the name abrupta is a synonym of climeana; the latter 

 variety was first diagnosed in 1911, whereas abrupta was first 

 listed in 1919. 



It would be of great interest to ascertain whether the 

 climeana variety might not be found in southern Indiana or Ohio. 



