NAlADES OF MLSSOURl ""3 



Eur. (M.) brevicula (Call), T. Ciirtisi Frierson and Utterback, 

 and T. Lefevrei Utterback. Aside from the morphological synopsis 

 of the nutritive and reproductive parts and also of the external 

 and internal features of the shell the physiological and ecological 

 facts are especially dwelt upon in the miscellaneous remarks. 

 Because of the value of beak sculpture and glochidial characters 

 as bases for classification a special feature is respectivelv made 

 of the studies of juveniles and glochidia. Likewise, for classi- 

 ficatory reasons, a Breeding Record has been kept for the most 

 representative generic types, and, in many instances, more com- 

 plete records have been made than by other observers due to more 

 detailed observations during the winter season. This Record 

 and also the Zoogeograpiiic account of the Missouri Naiades 

 have been carefully kept in tabulated form, but, as these accounts 

 have been reserved thus for other special papers, they will only 

 appear here in extracts. 



In this catalogue eighty species and twenty subspecies are 

 listed. Doubtless this list will be supplemented, although the 

 author has worked the State rather thoroughly in actual field 

 investigations — especially Central and Northwest Missouri — 

 and has examined all species catalogued except the following 

 which have been reported by Missouri collectors: — An. Bealii 

 (Lea). Cy. Aberti Lamarckiana (Lea), Plevi. plenum (Lea), Lamp. 

 Reeviana (Lea) and Lamp. PowellH (Lea). According to a report 

 from the material sent away for identification, this State can claim 

 another species not yet on the list, — a new and undescribed 

 Lampsilis, near to Lamp, hianfiulata (Lea), and will soon appear 

 under the authorship of Mr. Frierson. 



The author wishes to express his thanks to those who have 

 assisted him in this work. Especially is he thankful to Dr. George 

 Lefevre who assigned and directed this work and rendered it 

 possible through his numerous kindnesses and suggestions. 

 Much credit should also be given Dr. W. C. Curtis, the co-worker 

 with Dr. Lefevre, in the University of Missouri, Department of 

 Zoology, where the author gathered much of his data through 

 the facilities of the laboratory, library and museum. Besides 

 the invaluable instructions received, from these two gentlemen, 

 who have contributed so much to the Science of Fresh-water 

 Mussels, it was the author's pleasure to receive many valuable 

 hints in person from Dr. R. E. Scammon, author of "Kansas 



