70 



The Molluscan Family Planorbidae 



G. hirsutus, 9 specimens from mouth of Bass Creek, Lake Xipissing, Ontario. Col- 

 lected by Mr. A. LaRocque. 



G. deflect us obliquus, 13 specimens from Lake Chetek, Wisconsin. Collected by 

 F. C. Baker; 6 specimens from Taylors Lake, near Quebec, Canada. Col- 

 lected by Mr. A. LaRocque. 



G. latutomus, 3 specimens from Cedar Lake, Algonquin Park, Ontario. Collected 

 by Mr. A. LaRocque. 



G. convexiusculus, 3 specimens from Calcutta. India, collected bj' Dr. B. Prashad. 



Geographical Distribution. The genus Gyraulus is practically world- 

 wide in distribution, differing in this respect from all other genera of 

 Planorbidae. Specific regions include North America, parts of the West 

 Indies and northern South America, Europe, Asia, Africa, Australia, 

 Malaysia, Fiji, New Caledonia, Philippines, and other islands of the 

 Pacific Ocean. 



Below is given a list of some of the species of Planorbids believed to 

 belong in the genus Gyraulus* Some of these species may be found, on 

 anatomical examination, to belong to other subgenera or genera. The list 

 is probably not complete. 



Species of Europe and Western Asia 



alhus Mliller 

 acronicua Ferussac 

 ancylus West. 

 arcticus M oiler 

 albopersicus Germain 

 borealis Loven 

 hourguignati Moitessier 

 brondeli Raym. 

 capocestianus V. Brus. 

 crossei Bgt. 

 devians Porro 

 drapanauldi Jeff. 

 gredleri Bietz 



he bra if us Bgt. 

 infraliratus West. 

 intermixtuii Mouss. 

 janinensis Mouss. 

 laevis Alder 

 Umnophilus West. 

 numidicus Bgt. 

 piscinarum Bgt. 

 polaris West. 

 regulosus Lindholm 

 socius West. 

 tctragyrus West. 



Species of Australia and Tasmania 



essingtoneiisis Smith meridional^ Brazier 



gilberti Dunker planissimus Mousson 



Species of Africa 



abyssinicus Jickeli 



adansonii J. E. Gray 



aethiopicus Bourg. 



agraulus Boiu'g. 



andcrsoni Ancey 



avakubiensis Pils. and Beq. 



chedeaui Germain 



cockbruni Godwin-Au.sten 



costulatus Krauss 



crmvfordi Melville and Ponsonby 



fouladougouensis Germain 



gardei Germain 



gibbonsi Nelson 

 kigeziensis Preston 

 kisumieiisis Preston 

 lamyi Germain 

 leucochilus Melville 



and Ponsonby 

 niisellus Morelet 

 natcderuiia Krauss 

 sperabilis Preston 

 schweinfurthi Clessin 

 tilhoi Germain 

 toukotoensis Germain 



*In this faunal list, which Mr. Baker had never fully edited, the author's name follows 

 each specific name with disregard for use of parentheses to indicate change from 

 original generic assignment. — H.J.V-C. 



