86 The Molluscan Family Plaiwrbidae 



Genus AFROPLANORBIS Thielc, 1931 

 Type by original designation Planorbis siidanicus Martens 



1885. Mcnetus Westerlund (non H. and A. Adams, 1855), Fauna Palaearc. Reg., V, 

 p. 64. No type cited. As subgenus of Planorbis. 



1902. Menetus Westerlund, Rad. Jugoslav. Akad., 151. p. 120. Tvpe Planorbis boissyi 

 P. and M. (non Adams, 1855). 



1923. Planorbulina Germain, Rec. Ind. AIus., XXI, p. 179. Citation for Planorbulina 

 Jickeli (1874) Fauna der Land und Siisswasser Mollusk Nord-ost-Afrika. 

 Dresden, p. 221 ('pour la Planorbis alexandrinus Ehrenberg {Segmentina sous- 

 genre Planorbulina)') . 



1925. Planorbula Connolly, Trans. Royal Soc. S. Africa, XII, p. 195 (non Haldeman). 

 Anatomy of Planorbis pfeiffcri Krauss. 



1931. Ajroplanorbis Thiele, Handbuch, Teil 2, p. 480. Type Planorbis siidaniciLs von 

 Martens. As section of Planorbis. 



1934. Ajroplanorbis Pilsbry, Proc. Phil. Acad. Nat. Sci., 86, p. 55. Type Planorbis 

 sudanicus von Martens. 



1936. Ajroplanorbis Ha.\s, Abh. Sencken. Natur. Gesell., No. 431, p. 25. Type Planorbis 

 sudanicus von Martens. As genus. 



1939. Planorbulina Haas. Malac. Notes, Field Mus. N. H., Zool., XXIV, p. 100. Cita- 

 tion from Jickeli 1874, Nova Acta Acad. Leop. Carol., XXXVII, p. 221. 



1939. Biomphalaria Connolly (part); Ann. South African Mus., XXXIII, part 1, 



p. 483. 



1940. Planorbulina H.\as, Nautilus, p. 33. States that citations from Jickeli's paper 



(1874) are erroneous, there being no reference to this name in the work 

 mentioned, the name used being Planorbula. Planorbulina was used by 

 tl'Orbigny in 1826 in Foraminifera. 



Shell (plate 81, figs. 2, 3). Small to medium size, orbicular, of few or 

 many whorls which may be closely coiled or rapidly increase in diameter; 

 usually flattened on both sides; aperture rounded, usually in the same 

 plane as the last whorl, lips sharp, the aperture with or without lamellae. 



Animal. Not observed. 



ANATOMICAL CHARACTERISTICS 

 PLATE 71 



GENITALIA. Male Organs (fig. 9, Ajroplanorbis pfeifferi (Krauss) ). 

 Seminal vesicle occupying about half the length of the ovisperm duct, the 

 glandular follicles short and projecting from the side of the duct. Sperm 

 duct a narrow tube about as long as the ovisperm duct and seminal vesicle 

 combined. Prostate short, composed of five main branches each of which 

 branch again two to four times, thirteen diverticula showing at the upper 

 or outer end of the prostate. From the figure the diverticula appear to be 

 arranged in fan-like manner. There is but one series of diverticula but there 

 is no indication of a separate prostate duct. The vas deferens is a long, fine 

 duct, apparently as long as the sperm duct and ovisperm duct combined. 



The penial complex has a sac-like preputium with a narrow retractor 

 muscle attached to the summit near the junction of preputium and vergic 

 sac. The vergic sac is a narrow tube, not much greater in diameter than the 

 vas deferens. It is about as long as the preputium and appears from the 

 figure to be slightly enlarged at the end. The features of the interior of the 

 penial complex are neither figured nor described. 



Female Organs. The spermatheca is an elongated pouch connected with 

 the rather long vagina by a duct half as long as the spermatheca. The 



