284 Annals of the South African Museum. 



figured by Boule, Lemoine aud Theveuin* from the " Lower Ceno- 

 mauiau " of Madagascar, may represent au allied form of tins genus, 

 distinguished by more numerous auxiliaries. 



Locality. Mauuau Creek. Cull. Resident Magistrate, Ubombo. 



GEN. SUBSCHLOENBACHIA, iiov. 



Genotype : A. restrains, J. Sowerby, 'Min. Conch.,' pi. clxxiii (Oxford 

 University Museum). 



8. SUBSCHLOENBACHIA PREROSTRATA, iiov. 

 (PI. XXIV, fig. 10.) 



A fragmentary example (No. 4970), consisting of portions of two 

 whorls (completely septate) of a specimen of 160-170 mm. diameter, 

 belongs to a type of Siibschloenbachia that is found in Southern Europe, 

 and to which probably the large example figured by Boule, Lemoine 

 and Theveninf is related, though the latter acquires single costatiou, 

 resembling that of S. stoliezkai, u. nov.,J at an earlier stage. 



The whorl-section at first is wider than high, but becomes quadrate at 

 a later stage. 8. picteti, n. uov., || has a less depressed whorl-section, and 

 shows less coarse ornamentation ; on the other hand, 8. orbiynyi, n. nov.,*[ 

 or at least the French examples that the writer would consider typical of 

 d'Orbigny's form, agree in the more robust ornamentation, but are com- 

 pressed. On the shell there is very distinct spiral striatiou, but the cast is 

 almost smooth. The suture-line has deeper lateral lobes than that figured 

 by d'Orbigny. A peculiar feature is a distinct groove on the umbilical 

 slope (PL XXIV, fig. 10, marked by arrows) of the cast, near the end. 



8. stoliezkai, nov., which has a depressed whorl-section,*" shows 

 the ornamentation of S. aequatoricdis, Kossmat sp., on its inner 

 whorls ; and its near ally, 8. pachys, Seeley sp., is too closely costate 

 and less tuberculate. The depressed examples of the quadrituber- 

 culate perinjiata group (n. nov. = A. inflatus, pars, Pictet & Campiche, 

 pi. xxii, fig. 3 only), and others described in the Angola paper already 

 referred to, are distinguished by their double row of outer tubercles. 



Locality. Middle Branch, Manuan Creek. Coll. W. J. Wybergh. 



* Loc. cit. (II, 1907), p. 50, pi. xi, fig. 5. 



f Loc. cit. (II, 1907), p. 40, pi. ix, fig. 7. 



\ = A. inflatus (Sow.) Stoliczka, loc. cit., pis. xxvii and xxix, fig. 2. 



In fig. 10 of PI. XXIV, the height of the smaller whorl shoiild have been 

 only 27 mm. 



| =A. inflatus, Pictet, in Pictet & Roux, 1847, pi. ix, fig. 6, e.g. B.M., No. 

 C3822 (holotype of species) and No. 62116. 



"i\ =A inflatus, d'Orbigny, 1840, pi. xc, e.g. B.M., No. C901 (holotype of 

 species ; thinner, more distantly, coarsely [and recte-J costate, than S. picteti). 



** Stoliczka, loc. cit., pi. xxix, fig. 2. 



