556 Annals <>/' the Smith African Museum. 



cit., p. 209, PL LXXXIV, figs. 15-20. (Syn. : C. subpunctulatum, 

 Nordst.). 



Samples 25, 26, 29, 29a, 30a. 31, 33, 48. 



Long., 25-26 ^ ; lat., 21-22 fi ; lat. isthm., 7-8 ,x. 



The dimensions are rather smaller than those typical for this variety. 

 Most of the specimens, which were in no case numerous, possessed 

 the form shown in Fig. 17 on PI. LXXXIV of Messrs. West's 

 monograph, the apex being generally quite or almost quite smooth. 



13. Cosmarium subcrenatum, Hantzsch ; W. & Or. S. West, op. rit., 

 di. 1908, p. 228, PL LXXXVI, figs. 10-14. 



Samples 26, 31, 32, 33,48. 



Long., 28-38 /x ; lat., 25-30 /x ; lat. isthm., 7-11 /x (usually about 

 9 /x). In some of the individuals the apical undulations were rather 

 indistinct. 



14. Cosmarium subprotumidum, Nordstedt ; W. & Gr. S. West, up. 

 rit., iii, 1908, p. 231, PL LXXXVI, figs. 19-21. 



Var. gregorii (Roy & Biss.), W. & G. S. West, loc. of., p. 232, 

 PL LXXXVI, figs. 23-25 (Syn. : C. gregorii, Roy £ Biss.). 



Samples 14, 21 (?), 33. 



Long., 21-24 /x; lat., 21-22 /x ; lat. isthm., 0-7 /x. Typical specimens 

 closely resembling Fig. 24 in Messrs. West's monograph. The 

 type has been recorded from the Tanganyika region by Gr, S. West. 



15. Cosmarium speciosum, Lundell, Desm. Suec, loc. rit., p. 34, 

 Tab. Ill, fig. 5; W. & G>. S. West, op. rit., iii, 1908. p. 247, PL 

 LXXX1X, figs. 1-3. 



Var. simplex, Nordstedt, Desm. Spetsberg., etc., Of vers. K. Sv. Vet.- 

 Ak. Foerhandl, 1872, No. 0, p. 31, Tab. VI, fig. 12 ; W. & G. S. West, 

 loc. cit, p. 250, PL LXXXIX, fig. 6. 



Sample 50 (rare). 



Long., 36-42 ju,; lat., 27-30 /x ; lat. isthm., 12-15 /jl. 



16. Cosmarium botrytis, Menegh. ; W. A: 01. S. West, op. rit., iv, 

 1912, p. t. PL XCVI, figs. 1. 2. 5-15. 



Samples 5, 25, 29, 30a (here iu part approaching var. depressum, 

 W. & a. S. West), 33. 



Long., 62-73 /x ; lat., 55-63 /x ; Lit. isthm., 17-18 /t. Recorded from 

 the Karoo by Gr. S. West. 



Var. tum'nlum, Wolle, Desm. United States, 1884, }>. 7">, Tab. XVII, 

 figs. 3-5; W. A a. S. West, tor. nt., p. 5, PL XCVII, figs. 2. 3. 

 (Syn. . C. subbotri/tis, Schmidle). 



Samples 29, 29a, 31. 



Long., <io-72 i>. ; lat.. 54-60 /x : lat. isthm., 15—16/*. 



