290 FOSSIL PLANTS FROM THE [May I903, 



One of these [V 7595] is a piece of petrified wood from a coal-seam. 

 Such specimens are stated to be very numerous in this coalfield. 

 The other two specimens belong to a typical European genus of 

 Carboniferous age. One of these [V 7594] is a portion of a stem 

 which measured 12 inches across, and occurred above the coal in 

 this coalfield. The stem bears a number of vertical ribs, and 

 recalls the structure of a decorticated stem of Sigillaria. This con- 

 clusion is confirmed by the occurrence of a faintly-marked leaf-scar 

 of the Sigillarian type on one of the ribs, and there is little doubt 

 that the specimen is a Eu-Sigillarian stem of the Rhytidolepis- 

 type. The remaining specimen [V 7596] is of a similar nature. 



The collection from the Tuli and Sengwe Coalfields is too small 

 to offer any evidence as to the horizons of the beds. Coalfields, 

 with floras for the most part specifically identical with those of 

 European Upper Carboniferous rocks, are already known, both to 

 the north-east of Rhodesia, in the Tete 1 Coalfield of the Zambesi, 

 and to the south, in coalfields in the Cape Colony 2 : in both of 

 these Catamites is stated to occur. On the other hand, Sigillaria 3 

 occurs in South Africa in association with the Glossopteris-Hora,. 

 The occurrence of typical European Coal-Measure plants in the 

 above-mentioned coalfields, without any trace of members of the 

 Glossopteris-ftoY&) is very remarkable, and has an important bearing 

 on the question of the exact age of the Glossopteris-he&ring rocks in 

 South Africa and elsewhere. It is therefore highly desirable that 

 we should know more of the floras of the various coal-bearing basins 

 in South Africa. 



EXPLANATION OF PLATES XIX & XX. 



Plate XIX. 

 Fig. 1. Main section, from Bulawayo to the Zambesi .River. Horizontal scale : 

 about 9^ miles = 1 inch. 



2. Section from the Siuanombi gold-belt to the Sesami Coalfield. Hori- 



zontal scale : about 9^ miles=l inch. 



3. Section from the Lubu Coalfield to the Zambesi River. Horizontal 



scale: 4miles=:l inch. ['Syarira' in this section should be spelt 

 ' Sijarira.'j 



4. Section from near Macloutsie to Mokoro. Horizontal scale : about 



9^ miles =1 inch. 



Plate XX. 

 Acrolepis Molyneuxi, sp. nov., from the Permo-Carboniferous of the 

 Sengwe Coalfield, Southern Rhodesia. [Brit. Mus. No. P 9840.] 

 Fig. 1. Right lateral aspect of imperfect head and abdominal region, about two- 

 fifths nat. size : 6r. = branchiostegal rays ; pcz^base of pectoral fin. 



2. Imperfect tail of another individual, about two-fifths natural size. 



3. Some principal flank-scales, outer aspect, natural size, displaced to show 



the overlapped portion. 



4. Flank-scale, inner aspect, natural size, imperfect at the digitate hinder 



margin. 

 Figs. 5 & 6. Ventral scales, outer and inner aspects respectively, natural size. 



1 Zeiller, Ann. des Mines, ser. 8, Mem. vol. iv (1883) p. 594. 



2 Grey, Quart. Journ. Geol. Soc. vol. xxvii (1871) p. 49. 



3 Seward, ibid. vol. liii (1897) p. 315. 



