486 Dr. S. Woodward — Hadimima from Brazil and the Cape. 



III. — Note on the genus IIasti.mima fkom Bkazil and the Cape. 

 By Henky WoorwARU, LL.D., F.R.S. 



PEOFESSOR SEWAED has called my attention to Pigs. 5 and 6 

 on Plate XXVIII, which accompanies his notes on Fossil Plants 

 from Cape Colony. These fragmentary impressions of organic remains 

 have been compared by him with similar doubtful plant- remains 

 figured by Dr. David White from the Coal-measures of Brazil (see 

 Commissao dos Estudos das Minas de Carvao de Pedra do Brasil, 

 Estampa x and xi. Eiual Eeport by J. C. White, Eio de Janeiro, 

 1908, p. 589.) Dr. White had already doubted the vegetable nature 

 of the specimens from Brazil, which doubt is shared by Professor 

 Seward, but the latter expresses himself more definitely against the 

 plant-nature of Figs. 5 and 6, PI. XXYIII, from the Witteberg 

 Series of Cape Colony. He has, in fact, suggested that they 

 "represent part of a body-segment of a Eurypterid." In this opinion 

 I cordially agree. I also wish to add a word about the specimens 

 figured under the name of Sastimima by Dr. David White from the 

 Coal-measures of Brazil. 



In this Memoir, on pi. x, five figures are referred to as Sastimima 

 Whitei, namely, figs. 1 and 2, which appear to represent, prohahly, 

 the impression and counterpart of an imperfect thoracic segment of an 

 Arthropod, the lateral and posterior margins of which are readily to 

 be seen, and the latero-posterior angle which they form is slightly 

 produced and falcate as shown in the body-segments of Pterygotus 

 anglicus, drawn on pis. i and ii, fig. 1, of my monograph on the 

 Merostomata (Pal. Soc. Mon., 1865). The iisual scale-like markings, 

 however, are only seen near the margins of fig. 1, and are represented 

 enlarged four times in fig. \a of Dr. White's plate. The rest of the 

 segment is ornamented by a series of small, short, bluntly-rounded 

 spines, sparsely distributed over the surface and pointing towards the 

 posterior border. They are shown in relief in fig. 1 and as depressions 

 on the surface in fig. 2 of pi. x. Figs. 3 and 4 on the same plate also 

 represent the impression and counterpart of another portion, most 

 probably of the same animal, as the scabrous surface-ornamentation 

 is of the same kind, being in relievo on one half (fig. 3) and in intaglio 

 on the other (fig. 4). This specimen, which is rather acutely hastate 

 in form, may represent the ' telson ' or tail-spine of a Pterygotus, the 

 margins, as far as preserved, are bilaterally symmetrical, and there 

 is a median ridge On fig. 3 and a corresponding depression on fig. 4. 

 It is too regular and pointed to have been the spatulate extremity of 

 one of the swimming-paddles, and cannot be a leaf, although no doubt 

 at first supposed to be one. The scabrous ornamentation on these 

 specimens agrees very closely with that of Eurypterus punctatus, 

 Salter, sp., from the Lower Ludlow Beds, Church Hill, Leintwardine.^ 

 A similar ornamentation is observed on the segments of a large form 

 I'eferred to Echinocaris WrigJitiana, Dawson, sp. (Jones & Woodward, 

 Geol. Mag., 1884, p. 393, PI. XIII, Figs. \a, U. Woodcuts of 



1 For drawings of E. punctatus, Salter, sp., see H. "Woodward's Monograph ou 

 the Merostomata, 1872, pt. iv, p. 153, fig. 51 ; p. 157, etc. 



