170 F. R. Cowper Reed—Fauna of the Bokkeveld Beds. 
five species from South America mentioned by Thomas (10), except 
to H. Derbyi, Clarke. The latter species, according to Katzer 
(15, p. 21), has its allies in the Silurian of North America. Haug (11) 
has recorded H. Herscheli from the central Sahara, but Schwarz 
(2, p-. 387) says this fossil comes nearest to the South African 
Hf. agrestis, and that it reminds him more of ZH. obtusus, Sandberger, 
from the Upper Lower Devonian of the Rhine. A species of Crypheus 
has also been recognised by Haug from the same locality. 
No true member of Phacops, sens. str., is known to be present in. 
the Bokkeveld Beds, but in South America a fossil from Bolivia was. 
long ago attributed to Ph. latifrons by Forbes (29), while Ulrich (9) 
has described from the same region a peculiar type, Ph. Dagincourtt, 
with submarginal denticulations to the head-shield. A form compared. 
with Ph. rana, Green, has also been figured by Kayser from Argentina 
(20, p. 284). The South African Zyphloniscus Baini is unique, and. 
its true relations are still somewhat problematical. Proetus malacus: 
is not very satisfactorily known. 
(6) Brachiopoda. 
The Brachiopoda are represented by the following large number of: 
species :— 
Lingula aff. densa, Hall. Rhynchospira ? ef. Silveti, Ulrich. 
LL. sp., Reed. Cryptonella Baini, Sharpe. 
Orbiculoidea Baini (Morr. & Sh.). Cr. ? sp., Reed (? = Oriskania navicella, 
Stropheodonta cf. concinna (Morr. & Sh.). Hall & Cl.). 
Strophonelia sp., Reed. Spirifer antarcticus, Morr. & Sh. 
Orthothetes Sulivani (Morr. & Sh.). (= Sp. Orbignyi, Reed = Sp. ant- 
Chonetes falklandicus, Morr. & Sh. areticus + Sp. Orbignyi, Schwarz). 
Ch. ct. coronatus, Cour. Sp. Ceres, Reed. 
Ch. ef. Arcei, Ulrich. Sp. ct. pedrounus, Hartt (included in 
Ch. aff. setiger, Hall. Sp. antareticus by Schwarz). 
Orthis sp. (?), Reed. Sp. sp.a, Reed (included in Sp. antareticus: 
Lthynchonella (Camarotechia?) sp., Reed. by Schwarz). 
Rensseleria relicta, Schwarz (? = R.sp.a, Sp. sp. 8, Reed. 
Reed). Ambocelia umbonata (Conr.). 
R. cf. confluentina, Fuchs. Retzia ef. Adrient, De Vern. 
LR. hottentot, Schwarz (? Rhynchospira). Leptocelia flabellites, Conv. 
A. sp. B, Reed. Scaphiocelia ? africana, Reed. 
KR. ? sp., Reed. Ptychospira variegata, Reed. 
Trigeria att. Gaudryi, Oehl. Vitulina pustulosa, Hall. 
Lr. (? Rhynchospira) simplex, Schwarz. ? Tropidoleptus carinatus (Conr.). 
Some difference of opinion with regard to the generic position and. 
specific relations of the fossils referred to the genera Zrigeria, 
Lhynchospira, and Rensseleria exists (2) (5), but until better preserved 
specimens are available it does not seem possible to settle the vexed 
questions. In the case of the Spiriferide the separation of some of 
the species is a matter of opinion, but Mr. J. Thomas (10, p. 261) and. 
Mr. E. T. Newton (12, p. 252) have recently supported my contention 
as to the undesirability of separating Sp. antarcticus and Sp. Orbignyi, 
and my attention has also been called to a previous paper by 
Scupin (13) on these very species. Both Sp. antarcticus and 
Sp. Orbignyt of the Falkland Islands are held by him to represent 
only one variety of Hall’s species Sp. arrectus, and for this variety 
