Annals of the Transvaal Museum 
107 
ADDENDUM I 
Acantho don flaveolum Poc. 
The adult male of the typical form of flaveolum was taken recently in 
Grahamstown by Mr J. van Dam (15. ix. 1918). Frontal eyes about L of a 
diameter apart, the anterior ocular quadrangle wider behind than in front, 
the ocular area approximately J as long as the distance from the anterior 
margin of the carapace to the fovea. All the tarsi scopulate: tarsus I with a 
spine on each side. Metatarsus I only very slightly longer than tibia I, and 
only slightly curved near the base, but without distinct incrassation at any 
point: on the inner surface of the segment there are no distinct bristles, but 
stiffish hairs occur, and towards the apex are two long spines. Excavation of 
tibia of palp with a continuous semicircular group of spinules or short spines, 
the basal portion being best developed : altogether, there are about thirty 
such spinules. Carapace 4 mm. long. 
ADDENDUM II 
Spiroctenus londinensis sp. nov. 
I have recently received specimens of a closely related species from 
Hogsback, Amatola Mts., also collected by Dr G. Rattray. These are pre- 
sumably referable to Hermachastes flavopunctatus Pure. ( Annals S. Af. Mus. 
hi. p. 98, 1903). The species is evidently a member of the Bessia group. Its 
dentition resembles that of londinensis . There is an inner row of about thirteen 
teeth arranged along a curved line, and a basal group of very minute teeth 
on the outer side. Patella III has usually three spines on the anterior surface, 
sometimes four, or even only two: immature specimens of londinensis may 
also have three spines on this segment. The Hogsback females are consider- 
ably smaller than adults from East London, the carapace being only 6-4 mm. 
long: in a specimen of similar size from East London the hairs of the ab- 
dominal surfaces are much longer and stronger than in flavopunctatus , but 
otherwise the two seem much alike. 
ADDENDUM III 
(With i text figure.) 
In reply to Mr Tucker’s criticisms 1 of my statements and conclusions on 
spider systematics : 
p. 79. He is correct in objecting to the association of Moggridgea seticoxa , 
coegensis and nigra under the heading “Coxa II with a distinct posterobasal 
group of shorter an$ more densely crowded (often spiniform) setae interiorly. ” 
The original MS read Coxa III (not II). The alteration was made by the 
printer. I may add that the whole paper (in Annals Transvaal Mus. vol. v. 
no. 2) is stultified by numerous quite palpable printer’s errors, no proofs 
having been submitted to the writer. 
1 “On some South African Aviculariidae (Arachnida). Families Migidae, Cteni- 
zidae, Diplotheleae and Dipluridae.” By R. W. E. Tucker, B.A., in Annals S. 
African Mus. vol. xvn. pp. 79-138. It is an important paper, and well illus- 
trated. In quoting from that paper the italics are mine. 
