Monograjjhic List of G aster acantJia. 161 
Pachebon, Siam, Stevens. B.M. 
Remai'kable for the length of the posterior spines. 
25. G. formosa. 
G aster acantlia formosa, Vinson, Aran, de la 
Reunion, p. 315, n. 62 ; pi. 9, fig. 7, var. (1863). 
Madagascar, IdaPfeiffer. B.M. 
26. G.'nana, n. sp. PI. IV. fig. 4. 
Female ; length of abdomen 2 lines, breadth at widest 
part, exchiding spines, 3 lines ; entire length 1^ lines ; 
posterior lateral spines 1^ line, anterior ^ of a line ; of 
posterior margin |^ of a line. 
Cephalothorax normal ; abdomen form of G. formosa, 
with six angles bearing the spines ; two on anterior lateral 
margin acute, very short, directed obliquely forwards ; 
two on posterior lateral margin five times as long, acute, 
directed slightly backwards ; and two short, acute, diver- 
gent, on posterior margin. 
Cephalothorax, falces, maxillae, labium, sternum and 
legs ochraceous ; abdomen smooth, testaceous, with four 
central and eighteen marginal impressed castaneous spots ; 
spines castaneous, rugose, pilose ; ventral surface black, 
spotted with testaceous in the centre, but testaceous round 
the margins, and exhibiting impressed spots at base of 
lateral spines ; black conical projection as usual. 
Congo. 1 specimen. B.M. 
27. G. versicolor. 
Plectana versicolor, Walckenaer, Apt. 2, p. 161, 
n. 18 (1837). 
" Caffraria," Walckenaer ; Sp. ead. ? Pt. Natal, Stevens. 
B.M. 
28. G. violenta. 
$ Gasteracantha violenta, Koch, Arachn. Austral. 
1, p. 5, -a. 5; pi. 1, fig. 3 (1871). 
"New Guinea," Koch; Australia, Port Macquarie, 
Falkland Isles. B.M. 
Our dried examples of this species are much broken, and 
show no trace of the dark bands mentioned in Koch's 
description ; in form they agree Avell with his figure ; but 
the large depressed spots of the second series seem rather 
continuous with the first than the third series, as in G. 
tcEuiata. 
