Monographic List of G aster acantlia. 175 
100. G. guttata. 
Gasteracantha guttata, Thorell, Ofvers. Vetensk. 
Akad. Forhandl. xvi. p. 302, n. 10 (1859, edit. 
1860); Eug. Resa, Zool. Araclin. p. 19 (1868). 
" Malacca " {Kinherg), Thorell. 
Seems to belocg to the G. mammosa group. 
Sub-genus Teicantha, Simon. 
101. G. tricuspidata. 
Plectana tricuspidata, Blackwall, Ann. and Mag. 
Nat. Hist. S. 3, vol. 11, p. 38 (1863); Tricantha 
tricornis, Simon, Hist. Nat. des Araign. p. 293, 
fig. 136 (1864). 
" Rio Janeiro," Blackwall; Venezuela, Birschell. B.M. 
A very remarkable little species. 
Sub-genus Dicantha. 
102. G. lata. 
Epeira lata, Walckenaer, Tableau des Aran. p. 
66, n. 61 ; Apt. 2, p. 165, n. 23 (1837> 
** Guadeloupe," Walckenaer. 
A curious species with only two spines on the abdomen. 
103. G. tetraedra. 
Plectana tetraedra, Walckenaer, Apt. 2, p. 166, 
n. 24 (1837. 
Hah.—'i 
Sub-genus Arangethra. 
Abdomen corneous, semicircular, entirely surrounded by 
subconical spines or teeth more or less prominent, about 
twenty-six in number; six central and tAventy-three sub- 
marginal impressed spots, the latter at regular intervals, 
with the exception of two on each side forming pairs 
opposite the ninth to tenth tooth from anterior median 
sinus; cephalothorax much expanded in the centre, and 
crossed by three prominent rounded tubercles ; falces rather 
short for the genus. Type, A. Cambridgii. 
104. G. Cambridgii, n. sp. PI. IV. fig. 8. 
Female ; length of abdomen 7 lines ; breadth at widest 
part, excluding spines, 1 inch ; entire length 8 lines ; 
general length of spines 1 line. 
Cephalothorax described above ; eyes of central promi- 
nence, almost equidistant ; abdomen semicircular, sinuate 
behind cephalothorax, with three central large depressions 
