266 EEV. O. p. CAMBRIDGE ON NEW SPIDERS, 



of Sydney (who has already sent me some very remarkable species 

 yet to be worked out), is now actively engaged in studying and 

 collecting the Spiders of his neighbourhood ; and we may therefore 

 look forward confidently to some information from him as to the 

 habits &c. of some of these new forms. To Mr. Bradley I am 

 indebted for the only information yet obtained as to the habits of 

 the new genus now described, Thlaosoma, though the value of this 

 information is chiefly negative, i. e. merely enabling me to exclude 

 the genus from the family Epeirides, to which Dr. Ludwig Kocli 

 of Niirnberg supposes it to belong. 



The remaining Spider described in the present paper, Phoron- 

 cidia Thwaitesii, captured in Ceylon by Mr. Q-. H. K. Thwaites, 

 is chiefly interesting as being a second species of a genus many 

 years ago established by Professor Westwood, and, as I appre- 

 hend, including the only known species of the family Theri- 

 dides, whose abdominal cuticle is corneous and furnished with 

 spines : Mr. Thwaites is as yet unable to give me any account of 

 its habits. 



Class ARACHNIDA. 



Order Araneidea. 



Family MYaALIDES. 



Genus Eriodon (Latr.). 

 Syn. Gen.: — 

 Eriodon, Latr. Nouveau Dictionnaire d'Histoii-e Naturelle, torn, xxiv. 



p. 134 (1804). 

 Missulena, Walk. Tabl. Des. Ar. p, 8, pi. 2. figs. 11 to 14 (1805). 

 Eriodon, Latr. R^gne An. de Cuv. (1817). Gu^rin, Iconographie du 

 Rhgne Animal, pi, 1. fig. 1 (1828). Latr. Mgne An. de Cuv. 2nd edit. 

 (1829). 

 Missulena, Walck. Insectes Apt. i. p. 252 (1837). 



Eriodon, Lucas, Hist. Nat. des Crust, de France, des Arachn., des Myria, 



^c. torn. i. p. 347 (1842) ; An. de la Soe. Entom. 4^ serie. Bullet, torn. ii. 



p, 43 (1862). E. Simon, Hist. Nat. des Araign. p. 91 (1864), Lucas, 



Annales de la Soc. Ent. de France, 4« serie, torn. v. pi. 8. p. 309 



(1865). 



All the above refer to but one species, Eriodon (Missulena) 



occatorius, captured in New South "Wales. No other species, as 



far as I am aware, has hitherto been recorded ; the present addi- 



