174 Rev. O, P. Cambridge on some new 



The maxilUe and labium (wliose form is described in the 

 generic characters above) are of a very pale dirty yellow- 

 brown colom- ; the sternum is rather darker. 



The ahdomen is oblong-oval and of a somewliat cylindi-ical 

 form ; it projects slightly over the base of the cephalothorax ; 

 its colour is a dark blackish brown, finely mottled (in spirit of 

 wine) with yellowish points ; a largish patch on the upperside 

 just above the anus is of a pale yellowish colour. The pecu- 

 liarity of the spinners, which are four in number, has been 

 sufficiently described above among the generic characteristics ; 

 they are of a yellow-brown colour, the imderside of the abdo- 

 men being dull whitish yellow-brown. 



A single example (minus all the legs and apparently a 

 portion of the longer spinners) was received in the present 

 year (1874) from Mr. H. H. B. Bradley, by whom it was 

 found on iShelley's Flats, Australia. 



I have placed it provisionally in the family Agelenides, 

 with which, by its long inferior spinners and the form of the 

 digital joints of the palpi, as well as the position of the eyes, 

 it has considerable affinity. Generically, however, it is very 

 distinct from any hitherto characterized genus. The position 

 of the inferior pair of spinners is, as far as I am aware, only 

 paralleled in one other instance — that of Lijjhistius desidtor 

 (Schiodte), in which, from an example in the British Museum, 

 all the four spinners are in a similar position. Schiodte 

 appears to have overlooked these, and describes that curious 

 Theraphosid as without any spinners at all. 



Family Gasteracantliides. 



Nov. gen. Calydna. 

 Characters of the Genus. 



Cephalothorax J from above, quadrate, nearly as broad as long, 

 moderately convex above ; upperside of fore part of caput pro- 

 jecting ; a deep horizontal transverse cleft or chasm on each 

 side divides the upper part from the lower, the lower being 

 again divided in the middle by a longitudinal cleft ; these 

 portions, being thin, llattish, transparent, and angular, hardly 

 appear at first sight to be integral parts of the cephalotho- 

 rax, having more the appearance of being corneous projec- 

 tions connected with the base of the falces, over which they 

 stretch forwards. 



Eyes eight, in three groups ; fom* central eyes close together 

 at the extreme point of tlie upperside of the caput form a 



