236 RECORDS OF THE AUSTRALIAN MDSEDM. 



every stream and waterliole around ilie district. It digs 

 burrows in the wet mud of tlie banks, piling up a small crater 

 of soil at their mouths a couple of inches higli. The other 

 specimens Avhich I identify as this species were obtained at 

 the following localities: — 



(3) — Dandaloo, Bogan River, Central New South Wales. 



(3) — Moree, G wydir River, Northern New South Wales. 



(2) — Forty miles North-west of Collarenebri, Northern 

 New South Wales. 



(2) — Atigeldool, Narran River, Northern New South 

 Wales. 



(I) — Port Darwin, North Australia. 



(6) — King Sound, North West Australia. 



(2)— Locality P 



Gkothelphdsa leichardti, var. plana, vitr. nov. 



(Plate xlii., fig 5.) 



Four examples from North-east Queensland are very 

 different in general appearance to those I have identified as Ct. 

 leichardti, hut 1 am unable to discover any important structural 

 differences to distinguish them. The carapace is much flatter 

 both transversely and longitudinally than in (/. JeichurJti, and 

 the chord of the antero-lateral borders is relatively shorter ; 

 the cervical and gastro-cardiac grooves are somewhat more 

 deeply impressed, and the former diverge more widely than in 

 G. leicliiinUi; the postfroutal prominences are very weakly 

 indicated ; the male abdomen is narrower than is usual in (t. 

 leichardti, the greatest breadth of the third segment being only 

 equal to the combined lengths of the last two. Apart from 

 these features however, I can find no definite character by 

 which this form may be recognised. 



Measurements of the male specimen figured. Length of 

 carapace 23mm. ; breadth of carapace 30^mm. ; fronto-orbital 

 width 19mm. ; breadth of front 7|mm. 



j^acs. — (2) Eureka Creek, Walsh River, North-east Queens- 

 land (flowing into the Gulf of Car[)entaria.) 



(2) — Cooktown, North-east Queensland. 



