THE LAXD CRAYFISHES OF AUSTRALIA. 125 



The abdomen is veiy large and unreduced ; the telson is broad 

 and the tail-fan rounded, well developed, and normal in shape. 

 The abdomen and tail-fan are not at all conspicuously hairy. 



The colour vai-ies from reddish brown to olivaceous grey, while 

 parts of the chela and thorax may be picked out in bright blue 

 and red. 



Localities '. — 



1. Tasmania. In one specimen, a male, both chelae are large 

 and equal in size and shape. There is a peculiar compound tooth 

 on each jaw of the pincer (PI. XXII. fig. 39). This specimen comes 

 from Glenore, near Hageley, Tasmania {Bartholomeio, 29. v. 89). 

 In one male specimen from Launceston, Tasmania (Bc(,7-tholomew, 

 1890), the left chela is enlai-ged and i-esembles that of the above 

 specimen ; the right chela is toothless, small, and slender. A 

 similar specimen, but a female, comes from Mundan Farm, Long- 

 ford, Tasmania {Bartholomeio, 1889). 



2. Warragul, Gippsland. Three male specimens {Kershato, 

 1887, 1888), two with left chela enlarged, one with right. There 

 is a prominent peg-like tooth on the dactylopodite part of the 

 enlarged pincer ; the compound tooth on fixed jaw of pincer is 

 reduced (Pis. XXII., XXIII. figs. 41 & 42). 



3. Near Lake's Entrance, Gippsland. One female specimen 

 {Kershaio, 1887) with two similar chelte without teeth (fig. 40). 

 This type of chela is intermediate in character between the large 

 and small chela of the specimens from Warragul (figs. 41 & 42). 



4. Derby River, Wilson's Promontory {Kershctv), 1905). Three 

 specimens, all with similar and equal chelae. Teeth are present 

 in the pincer, but are reduced in size. • The chela3 are rather 

 elongated in shape. 



A note appended to these specimens states that they build 

 conical mud towers, about 8 to 10 inches high, on the flats. 



5. From banks of Fraser Creek, Oberon Bay, Wilson's Promon- 

 tory {Kershaw, 1905). Similar to the last mentioned, but pincer 

 tends to be less elongated. 



6. Male specimen from Croydon, Victoria {Fulton, 1907), with 

 left chela enlai-ged. Interior of pincer is hairy and without any 

 enlarged teeth. 



7. Female specimen from Fern Tree Gully, with left chela 

 enlarged and small teeth in pincer. 



8. Numerous specimens from Croydon, Victoria, and unnamed 

 Victorian localities, characterised by the presence of a thick pad 

 of fine downy hairs on the inner sui'face of the chela (PI. XXV. 

 fig. 45), and also a thick covering of downy hairs on the third 

 maxillipedes. This constant character is possibly of specific A^alue, 

 and it might be advisable to separate these forms as a distinct 

 species ; but they do not apparently show any other difierences to 

 distinguish them from the typical E. cibnicularius. It is a re- 

 markable fact that an exactly similar downy pad occurs in some 

 species of Chceraps. 



