325 



of the shell with irregular wavy raised lines (fig. 125). Head 

 large, covered with undivided skin, snout prominent, ending 

 in a fleshy, thick proboscis, bent 

 downwards; nostrils situated supe- 

 riorly; eyes lateral; neck short. Limbs ^-^'^r^'V-^I-^^^'^S^S 

 flat, webbed to the tips of the digits, 5>^Ct:j;*-'^^-"^;j^ V-<^^ 

 with two claws; fore limb longer ,V' ^ 1"^ f, '" '■ — -L-.'1-^^^l 



- N. 



than hind limb, with 7 — q broad '^ .■.-^-'-^^ -^ r^l-'-'-^Tv^^,^ 

 transverse band-like scales anteriorly ^;^:£^5ft5^^M!Sl 

 and three to four transversely en- 

 larged scales at the posterior margin. ^'S- ^^5- 



T^ ., , , .,, ^ , Carettochelys iiisculpta Ramsay. 



iail short, with 14 — 10 curved ^ ^ r . , , ^ ^ • 



' ^ Fragment of costal plate, nat. size. 



shields above. 



Brown above and below. Length of shell 495 mm. 



Habitat: New Guinea (Strickland river, Dameracura and 

 Kiwai Island at the mouth of the Fly river, Morehead river, 

 Merauke!, Lorentz river!, Stekwa river!. Lake Jamur!). 



The female deposits 17 — 27 round eggs (fig. 102^). 



7. Fam. Trionychidae. 



No epidermal shields on the carapace and plastron, but skin 

 covering them. Head and neck completely retractile; ear 

 hidden; jaws covered by fleshy lips; snout ending in a proboscis. 

 Plastron small, connected with the carapace by skin. Tail very 

 short. Limbs with distinct digits, with three claws. 



Aquatic turtles, living in rivers and ponds; Peloclielys enters 

 the sea. Carnivorous. 



Nom. in dig. Labi labi. 



Key to the Indo-Australian genera. 



A. Plastron without cutaneous valves. 



I. Orbit nearer the temporal than the nasal fossa; 

 proboscis long. 



a. The 8 pair of costals separated in the middle by 



the neurals; postorbital arch keeled exteriorly . . . i. Dogania p. 326. 

 0. Last pair of costals in contact in the median line; 



postorbital arch flat exteriorly 2. Trionyx p. 327. 



II. Orbit nearer the nasal than the temporal fossa; 



proboscis short 3. Pelochclys p. 331. 



B. Plastron with a cutaneous valve, which may cover the 



hind limb 4. Eniyda p. 332. 



