Mr. Burnett's Illustrations of the FissipedSy 3^c. 365 



each containing but two known species, are all that have been 

 as yet discovered belonging to this order; llliger indeed sug- 

 gests a query as to whether the Pamphractus, comnnonly con- 

 sidered as a testudo, may not properly be associated here ; 

 doubtless, future investigations will add niany to the present 

 list : for those already known appear to indicate two separate 

 types ; to which system would assign appropriate names, say 

 Fissipeda or Fissipeds, and Remipeda or Remipeds, the echidna 

 having the digits cleft and free, while in the orniihorhynchus 

 they are connected by a membrane giving them an oar-liUe 

 faculty which greatly facilitates their motion in the water. 

 These consequently have been adopted as denominations for 

 the types ; but were it not for what Latreille has called the 

 supremacy of system, perhaps as so few are known, it might 

 have been as well to include the whole in one division, the 

 Rept-avi-peds. 



Order^ Hkrpornither.e, Herpornitheres [Monoiremata, Reptantic^ 

 AsitthcB, Atthis, Atitthcc, Reptavipeda, Reptavipeds, Reptile- 

 bird beasts, S^c. <^c.] Four freely exserted limbs; digits 

 armed with nails or claws ; no true teeth ; horny bill ; no 

 fleshy lips ; cloaca ; mammae absent or unknown ? 

 T^pe, Fissipeda (Fissipeds, or Cleft-footed Beasts); digits separate 

 ^^A^,i body aculeous. >.>«? ^i .^ 



Kind, EcHiDNiD.E, (Echidna-kind.) Tongue extensile. 

 Type, Remipeda (Remipeds, Oar, or Paddle-footed Beasts.) Digits coi^ 

 nected by a web ; body hairy. f:-h4 



Kindt Ornithorhynchid^ (Ornithorhynchus kind.) Tail horizontally 

 flattened. 



*K Order. Types, Kinds. Genera. Spedeit 



r Hystrix. 



<■ Fissipeda. Echidnidse. Echidna. 



HeRP0IINITHSR2E.< 



.Setosa. 

 (Fuscus. 



^, vRemipeda. Oraithorhyachidae. Ornithorhynchus.^ 



'^ ' Uufus. 





