414 



MR. H. G. PLIMMER ON 



Name. Habitat. 



lilack Stevnotliere [Sternotlirerus W. Africa. 



yiiger'). 

 Hasselquist's Gecko {Ftyodactt/lus Egypt. 



lohatus). 

 2 Speclded Terrapins {Clemmys N. America. 



guttata). 

 Green Tree Viper {Atheris clilor- W. Africa. 



ecMs). 

 Three-keeled Terrapin {Stauro- C. America. 



typus triporcatt(s). 

 Egyptian Gecko {Tarentola aiinu- Egypt. 



laris). 

 Hilaire's Terrapin {Hijdraspis Brazil. 



hilarii). 

 *4 Eyed Lizards (Lacerta oceUata). S. Europe. 



*Niiotic 'HLomtor {Vaj'anus niloticiis). Africa. 

 *2 Cook's Tree Boas {Corallus W. Indies. 



cooki). 

 Green Tree Snake {Dendraspis W. Africa. 



viridis). 

 *2 Kussell's Vipers ( Vipera ri(sselli). India. 



*2 Eryxs {Eri/.v JoJmi) do. 



3 Dahl's Snakes (Zamenis daJili)... S. Europe. 

 *Confluent Rattlesnake (Crofalus N. America. 



confluentus). 

 Glass Snake {OpJiiosaurus apiis) ... S. Europe. 

 Long-nosed Viper (Vipei-a ammo- do. 



dytes). 

 Tuberculated Iguana {Iguana C. America. 



ttiberciilafa). 

 Peloponnesian Lizard (Lacerta S. Europe. 



■peloponnesiaca). 

 Madagascar Boa {Boa madagas- Madagascar. 



cariensis). 

 West African Python {Fiithon Tropical Africa. Medium sized 



seh(e). 

 2 Dark Green Snakes {Zamenis Europe. 



gemone.nsis). 

 Square-marked Toad {Bnfo regn- Africa. 



laris). 



Characters. 



Medium sized. 



Short; cells deformed. 



Short; bulky; nucleus eccentric. 



Long and thin. 



Medium. 



Short, bulky ; cells deformed. 



Long, doubled over. 



Host-cells enlarged and some debaemo- 

 glohinised. Long, thin ; some bottle- 

 shaped. 



Medium, thick. 



Host-cells deformed, short ; nucleus not 

 central. 



Large, often two in cell which is not 

 enlarged. 



Bulky : cells deformed. 



Long, with hooked end. 



Long, thin ; turned over at both ends. 



Long, doubled over. 



Large and granular; host-cells elongated. 

 Bulky ; cells not enlarged. 



Short, stout, sometimes round. 



Short. 



Short, thick ; cells deformed. Schizo- 

 gony found in liver. 



Cells enlarged and dchaemoglobinised ; 



parasites long and thin. 

 Short and very thick. 



The next group is that of tlie Plasmodidse, to which the various 

 malarias belong. 



I have found only one mammal — a Green Monkey— -infected 

 with, malaria, probably Plasmodium kochi. It is uncertain, 

 because I could only get certain stages ; the host-cells do not 

 seem to be greatly altered. 



In tlie birds there are two kinds of intra-corpuscular parasites, 

 the Plasmodium, prcecox and Hcemo-proteus danilewslcyi, which 

 have been sometimes confused, but are really entirely distinct. 

 The Plasmodium, prcecox has many points of similarity to the 

 parasites of human malaria, and in many stages is so like that it 

 can only be difterentiated by the pi'esence of the oval nucleus of 



