78 



A. E. SHIPLEY 



Length of mature female 40 mras. The longest spécimen measu- 

 red 3 mm. more but the otliers were very constant in their length, 

 The head measured 5 mm. The width ol the body which was very 

 constant behind tlie neck, only slightly tapering towards Ihe tail is 



Fig. 23. — Porocephalus tortus, n. sp. — A, immature form ; B, intermediatc 

 form, the rings are disappearing and the twisting is bcginning to sliow 

 itself ; C, mature form, latéral view; D, single hook ; E, mouth and inner 

 hooks. — A, B, C, natural size ; D, E, magnified. 



2,5-3 mms. The length ol" the immature lemale whose rings are 

 just disappearing is 35 mm. and the length of the young form 

 with well marked rings is 10 mm., its breadth about 1 mm. 



Habitat. — In the body of Dipsamorphus irregularis, from New- 

 Britain. Found by D' Willey. 



