Studies withBrugia pahangi5. Structure of the cuticle

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Abstract
The structure of the cuticle of third and fourth stage larvae and of adultBrugia pahangi(Nematoda: Filarioidea) was studied by light microscopy and by transmission and scanning electron microscopy. The cuticle of these worms was basically typical of the class Nematoda and consisted of cortical, matrix, and basal layers. Finely spaced annulation grooves were present and their function is discussed.Descriptions of the cuticular ultrastructure of filarial nematodes are meagre. Studies on the cuticle of adult worms are limited to those of Kagei (1960, 1963) onSetaria cerviandLitomosoides cariniiand of McLaren and Hockley (personal communication) who examinedL. carinii and Dipetalonema vitea