342 



well-marked lateral lobe. The medial and posterior margins are somewhat 

 indented or crenate. The endopod of the fifth pair has the lateral margin 

 concave and crenate. Exopods I-III and V exhibit the characteristic forms 

 sho'^Ti in Fig. 1, e-h. 



1, a. Trichoniscus demivirgo, dorsal view of female. 



b. " " lateral view of head. 



c. " " dorsal ^dew of head. 



d. " " telson and left iiropod. 



e. " " pleopod I (Sharon specimen). 

 /. " " pleopod II (Sharon specimen). 



y. " " pleopod III (Mount Desert Island specimen). 



h. " " pleopod V (Mount Desert Island specimen). 



i. Miktonisctjs halophilus, lateral view of head, female. 



j. " " dorsal view of head, female. 



