PLATE XV. 

 Polycheles helleri (p. 138). 



(Pentacheles helleri on Plate.) 



Fig. 1. Anterior portion of the dorsal surface of the cephalon, showing the ophthal- 

 mopoda and both pairs of antenna? (b, c). 



Pentacheles obscura (p. 143). 

 „ 2, ?. Dorsal aspect of the female ; enlarged twice. 

 ,, 2p. Pleon ; lateral view. 

 „ 2o, ? . Posterior pereiopod, chelate in female. 



Stereomastis suhmi (p. 154). 

 (Pentacheles suhmi on Plate.) 



,, 3c. Dorsal view of the animal, male ; enlarged twice. 



„ 3c. Lateral half of the anterior dorsal portion of cephalon, showing ocular notch, 

 ophthalmopod (a), and first antenna (b). 



,, 3c. First antenna. 



,, 3o, $ . Posterior pereiopod of male, showing elongation of the vas deferens. 



,, 4. Lateral view of the same animal. 



Pentacheles Isevis (p. 144). 



„ 4c. Anterior portion of cephalon ; dorsal surface, showing ocular notch with 

 ophthalmopod. 



,, 5 $ . Dorsal view of female ; enlarged twice. 



„ 5p. Pleon; lateral view. 



,, bo, $. Posterior pair of pleopoda in female. 



