PLATE X. 



Figs. 1, 2. Scalpel? inn reginm (Wyv. Thorns.), n. sp. 



Fig. 1. Mouth ami first pair of cirri; magnified 6 diameters. 

 Fig. 2. Edge of the maxilla; magnified 94 diameters. 



Figs. 3-5. ScalpeUum darwinii, n. sp. 



Fig. 3. Complemental male; magnified 40 diameters. 



Fig. 4. Genital apparatus of the male; magnified 94 diameters. /. testis; r.s., recep 



taculum seminis; v.e., vas deferens; x., probably nervous system. 

 Fig. 5. Nervous system of the male strongly (275 diameters) magnified. 



Fig. 6. ScalpeUum tenue, n. sp. 



Fig. 6. Complemental male; magnified 94 diameters. 



Figs. 7-9. ScalpeUum flavum, n. sp. 



Fig. 7. Mandible; magnified 94 diameters. 



Fig. 8. Maxilla; magnified 94 diameters. 



Fig. 9. Caudal appendages; magnified 94 diameters. 



Fig. 10. ScalpeUum tritonis, n. sp. 



Fig. 10. Rudimentary valves of the complemental male; magnified 94 diameters. 



Fig. 11. ScalpeUum balanoides, n. sp. 



Fig. 11. .Mouth; magnified 94 diameters. 



