new and rare Crustacea from Scotland. 149 



to the question of priority, we find that the ' Tenth 

 Annual Report of the Fishery Board for Scotland,' in wliich 

 Stephos is described, was published on September 22nd, 1892, 

 and that Dr. Giesbrecht's work on the Pelagic Copepoda of 

 the Gulf of Naples, in which Mohianus is described, and 

 which bears the date 1892, was published on January 26th, 

 1893. 



EXPLANATION OF THE PLATES. 



Plate VIII. 



Amymone nigrans, sp. n. 



Fig. 1. Male, seen fi"om the side, X 80. 2. Anterior antenna, female, 

 X 190. 3. Mandible and palp, X 380. 4. Foot of third pair, 

 X 170. 5. Foot of fourth pair, x 170. 6. Foot of fifth pair, 

 female, X 253. 7. Foot of fifth pair, male, X 190. 



Stenhelia dispar, sp. n. 



Fig. 8. Female, seen from the side, X 70. 9. Anterior antenna, female, 

 X 380. 10. Foot of first pair, x 190. 11. Foot of fourth pair, 

 X 127. 12. Foot of fifth pair, female, X 253. 



Chtodes irrasa, sp. n. 



Fig. 13. Female, seen from above, X 70. 14. Anterior antenna, female, 

 X 253. 15. Foot of first pair, x 506. 16. Foot of fourth 

 pair, X 506. 17. Foot of fifth pair, female, x 380. 



Ameira exilis, sp. n. 



Fig. 18. Female, seen from the side, x 36. 19. Foot of fifth pair, 

 female, x 127. 20. Abdomen and caudal stylets, x 40. 



Plate IX. 



Ameira exilis, sp. n. 



Fig. 1. Anterior antenna, female, x 100. 2. Foot of first pair, X 127. 

 3. Foot of third pair, male, x 84. 



Thalestris forjiculoides, sp. n. 



Fig. 4. Female, seen from the side, X 54. 5. Anterior antenna, female, 

 X 190. 6. Foot of first pair, x 190. 7. Foot of third pair, 

 male, X 127. 8. Foot of fifth pair, female, X 127. 9. Abdo- 

 men and caudal stylets, X 53. 



Dermatomyzon gibherum, sp. n. 



Fig. 10. Female, seen from above, x 80. 11. Anterior antenna, x 253. 

 12. Mandible, X 304. 13. Maxilla, X 304. 14. Foot of fifth 

 pair, X 253. 



Acontiophorns elongatus, sp. n. 



Fig. 15. Female, seen from above, X 48. 16. Anterior antenna, X 190. 

 17. Mandible, X 152. 18. Siphon, x 152. 19. Foot of fourth 

 pair, x 127. 20. Foot of fifth pair, x 253. 



