406 



Part III. — Eighteenth Annual Report 



might bo thought that if Jaxea were present in the Clyde, specimens 

 occasionally ought to be taken in the trawl or dredge, yet none have ev< r 

 been observed. This, however, does not militate against the supposition 

 that this crustacean occurs within the Clyde estuary, for its habitat may 

 be about rocky ground, where neither trawl nor dredge could be used, but 

 which would offer no obstruction to gurnards in their search for food. 

 Moreover, it was shown in my paper in Part III. of the Seventeenth 

 Annual Report (1899) that at Naples, though the larval forms of 

 Calliaxis {Jaxea) are met with amongst the surface fauna, the adult has 

 only been found once in 25 years. But whatever be the opinion concern- 

 ing the habitat of this apparently rare species — that is, " rare " as regards 

 its adult form — the fact that fragments of adults were found in the 

 stomachs of gurnards caught in the vicinity of Ailsa Craig is in itself of 

 much interest to students of the British Crustacea. The fragments referred 

 to above are now in tte Laboratory at Bay of Nigg. 



After the preceding notes had been sent to the printer, Mr. Pearcey 

 kindly forwarded the posterior portion of another specimen of Jaxea, 

 which he had obtained in the stomach of a witch sole (Pleuronectes 

 cynoglossus, Z.) captured at Station VIII., Firth of Clyde, on the 20th of 

 November last (1899). Station VIII. is about five miles west by south 

 of Ailsa Craig. (This specimen is in our collection at Bay of Nigg with 

 the others previously referred to.) 



EXPLANATION OF THE PLATES. 

 PLATE XIII. 



Corycmis anglicus, Lubbock. 



Fig. 1. Female, dorsal view . . . . . x 70, 



Fig. 2. Antennule ....... x 190. 



Fig. 3. Antenna . . . . . . . x 190. 



Fig. 4. Mandible ....... x 380. 



Fig. 5. Maxilla ........ x 380. 



Fig. 6. Anterior foot-jaw ...... x 380. 



Fig. 7. Posterior foot-jaw ...... x 190. 



Fig. 8. Foot of first pair of swimming-feet . . . x 190. 



Fig. 9. Foot of third pair „ „ x 190. 



Fig. 10. Foot of fourth pair ,, . . . x 190. 



Fig. 11. Foot of fifth pair ...... x 760. 



Fig. 12. Antenna, male ....... x 190. 



Fig. 13. Posterior foot-jaw, male . . . . x 190. 



Fig. 14. Abdomen and caudal stylets, male . . . x 160. 



Monstrilla (?) dance, Claparede. 



Fig. 15. Female, dorsal view . . . . . x 20. 



Fig. 16. Antennule, male . . . . . x 40. 



Fig. 17. Foot of first pair of swimming-feet, female . . x 80. 



Fig. 18. Fifth thoracic feet, female . . . . x 40. 



Fig. 19. Last thoracic segment, abdomen and caudal stylets, male . x 80. 



Fig. 20. Fifth thoracic feet, male . . . . x 40. 



Enterocola (?) fulgens, Van Beneden. 



Fig. 21. Female, dorsal view . . . . . x 40. 



Fig. 22. Antennule . . . . . . . x 160. 



Fig. 23. Antenna . . . . . . . x 160. 



Fig. 24. Maxilla . . . . . . . x 190. 



Fig. 25. Posterior foot-jaw . . . . . x 253. 



Fig. 26. Foot of first pair of swimming-feet . . . x 126. 



Fig. 27. Foot of second pair „ . . . x 126. 



