410 IMr. Lubbock on new species of Entomostraca. 



abdomen is four-jointed, and the basal segment bears on each 

 side a large plumose hair, which passes backward and outward. 

 Upon the fourth caudal seta (counting from the outside) is an- 

 other, rather smaller than the other five. It lies so close to the 

 fourth seta, that it might easily be overlooked. For the sake of 

 clearness, however, I have in ray figui'e separated them. 



Length of cephalothorax '037, of abdomen '012; total '049; 

 of antenna '027. 



Caught at Weymouth, October 1857. 



PI. X. figs. 7 & 8. 



EXPLANATION OF THE PLATES. 



Plate X. 



Fiy. \. CaJanus Etichafa, iu outline, seen from above ; X 65. 



Fig. 2. Ditto. End of left anterior antenna; X 65. 



Fif/. 3. Ditto. Antenna of the second pair ; X 250. 



Fig. A. Ditto. Leg of the first pair ; x65. 



Fig. 5. Ditto. Fifth pair of legs of the male ; X 125. 



Fig. 6. Ditto. I'ifth pair of legs of the female ; X 125. 



Fig. 7. Monstrilla anglica ; X 30. 



Fig.S. Ditto. Antenna; x6o. 



Fig. 9. Calanus anglicus ; end of antenna ; X 125. 



Fig. 10. Ditto. End of cephalothorax and abdomen, seen from the side; 



X65. 

 Fig. 11. J)m/j/o«i!/s /on^riCHj/t/fl^MS; end of anterior antenna of male ; xl-lO. 

 Fig. 12. Ditto. Fifth pair of legs of male ; X 125. 

 Fig. \3. Pontella IVollastoni ; fifth pair of legs of female ; X30. 



Plate XL 



Fig.^. Diaptomus Bateanus; x&o. 



Fig. 2. Ditto. End of cephalothorax, and beginning of abdomen, seen 



from the side ; X 65. 

 Fig. 3. Ditto. Fifth pair of legs of male ; X 50. 



Fig. 4. Pontella brevicornis ; end of left anterior antenna of male ; X 100. 

 Fig. 5. Ditto. End of left anterior antenna of female; X 65. 

 Fig. 6. Ditto. Fifth pair of legs of male ; X 100? 

 Fig. 7. Ditto. End of maxilhped ; x250. 

 Fig. 8. Ditto. Fifth paii- of legs of female ; X 100. 

 Fig. 9. Pontella JVollastoni ; front seen from above. 

 Fig. \0. Ditto. Anterior antenna of male ; x65. 

 Fig. 11. Ditto. Fifth pair of legs of male ; X 65. 

 Fig. 12. Diaptomus longicaudatus ; end of anterior antenna of female; 



x65. 

 Fig. 13. Ditto. Leg of fifth pair of female ; X 130. 

 Fig. 14. Corycaus anglicus \ abdomen seen from above; x65. 

 Fig. 15. Ditto. Abdomen and end of cephalothorax, seen from the side; 



x65. 

 F/^. 16. Ditto. Antenna of second pair ; XSO. 

 Fig. 17. Ditto. Eyes; x250. 

 Fig. 18. Pontella Wollastoni; end of anterior antenna of female ; xGo. 



