Fig. LV. — C. (Siphonostra) spinifera n. sp. — 13. First eiulito of tlie maxilla, ?; 312 X. 14. Second oiidito of the 



maxilla; in a position opposite to that of the first and third endites; ?; 312 X. 15. Third endite of the maxilla, ?: 



312 X. 16. Distal part of the endopodite of the left maxilla, seen from inside, ?; 480 X. 17. Seventh limb, ?; 312 X. 



18. Distal part of the seventh limb, all the cleaning bristles broken; from a larva in the last stage; 480 X. 



