144 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.10 



6. Maxillae III with a single tooth on either side 



L. bifilaris, p. 153 



6. Maxillae III with 2 teeth on either side. L. chilensis Kinberg 



7. Maxillae II without true teeth ; mandible very broad . . . 

 L. Candida Treadwell 



7. Maxillae II with teeth; mandible not broad 8 



8. Hooded hooks first present from about segments 35 to 46; 

 large, robust L. erecta, p. 149 



8. Hooded hooks first present from about segment 16; minute, 

 slender, resembles a drilonereid .... L. bassi, p. 150 



8. Hooded hooks first present from first parapodia. 



(This includes the following species which I am unable to dis- 

 tinguish clearly from one another: tetraura, sarsi, cingulata 

 Ehlers [1901], oceanica, branchiata, and questionably macu- 

 lata.) 



9. Hooded hooks present from first parapodia 10 



9. Hooded hooks first present after the tenth parapodium ... 12 



10. Mandibles long, slender; maxillaiy formula 6-5, 1-1, 1-1 . 

 L. bifrons (Kinberg) 



10. Mandibles shorter; maxillary formula otherwise . . . . 11 



11. Long, very slender, resembles a drilonereid 



L. parvapedata Treadwell 



11. Not unusually slender; form robust. 



(This includes brevicirra, impatiens, and zonata, p. 146.) 



12. Hooks first present from about parapodia 17; maxillae II with 

 6 and 5 teeth L. tenuis Verrill 



12. Hooks first present from about parapodia 22 to 25 ; maxillae 



II with 4 teeth on either side; acicula black 



L. fragilis (O. F. Miiller) 



12. Hooks first present from about parapodia 14; maxillae II with 

 4 teeth on either side; maxillae III with one tooth on either 

 side L. atlantica Kinberg 



12. Hooks first present from about parapodia 20; maxillae II with 

 4 teeth on either side; maxillae III with 2 teeth on either side 

 L. africana (sensu Monro) 



12. Hooks first present from about parapodia 40 to 47; maxillary 

 formula 4-5, 2-2, 1-1 L. simplex, p. 152 



13. With composite spinigers L. januarii, p. 167 



13. Without composite spinigers 13^ 



13^. Posterior parapodial lobes bilabiate 14 



13^. Posterior parapodial lobes unilabiate, the postsetal lobe pro- 

 longed l5 



