A EE VI SIGN OF THE ERANCHIOSTOMIDiE. 321 



Incert-s; sedis. 



1. Branchiostoraa elongatum, Sundevall. 

 3. Branchiostoma pelagicum, Giinther. 



Note. — Whilst the three species of Heteropleuron seem to 

 be distinctly characterised, it is very questionable whether 

 more than two species of the sub-genus Amphioxus should be 

 recognised, namely, A. lanceolatus (including A. caribseus 

 and A. Belcheri) and A. californiensis. — E. Ray 

 Lankester. 



BlBLIOGKAPHT. 



1. Andrews, E. A. — 'Johns Hopkins Univ, Studies,' vol. v, 1893, p. 213 : 



"An Undescribed Acraniate, Asymnietron Lucayanum." 



2. BovERi, Th. — " tJber die Bildungsstatte der Geschlechtsdrusen und die 



Entstehung der Genital kanneru beim Amphioxus," ' Anat. Anz.,' vii, 

 1892, pp. 170—181. 



3. EiGENMANN, C. H.— ' Ann. Nat.,' 1892, p. 70 : " Amphioxus in San 



Diego Bay (? B. californiense)." 



4. Gill, J.—' U.S. Nat. Mus.,' v, 1882, p. 515 : " Notes on Leptocardians." 



5. GuNTHER, A.— 'Report, H.M.S. "Alert,"' 1884. 



6. Langerhans, p. — 'Archiv fiir Micr. Anat.,' xii, 1876, p. 290 (lanceo- 



latum). 



7. Lankester, E. R. — ' Quarterly Journal Micros. Sci.,' xxix, 1889, p. 365 



(lanceolatum). 



8. MoRREN, C— ' Bull. Acad. Roy. Beige,' 1875, xxxix, 2, p. 312 (struc- 



ture of notochord, caribseum). 



9. MtJLLER, J. — ' Konigl. Akad. der wissenschaften,' Berlin, 1842, p. 79. 



10. Peters, W.— ' Mouatsbericht Akad.,' Berlin, 1876, p. 322 (cultellum). 



11. De Quatrefages, a. — 'Ann. Sci. Nat.' (3), iv, 1845, p. 197 (lanceo- 



latum). 



12. RoLPH, W.— 'Morph. Jahrb.,' ii, 1876, p. 87 (lanceolatum). 



13. Sundevall.— ' Ofversigt k. vet. Akad. Zorhand.,' 1852, p. 147; 1853, 



p. 11. 



