TITLES. 
Verm. 13 
201. Leydig, Franz. Die “neu entdeckten” Sinnesorgane cler Russelegel. 
Zool. Anz. xxii, pp. 97-100. 
202. Lillie, F. R. Adaptation in Cleavage. Biol. Lectures, Wood’s Holl, 
1898, Boston, 1899, pp. 43-67, 20 figg. 
203. Lillie, R. S. Larvae of Arenicola cristatcc. Science ix, pp. 183 & 
184. 
204. Linstow, O. v. Zur Kenntniss der Genera Hystrichis und Tropido- 
cerca. Arch. Naturg. lxv, Bd. 1, pp. 155-164, Taf. 13 & 14. 
205. -. Nematoden aus der Berliner zoologischen Sammlung. Mt. 
Mus. Berlin, i, Heft 2, pp. 5-28, Taf. 1-6. 
206. -. Bericht iiber die wissenscliaftlichen Leistungen in der Natur- 
geschichte der Helminthen im Jalire 1893. Arch. Naturg. lx, Bd. 2, 
pp. 207-248, 1894. Issued, July 1899. 
207. Linton, E. An economical consideration of Fish Parasites. Bull. 
U. S. Fish. Comm, xvii, 1898, pp. 193-199. 
208. Liversidge, A. The blue pigment in Coral ( Heliopora ccerulea) and 
other animal organisms. J. R. Soc. N. S. Wales xxxii, 1898, pp. 256- 
268. 
Rhynchodemus. 
209. Lo Bianco, S. Notizie biologiche riguardanti specialmente il periodo 
di maturity sessuale degli animali del golfo di Napoli. Mt. Stat. 
Neapel xiii, pp. 448-573. 
Vermes, pp. 476-493, and 495. 
210. Logan, W. N. A discussion and correlation of certain subdivisions 
of the Colorado Formation. J. Geol. vii, pp. 83-91. 
Serpula plana. 
211. Loisel, G. Les causes et les consequences de la presence des re¬ 
serves nutritives dans les ceufs. Miscellanees biologiques. Trav. 
Stat. Zool. Wimereux t. vii, pp. 402-432. 
212. Looss, A. Die Ankylostomafrage. Centrbl. Bakter. xxv, pp. 662- 
669. 
Cf. Leichtenstern (199). 
213. -. Weitere Beitrage zur Kenntniss der Trematoden-Fauna 
iEgyptens, zugleich A^ersuch einer natiirlichen Gliederung des Genus 
Distomum Retzius. Zool. Jahrb. Syst. xii, pp. 521-784, Taf. 24-32 
and 2 text-figg. 
214. Lucas, F. A. The causes of mortality among fur seals. The Fur 
Seals and Fur-seal Islands of the North Pacific Ocean iii, pp. 75-98. 
Washington, 1899. 
Uncinariosis, cf. Stiles & Hassall (361). 
215. Luhe, M. Beitrage zur Kenntnis der Bothriocephaliden. Centrbl. 
Bakter. xxvi, pp. 702-719. 
216. -. Zur Kenntnis einiger Distomen. Zool. Anz. xxii, pp. 524- 
539. 
217. -. Bemerkungen zu Ariola’s neuestem Cestoden-Systeme. T. c. 
pp. 539-543. 
2 IB. -. Zur Anatomie und Systematik der Bothriocephaliden. Verh, 
Deutsch. zool. Ges, 1899, pp. 30-55, 
