258 R. I. pococe:. 



2. Benham, W. B. — " Description of tlie Muscular and Endoskelet al Sjsl ems 



of Limulus," ' Trans. Zool. Sue. London,' xi, 18S5. 



3. Bernard, H. M. — "Tiie Endosternite of Scorpio, etc.," 'Ann. Mag. 



Nat. Hist.,' xiii, p. 18, etc., 1894. 



4. Bernahd, H. M. — "The Comparative Morpliology of the Galeodidse," 



' Trans. Linn. Soc. Zool.,' vi, 1896. 



5. Lankester, E. R. — "Limulus in Arachnid," ' Quart. Journ. Micro. Soc.,' 



xxi, 1881. 



6. Lankester, E. R. — "On the Skeletotrophic Tissues, etc., of Limulus, 



Scorpio, and Mygale," ' Quart. Journ. Micro. Soc.,' xxiv, ISSi. 



7. Lankesteu, E. R. — " Comparison of the i\iuscular and Endoskeletal 



Systems of Limulus and Scorpio," 'Trans. Zool. Soc. London,' xi, 

 1885. 



8. Laurie, M. — "On the Morphology of the Pedipalpi," 'Journ. Linn. 



Soc. Zoo!.,' xxiv, I89L 



9. ScHiMKEWiTSCU, W. — " Sur la Structure .... de I'Endosternite, etc.," 



'Zool. Anz.,' 1893. 



10. SciiiMKEWiTSCH, W. — " Ueber Bau und Entwicklung des Entoslernites 



der Arachniden," 'Zool. Jalirb. Anat.,' viii, 1894. 



11. Wasmann, — . — "Anatomic der Spiunen," ' Ahh. Ver. Hamburg,' 184'6. 



EXPLANATION OF PLATES 13 & 14, 



Illustrating Mr. Pocock's paper, " Studies ou the Arachnid 

 Entosternite.'^ 



With the exception of Fig. 1 the figures have been drawn by the author 

 from entosternites dissected and preserved with others, not here figured, in 

 the Natural History Museum, where they arc available for examination. Li 

 the figures representing the dorsal and ventral views of the entosternite the 

 anterior extremity is ui)permost ; in those showing the lateral surface the 

 anterior extremity lies to the right, in the case of the so-called entosternite 

 of the Solifugse, however, the distal or anterior extremity is directed down- 

 wards. 



Letteiung Common to most of the Figures, and indicating 

 Suggested IIo.\iologies. 

 A. P. Anterior process or cornu of right side forming part of the framework 

 of the pharyngeal notch {Ph. N.). Mg., 2/y., 3/y., 4/^., 5/y. Dorsal processes 



