312 Ilerr J. Wagner on the 



It seems to me that only general observations sucli as these 

 are possible in the present state of our knowledge of the 

 development of Arachnids. Above all the development of 

 the Solifugfe and Pseudoscorpions must be the subject of 

 further embryological investigations. These must either 

 confirm or overthrow the proposed division of the Arachnida 

 into two branches, and must elucidate the relation of these 

 forms to the Scorpion. 



Papers quoted. 



(1) Balfour., F. M. — " Notes on the Development of the Araneiua." 



Quart. Jouvn. Mier. Sci. vol. xx., 1880. 



(2) Baerois, J. — " Sur le developpemeut des Chelifei-s." Compt. 



Rend. hebd. Acad. Paris, t. xcix., 1884. 



(3) . '' Recherches sur le developpemeut des Araignees.'' Journ. 



de I'Anat. et de la Phvsiol. norm, et path, de I'homme, &c., 

 3877. 



(4) Beddaed, F. E. — "On the Possible Origin of the Malpighian 



Tubules in the Ai-thropoda." Ann. & Mag. Nat. Hist. (6) 

 vol. iv., 1889. 



(5) Bernard, H. M. — "Some Observations on the Relations of the 



Acaridae to the Arachnida." Journ. Linn. Soc. Lond., Zool. 

 vol. xxiv., 1892. 

 (G) . " The Stigmata of the Arachnida as a Clue to their An- 

 cestry." 'Nature,' vol. xlix., no. 1255, 1893. 



(7) . " An Endeavour to show that the Tracheje of the Arthro- 



poda arose from Setiparous Sacs." Zool. Jahrbiicher, Abth. 

 f. Anat. &c., Bd. v., 1892. 



(8) BERTEAtJx, L. — " Les Poumons des Arachuides." * La Cellule,' 



v., 1892. 



(9) Bertkau, Ph. — " Ueber den Verdauungsapparat der Spinnen." 



Arch, f, mikr. Anat. Bd. xxiv., 1885. 



(10) Claparede, Ed. — "Studien an Acariden." Zeitschr. f. wiss. 



Zool. Bd. xviii., 1808. 



(11) Croneberg, a. — "Ueber den Bau von Eylais extendciis, O. F, 



Miiller, &c." (in Russian). Nachr. d. k. Gesellsch. Freunde 

 Naturw,, Anthrop., u. Ethnogr. t. xxix. 2 Lief., 1878. 



(12) . " Uelaer die Entwickelungsstadien von Galeodes.^^ Zool. 



Anz., 10. Jahrg., 1887. 



(13) DoHEN, A. — " Die Pantopoden des Golfes von Neapel." Fauna 



u. Flora des Golfes von Neapel, 3. Monogr., Leipzig, 1881. 



(14) Faussek, V. — " Studien zu der Entwickelungsgeschichte und 



Anatomie der Afterspinnen (Phalangiidse)." Arbeit, aus 

 dem zootomisch. Laborat. d. k. Univ. zu St. Petersburg, 

 no. 3, 1891. [Cf. resume in Biol. Centralbl. xii. Bd. no. 1 



assigned to the Phalangidae, while some are referred to the Pedipalpi, 

 Aranea3, and Chernetidte. Finally Scudder (Zittel, loc. cit.) assumes that 

 the Anthracomarti {sens, lat.) were related to the Pedipalpi and the 

 Chernetidfe (the resemblance between Kreischeria and the Pseudoscorpions 

 was pointed out by II. B, Geinitz before the appearance of Karsch's 

 paper). 



