312 Hen- J. Wagner on the 



It seems to me tliat only general observations sucli as these 

 are possible in the present state of our knowledge of tlie 

 development of Arachnids. Above all the development of 

 tlie SolifugfB and Pseudoscorpions must be tlie subject of 

 further embryological investigations. These must either 

 confirm or overtlirow the proposed division of the Araehnida 

 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 Araneina." 



Quart. Journ. Micr. Sci. vol. xx., 1880. 



(2) Babrois, J. — " 8ur le developpement des Chelifers." Compt. 



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



(3) . " Recherches sur le developpement des Araign^es.'' Journ. 



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

 1877. 



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



Tubules in the Aithropoda." Ann. & Mag, Nat. Hist. (6) 

 vol. iv., 1889. 

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

 Acaridae to tbe Araehnida." Journ. Linn. Soc. Loud., Zool. 

 vol. xxiv., 1892. 



(6) , " The Stigmata of the Ai-achnida as a Clue to their An- 



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



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



poda ai'ose from Setiparous Sacs." Zool. Jahrbiicher, Abth. 

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



(8) Berteaux, L. — "Les Poumons des Arachnides." *La Cellule,' 



v., 1892, 



(9) Bektkau, 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., 1868. 



(11) Croxeberg, a. — "Ueber den Bau von Eylais extendens, 0. F. 



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

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



(12) . " Ueber die Entwickelungsstadien von Galeodes.''^ Zool. 



Anz., 10. Jahrg., 1887. 



(13) DoHRN, 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 (Phalangiidae)." Arbeit, aus 

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

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



a.ssigned to the Phalangidse, while some are referred to the Pedipalpi, 

 Aranese, and Chernetidso. Finally Scudder (Zittel, loc. cit.) assumes that 

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

 Chernetidse (the resemblance between Kreischeria and the Pseudoscorpions 

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

 paper). 



