126 ZOOLOGICAL LITERATURE. 
Steinpachner, F. Ichthyologische Notizen. (VIII.) Ibid. 
, pp. 120-1 39j with seven plates. (IX.) Ibid. pp. 290-318^ 
with eight plates. 
. Van Beneden, P. J. Le commensalisme dans le Begne animal. 
, Bull. Ac. Belg. xxviii. 1869, pp. 621-648. 
\ The author distinguishes from true parasites those which 
\ merely profit by the greater power of locomotion of their host, 
not drawing their means of subsistence from its body, but par- 
taking of the food brought within their reach. These animals 
are called Commensals by the author, and they are either free 
or fixed to the host. The class of fishes oflPers several instances 
, of the former kind, and one (Echeneis) of the latter. 
C. Anatomical and Physiological Publications. 
f' Gegenbaur, C. Ueber das Skeletgewebe der Cyclostomen. 
Jena. Zeitschr. Medic, u. Ntrwiss. 1869, v. pp. 43-53, with 
a plate. [On the histology of the skeleton of Cyclostomes.] 
Greiiant, — . Recherches physiologiques sur la respiration 
1 des Poissons. Ann. Sc. Nat. 1869, xii. pp. 371-382. 
I Gulliver, G. On certain nondescript bones in the skull of 
/ Osseous Fishes. Ann. & Mag. Nat. Hist. 1869, iv. pp. 397, 
I 398. 
I Hyrtl, J. Ueber Ampullen am Ductus cysticus der Fische. 
I Denkschr. Ak. Wiss. 1868, xxviii. pp. 185-190, with three 
; plates. 
; Ueber die Blutgefasse der aussern Kiemeiideckel-Kieme 
j von Polypterus lapradei (Steind.). Sitzgsber. Ak. Wiss. 
Wien, 1869, lx. pp. 109-113, with a plate. 
Kowalewsky, a., Owsjannikow, Ph., und Wagner, N. Die 
Entwickelungsgeschichte der Store. (Preliminary notice.) 
; Bull. Acad. Sc, St. Petersb. xiv. 1869, pp. 317-325. [The 
i history of the development of the Sturgeons.] 
Owsjannikow, Ph. See Kowalewsky, A, 
j . Die Entwickelungsgeschichte der Fluss-Neunaugen 
I {Petromyzon fluviatilis) . Bull. Acad. Sc. St. Petersb. xiv. 
I 1869, pp. 325-329. [The history of the development of 
! the Lampern.] 
Savory, W. S. On the structure of the red Blood-corpuscle of 
I Oviparous Vertebrata. Proc. R. Soc. 1869, pp. 346-350. 
Wagner, N. See Kowalewsky, A. 
