10 
bleiben die Dornfortsätze gerade, während nach Durchschneidung 
der Bänder die apikalen Teile zephal umgebogen werden. Die re- 
sultierende Wirkung der Bänder hemmt somit geradezu diese zephal 
ablenkende Wirkung der Muskeln, die ziehen somit gemeinsam ,,iiber- 
wiegend“ kaudal. 
Erst nach der Tötung und vollständigen Präparation sowie nach 
der mikroskopischen Untersuchung kann Genaueres über diese Ver- 
hältnisse und wohl auch etwas über die Umbildungsvorgänge selber 
ermittelt werden.“ 
Nachdruck verboten. 
The Branchial, Pseudobranchial and Carotid Arteries 
in Chimaera (Hydrolagus) Colliei. 
By Epwarp PHELPS ALLIS, jr., Menton. 
With 2 figures. 
In 1886, in connection with a work “On the Bloodvessels of 
Mustelus antarcticus,” T. J. Parker gives a figure showing the branchial 
arteries in Callorhynchus antarcticus, and, in 1905, in connection with 
a work on “The Blood-Vascular System of the Loricati,” W. F. ALLEN 
gives a figure of the arteries in Chimaera colliei. PARKER, in the 
text of his work, does not fully describe the arteries in Callorhynchus, 
but he makes frequent reference to them; while ALLEN, in the text 
of his work, makes but slight reference to the arteries in Chimaera, 
the figure having been, according to the description of it, simply 
‘Inserted to show the wide variation in the carotid arteries.” 
No other descriptions of these arteries in the Holocephali have 
been made, so far as I can find, but W. F. Arzen, in 1903/4, when 
he was a member of my laboratory force, made dissections of an 
injected specimen of Chimaera (Hydrolagus) colliei and sent me 
drawings showing the branchial and carotid arteries as he had found 
and identified them. A study of these drawings, and comparison with 
Arven’s published figure, having convinced me that the arteries, as 
shown by him, were either incomplete or most exceptional, I have had 
dissections made, by my assistant, Mr. Joun Henry, of uninjected 
specimens of the fish that I had in my laboratory here, and the 
following descriptions are based entirely on these dissections, The 
method employed was, as in my preceding works, to inject with 
