504 Howard Ayers, 



Wie GliNTHER annahm uiid wie kiirzlicli durch Beobachtung 

 festgestellt ist, urhalten die Eier des Ceratodus eine albuniiuose 

 Decke bei ihrem Diirchgang durch die Eileiler und sic verlassen 

 den Korpei- des Thieres in perlschuurartigen Striingen , ahnlich 

 wie bei nianchen Aniphibien. Der Eileiter ist stark gewuuden und 

 die Eiweissdi'iisen sind in der Wand bei Ceratodus vorzuglich ent- 

 wickelt. Die Structur der Hoden des Ceratodus liat Gunther 

 a. a. 0. p. 550 wie folgt beschrieben. 



„The structure of the testicle was found not to be identical on 

 both sides. In the left testicle three strata can be distinguished on 

 external inspection and by transvers section made about the middle 

 of its leugth, viz: — a light liver-colored substance, forming by for 

 the greater portion of the organ; then a much thinner and nar- 

 rower stratum of whitish color, lying on the liver-colored sub- 

 stance along the line of atttachmeut to the intestine; finally a still 

 more superficial and still narrower layer of a dark yellow fatty 

 blastema which accompanies the vena testicularis. A duct (vas 

 lougitudinale) traverses the whitish substance of the testicle from 

 one end to the other (PI. XL, Fig. 3 and 4 a); it is widest in 

 the middle (scarcely one sixteenth of an inch) , and tapers towards 

 its extremeties without penetrating to the surface of the testicle; 

 its walls are perforated by innumerable pore-like openings, leading 

 immediately into the canaliculi seminifuri (d). Colored fluid in- 

 jected into the duct was equally distributed throughout the sub- 

 stance of the testicle, through the whitish portion as well as the 

 liver-colored; but in the former the canaliculi seminiferi were more 

 distinct, visible to the naked eye, densely packed; parallel to 

 one anothei', arranged in obliquely decussating rows. 



The course and arrangement of the canaliculi in the liver- 

 colored substance of this (left) side could not be clearly made out, 

 as it had too much suffered by decomposition; but on the right 

 side they could easily be filled with fluid, at least those nearest 

 the surface, they run parallel to one another, across the, testicle, 

 at right angles to its longitudinal axis, they have a slightly wavy 

 course, but do not subdivide, and appear to be equally wide 

 throughout their length. 



im Wasser, in fl^achen Gruben, die zur Aufnahme der Eier in schlam- 

 migen Ufern ausgehohlt sind. Man hat die Jungen kiinstlich aus- 

 gebrlitet und gefunden, dass sie den Kaulquappen von Eana in ihrem 

 ausseren Character gleichen. Mannchen und Weibchen sind wahrend 

 der Laichzeit stets bei einander. 



