440 
Another species with the Hydromys type of malleus; except for 
the Epimys-like orbicular apophysis, this ossicle is extremely like that 
of Otomys. The incus and stapes are ordinary; there is no bony canal 
between the crura of the stapes. 
Fig. 7. 
a 
} | IN \ N 
ill MRO 
Fig. 7. Malleus and Incus of Thamnomys. 
Fig. 11. Incus of Tachoryctes. 
Bathyergidae. 
Tachoryctes sp. (fig. 11). 
British E. Africa. 
In the specimen studied one malleus was broken and the other lost, 
the skull being old and weathered. Enough remains, however, to show 
that the arrangement is essentially as in Bathyergus maritimus, as de- 
scribed and figured by Doran. In Bathyergus, according to Doran, the 
malleus and incus are completely fused; in Tachoryctes this is not the 
case, and the incus is remarkable for a large, more or less flattened, 
surface for articulation with the malleus. The incus and malleus are 
quite unlike those of the muridae or the squirrels. 
2. Mitteilungen über die Nahrung felsenbewohnender Seeigel der 
nördlichen Adria. 
Von Thilo Krumbach. 
Notizen über die Fauna der Adria bei Rovigno. 
(Herausgegeben von der Zoologischen Station Rovigno in Istrien.) 
(Mit 1 Figur.) 
JE 
Was die neueren Handbücher über die Ernährung der Seeigel mit- 
teilen, ergibt ein widerspruchsvolles Bild. Bronns Klassen und Ord- 
eingeg. 17. Marz 1914. 
