79 
solchen, und für die Auffassung von Baue'), Leohe ^) und Carlson 
die hierin ein Tarsalelement sehen , ohne dass ich darin mit Bardbleben 
eine , von niedrigen Wirbelthieren ererbte sechste Zehe erkennen möchte. 
Hierbei ist die hervorgehobene Beziehung der inneren Portion des 
M. tibialis posticus zum „Tibiale" gewiss nicht ohne Bedeutung. Schliess- 
lich sei nochmals hingewiesen auf das so verschiedene Loos, welchen 
das überzählige Stück in der Hand und im Fuss unterliegt, während 
sie vöUig gleich waren in ihrer Anlage. 
d. Sternum. 
(Tafel IX. Fig. 63, 64, 65, 66). 
In W. K. Parker's bekannter Mongraphie über Sternum und Schulter- 
gürtel findet man folgende Beschreibung vom Xiphisternum bei Ma- 
rlis longicaudata : „The xiphisternum bifurcates between the well- 
ossifled first „metosteon" and grows backward as two flat, narrow, 
extremely long „horns"; the left of these is eight inches eight lines 
long, the right nine inches six lines; the rest of the Sternum two 
inches two lines; the whole length, on the right side, being eleven 
inches eight lines. These „horns" are feebly ossified endosteally; the 
left ends in a free point, but the right horn is continuous at its 
supero-posterior end with three abdominal ribs similarly ossified. In 
front of the foremost of the abdominal ribs continuous with the 
„horn", is the first of this curious series (figs. 13 and 17, a. r. 1.); 
it is unossified, and is fourteen lines in length. The second abdominal 
rib (a. r. 2) is five inches six lines long ; the third (a. r. 3) five inches 
two lines , and the fourth (a. r. 4) four inches. The feeble endosteal 
substance is broken up into several patches in these abdominal ribs; 
the space between them and the „xiphisternal horn", from which 
they have never been cleft at their upper ends, is filled with a pe- 
culiar muscle, the counterpart of that which is seen to be quite 
symmetrical in Pholidotus (fig. 12, xxm.) which shows the under 
surfaces of xiphoid and its muscles". 
Zwei Figuren begleiten diese, wenig deutliche Beschreibung; irgend 
1) Baue: Morpholog. Jahrb. X. pag. 460. 
2) Leche: Mammalia in Bronn's Klassen & Ordnungen, pag. 613. 
3) A.. Carlson: Verhandig. d. Biolog. Vereins in Stockholm. 1890. 
4) W. K. Parkee : Shoulder girdle and sternum in Vertebrata. Ray Soe. 1868, pag. 202 
