. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 348 Not before 1852 did Gruber find (4) the sutura parietalis of Siniia silenus and about 30 years after, Broca (10) found the second case, from a species of monkey, the name of which is not mentioned. After 1880 some new cases of the sutura parietalis of monkeys have been found and in 1900 Frassetto (5) knew 24 examples which in 1903 were augmented with about 50 by Hrdlicka (6). Hrdlicka found his cases especially from Macacus, Cebus and Ateles. It is very remarkable that, in the other groups of the Mammals, a sutura parieta
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 348 Not before 1852 did Gruber find (4) the sutura parietalis of Siniia silenus and about 30 years after, Broca (10) found the second case, from a species of monkey, the name of which is not mentioned. After 1880 some new cases of the sutura parietalis of monkeys have been found and in 1900 Frassetto (5) knew 24 examples which in 1903 were augmented with about 50 by Hrdlicka (6). Hrdlicka found his cases especially from Macacus, Cebus and Ateles. It is very remarkable that, in the other groups of the Mammals, a sutura parietalis has hardly ever been noticed. Even in 1903 not a single case was known so that Schwalbe (7), wrote on page 405: „. . es ist nun höchst beachtungswert, daß bisher in keiner anderen Säugetier- klasse ein geteiltes Scheitelbein gefun- den ist". And on page 410 he con- tinues: „das Parietale bipartitum ist eine im Primatenstamm aufti^etende neue progressive Bildung, welche normaler- weise aber zunächst nur seine Anfänge im früher embryonalen Leben (Ende des dritten Monats) erkennen läßt und gewöhnlich durch frühe Yerschmelzung zur Ausbildung eines einheitlichen Pa- rietale führt, in seltenen Fällen dagegen unter gewissen Bedingungen als doppel- tes Scheitelbein persistiert; unter diesen Bedingungen spielt congenitale Hydro- cephalie eine hervorragende Rolle. Eine atavistische Deutung des Parietale bi- partitumist durch nichts gerechtfertigt". And Hrdlicka (6) 1903 also says on page 232: ". . no case however, has thus far been signalled in any lower mammals than ; And yet in 1901 Frassetto (8) seems to have found a case of the sutura parietalis with the Carnivora, viz., with Ursus americanus. Frassetto mentions this fact only very superficially and says: "Ursus americanus: Divisione multipla in ambo i parietali (primo caso nella letteratura)." Nothing more, not even a picture. This is the first communication of the sutura par
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