Identifier: journalofmorphol23wist (find matches)
Title: Journal of morphology
Year: 1912 (1910s)
Authors: Wistar Institute of Anatomy and Biology
Subjects: Morphology Physiology
Publisher: Boston : Ginn & Co.
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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JOURNAL OF MORPHOLOGY, VOL. 23, NO. 1 41 PLATE 2 EXPLANATION OF FIGURES 4 Outline of the cranial elements of Diplocaulus magnicornis Cope. E, epiotic;F, frontal; J, jngal; Mx, maxilla; N, nasal; P, parietal; Pf, postfrontal; Po, post-orbital; Pr, prefrontal; Px, premaxilla; Qj, quadratojugal; So, supraoccdpital;Sq, squamosal; St, supratemporal. 5 Mandible from the side to show arrangement of the operculo-mandibularcanal. 6 Outline of the openings and elements of the palate of the skull. .1./, internalnares; Co, condyle; Ep, epiotic; Es, auditory fossa or ear slit; Exo, exoccipital;Mx, maxilla; Pa, parasphenoid; Paf, palatine foramen; Pal, palatine; Pi, ptery-goid; Px, premaxilla; Q, quadrate; Qj, quadratojugal; T, ectopterygoid or trans-ver.se bone. 7 Side view of the skull. J, jugal; Mx, maxilla; Pr, prefrontal; Px, premaxilla;Qi, quadratojugal; .S7. squamosal. 42 DIPLOCAULUS MAGNICORNCS ROT L. MOODIE PLATE 2
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43 MODIFICATIONS IN THE TESTES OF HYBRIDS FROMTHE GUINEA AND THE COMMON FOWL^ xMICHAEL F. GUYER From the Zoological Department, University of Wisconsin TWENTY-THREE FIGURES IN TWO PLATES The following study is based on material obtained from fourguinea-chicken hybrids, the offspring of a yearling black lang-shan cock and a common guinea hen three years old. There wereoriginally five of the hybrids, all male, but during my absencefrom Cincinnati one died and was not preserved. An account ofthe general habits and appearance of these fowls together withan analysis of their peculiar color pattern has already been pub-lished.2 Three of the hybrids were killed at the age of three years,one at the age of six, and the last one died at the age of seven.When five years old the two older ones each developed a pair ofsickle feathers in the tail similar to those so characteristic ofthe ordinary domestic cock, although previous to this time allalike possessed the simpler type of tail feathers seen

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