. Journal of morphology . lateral andslightly dorsal to it. It is bounded mesially by the nasal bone andlatero-ventrally by the premaxillary and maxillary. The posterior-portion of the gland, however, becomes partially enclosed betweenthe maxillary bone and the cartilaginous nasal Journal of Morphology—Vol. XX, No. 1. 144 Inez Whipple Wilder. From near the anterior end of the gland, in all of the specimenswhich I have examined, a single duct was found to extend over theposterior margin of the fenestra rostralis (Bruners nomenclature)of the cartilaginous capsule, from whence it pass
. Journal of morphology . lateral andslightly dorsal to it. It is bounded mesially by the nasal bone andlatero-ventrally by the premaxillary and maxillary. The posterior-portion of the gland, however, becomes partially enclosed betweenthe maxillary bone and the cartilaginous nasal Journal of Morphology—Vol. XX, No. 1. 144 Inez Whipple Wilder. From near the anterior end of the gland, in all of the specimenswhich I have examined, a single duct was found to extend over theposterior margin of the fenestra rostralis (Bruners nomenclature)of the cartilaginous capsule, from whence it passes through a notice-able thickening in the wall of the nasal cavity, and opens upon itsinner surface. I had the opportunity to study the same series oftransverse sections of the adult head from which Wilder drew hisconclusions above quoted, as to the existence of two ducts to the gland,and I examined these sections with especial reference to the relationof these ducts to the glandular mass. One duct could be definitely. Fig. 1.—Transverse section through the introductory nasal passage of asmall adult Amphiuma tridactyluni. x ^^ 2/3. This section and those shownin Figs. 2, 3, and 4 are taken from the same series from which the recon-structions given on Plate I., Figs. B, C, and D were made. The locations ofthe sections are indicated upon Fig. D by lines correspondingly : ci, insertion of the constrictor naris muscle into the nasalepithelium ; in, introductory nasal passage; na, nasal capsule; P, portion ofthe premaxillary bone. * traced to the alveoli of the gland; the second duct, however, whentraced back from its orifice, which was slightly posterior and ventralto that of the first, was found to end blindly in close proximity to thegUmdular mass, but without actual connection with it (cf. Fig. 2,and Plate I, Figs. C and D, ad). In connection with the opening of the duct of the gland the con-formation of the nasal cavity must be understood. From the ex
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