. The Cambridge natural history. Zoology. 554 ELEOSTEI. Fam. 9. Notopteridae.—The Fishes which form this family may be regarded as an eccentric modification of a type very similar to the preceding, with which they agree in most osteo- logical features as well as in the dentition, in the connexion between the air-bladder and the ear, and in the absence of oviducts. They differ in the absence of the lid-like supratemporal, the hole which it covers in Hyodon being here bordered by the post-frontal and the squamosal (fused with the opisthotic), sometimes also by the epiotic, in the aljsence of the
. The Cambridge natural history. Zoology. 554 ELEOSTEI. Fam. 9. Notopteridae.—The Fishes which form this family may be regarded as an eccentric modification of a type very similar to the preceding, with which they agree in most osteo- logical features as well as in the dentition, in the connexion between the air-bladder and the ear, and in the absence of oviducts. They differ in the absence of the lid-like supratemporal, the hole which it covers in Hyodon being here bordered by the post-frontal and the squamosal (fused with the opisthotic), sometimes also by the epiotic, in the aljsence of the suboper- culum, in the absence or incom- plete ossification of the upper branch of the post - temporal (the lower articulating with the opisthotic), and in the presence of accessory bones (named ad- pleurals) attached to or fused with the distal extremity of the anterior ribs, which they prolong to the mid-ventral line, where they are embraced by dermal ossifications forming a doubly serrated crest. The bones of the head are cavernous, the mouth is large; the anterior nostril is produced into a tentacle. The body is very strongly compressed, with very short precaudal region, attenuate behind; the ventral fins are much reduced or absent; the dorsal is short or Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
