This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...similar to the preceding. It spawns in April. The time after this species emerges from its larval stage to its spawning time is so short that it is doubtful if it is ever parasitic on fishes; not recorded from the Chicago area. Class PISCES. Skeleton more or less ossified; skull well developed, separate from the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...similar to the preceding. It spawns in April. The time after this species emerges from its larval stage to its spawning time is so short that it is doubtful if it is ever parasitic on fishes; not recorded from the Chicago area. Class PISCES. Skeleton more or less ossified; skull well developed, separate from the segmented vertebral column; mouth with true jaws; limbs, shoulder, and pelvic bones usually present; usually less than 6 gill openings on each side; gills attached to imperfect skeletal arches; nostrils one or more pairs; heart with arterial bulb; alimentary canal variable in form, and with pancreas and spleen; tail heterocercal, homocercal, or isocercal. Order Selachostomi. The Paddle-fishes. Skeleton chiefly cartilaginous, the vertebrae imperfectly formed, acentrous; anterior vertebrae single; ventral fins abdominal; maxillary obsolete; air bladder cellular, with open duct to oesophagus; snout long and paddle-shaped; tail heterocercal. Family Polyodontidte. The Paddle-fishes. Body elongate, not covered with scales or bony plates; ventral fins abdominal; fins without spines; opercle and subopercle small I mouth large, its border formed by premaxillaries; maxillaries obsolete; snout long, paddle-shaped; 2 pairs of minute barbels on snout, just in front of the mouth; jaws and palatines in young with numerous fine deciduous teeth; intestine with spiral valve; pyloric coeca broad, leaf-like; arterial bulb with several pairs of valves. Genus Polyodoii Lace"pede. Gill-rakers numerous, very long and slender; caudal fulcra of moderate size, 13 to 20 in number; opercle produced into a long triangular flap. 2.S4 Polyodon spathula (Walbaum). Paddle-fish; Spoonbill Cat. Head (from tip of snout to end of opercular flap) 1.5 to 1.7; depth 4 to 4.8 (without ...
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Add this copy of An Annotated List of a Collection of Reptiles From to cart. $49.07, new condition, Sold by Revaluation Books rated 4.0 out of 5 stars, ships from Exeter, DEVON, UNITED KINGDOM, published 2009 by BiblioBazaar.
Add this copy of An Annotated List of a Collection of Reptiles From to cart. $50.41, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2011 by Nabu Press.
