. Guide leaflet. tions The whale-bone whales (Mysticeti, 26) are the only mammalsequipped to feed on the minute animal life of the sea (plankton). Theyhave lost all teeth but have developed great fringed, horny plates withwhich they may strain out these minute animals from the sea water asthey swim along with mouth open. The gullets of these largest of allwhales are very small and suited only to swallowing of small swallow a creature the size of a man would be an impossible feat. Herbivorous or Plant Eating Adaptations In typical herbivorous forms such as the horse and kangaroo thei
. Guide leaflet. tions The whale-bone whales (Mysticeti, 26) are the only mammalsequipped to feed on the minute animal life of the sea (plankton). Theyhave lost all teeth but have developed great fringed, horny plates withwhich they may strain out these minute animals from the sea water asthey swim along with mouth open. The gullets of these largest of allwhales are very small and suited only to swallowing of small swallow a creature the size of a man would be an impossible feat. Herbivorous or Plant Eating Adaptations In typical herbivorous forms such as the horse and kangaroo theincisors are well developed for cutting off the vegetation, the canines aresuppressed, or if present are used only for fighting, and the cheek teethare large and have broad surfaces. BIOIAHIY Of MAMMALS 41 Animals such as the manatee (21), which hve on soft aciualic phintshave a tendency to tootli retiuction. though in some cases, as in thehippopotamus (18), the front teeth are stronji; for digging up Uie i) The whale bone whales have substituted baleenfor teeth. This serves as a seive for the waterpassing through the mouth and strains out theminute animals which are the food of these whales
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
