. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. MOLLUSCS, VERMES AND HYDROZOA leaves by clean cuts across the blades, others by devouring the edges. If the aquarium is not covered they leave the water and crawling on the glass and over the edges dry out and die. One was found twenty feet from the nearest aquarium. Planorbis. This numerously represented genus has the spiral shell flattened so that the view from above, below and on each side is different. The species vary in
. Goldfish breeds and other aquarium fishes, their care and propagation; a guide to freshwater and marine aquaria, their fauna, flora and management. Aquariums; Goldfish. MOLLUSCS, VERMES AND HYDROZOA leaves by clean cuts across the blades, others by devouring the edges. If the aquarium is not covered they leave the water and crawling on the glass and over the edges dry out and die. One was found twenty feet from the nearest aquarium. Planorbis. This numerously represented genus has the spiral shell flattened so that the view from above, below and on each side is different. The species vary in size, the largest being one and a half inch in diameter and the smallest less than ^ inch. It is the best native easily procured snail for the aquarium, preferring algas to any other food, and if not over- stocked is harmless to aquatic plants and is a good scavenger. P. iicarinafus. Fig. 168, has a brownish-grey shell never over ^ inch in diameter, showing pale grey lines in the suture, with more than three complete whorls, angulated on each side with a slightly keeled periphery. The spire is on the left side and is depressed as deeply as on the other side. The body I | is a dusky or blackish-brown and the tentacles a yellowish-brown, generally of varying lengths. It inhabits quiet waters from New England to Georgia and west- ward to Tennessee, and will hi- bernate in cold water. The eggs are deposited from March to fig. 168. PWri«w<:«r,w«., four views. Enlarged. July in small irregular yellow masses and hatch in 15 to 25 days, depend- ent upon the tefnperature. P. campanulatus. Fig 169, has a yellowish ^ inch in diameter compact shell, consisting of four slowly enlarging flattened whorls, distinctly marked. 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 Wolf, Herman Theodore, 1855-. Philadelphia, I
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectaquariu, bookyear1908
