. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. SNAILS AND LIMPETS. 181 a greyish-white or yellowish horn-colour, and is sometimes covered with some extraneous substance. There are from six to eight whorls, the body-whorl being much larger and more swollen than the others. The spire is elongated, and tapers gracefully to a fine point. The sutttres are rather deep, and the aperture is almost oval. This snail incloses its eg
. Fresh-water aquaria: their construction, arrangement, and management, with full information as to the best water-plants and live stock to be kept, how and where to obtain them, and how to keep them in health. Aquariums. SNAILS AND LIMPETS. 181 a greyish-white or yellowish horn-colour, and is sometimes covered with some extraneous substance. There are from six to eight whorls, the body-whorl being much larger and more swollen than the others. The spire is elongated, and tapers gracefully to a fine point. The sutttres are rather deep, and the aperture is almost oval. This snail incloses its eggs, some- times numbering as many as 130, in an orbicular capsule. The fry are hatched, according to the temperature of the water, in from fifteen to twenty days. Limnsea awicularia (Fig. 120) has a greater liking for con- fervse than L. stagnalis, and is therefore more suitable for the aquarium. It is found in the sluggish sti-eams, lakes, and ponds of difEerent parts of Britain, but it is not a very. Fig. 120. LimNjEA auricularia. common species. Even where it does abound, it frequently escapes capture, unless properly searched for, from the habit it has of remaining at or near the bottom of the water. When taken it is easily recognised. The body of the animal is a greenish dark grey, spotted with small black spots and larger white ones. The tentacles are flat, triangular, and spotted with yellowish-grey on the margins. The disc has also a yellow margin. The shell is about lin. long, fin. wide, and of a light yellowish horn-colour. There are four or five whorls^ the body-whorl being much larger than aU the rest of the shell. The spire is short and the apex is much pointed. The aperture is very large and ear-shaped: hence the specific name. The outer lip is bent backward or reflected. L. auricularia lays about eighty eggs, and incloses them in a somewhat. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaquariu, bookyear1890
