What does the fortune teller mean when he says snails without shells? _ What does the fortune teller mean when he says there are no snails with shells?

What is the name of a snail without a shell? Why does it have no shell?

Slugs are relatives of snails.

slug

Agriolimax agrestis Linnaeus, Gastropoda, Amphibia. Also known as water dragonfly. It is often called slug or slime worm.

Host crops and weeds such as strawberry, cabbage, cauliflower, Chinese cabbage, cabbage, spinach, lettuce, cowhide, eggplant, tomato, watercress, broccoli, purple cabbage, lily and beans.

Harmful characteristics: bringing the leaves of herbivorous grapes into holes or non-staple grape fruits will affect the commodity value. It is a harmful animal with a complicated diet and a large appetite.

The morphological characteristics are as follows: the body length of the worm is 30-60 mm and the body width is 4-6 mm; The inner shell is 4 mm long and 2.3 mm wide. Long spindle-shaped, soft and smooth, with no shell, and the body surface is dark black, dark gray, yellowish white or grayish red. Two pairs of antennae, dark and black, and the next pair is short, about 1mm, which is called anterior antennae and has sensory function; The upper pair is about 4mm long and is called the rear antenna, with eyes at the end. There are horny teeth in the mouth and the mantle at the front end of the back of the tongue, which is 1/3 in length and the edge is rolled up. There is a degenerated shell (that is, a shield plate) inside, and there are obvious concentric lines, that is, growth lines. The center of concentric circles is on the right side of the back end of mantle. The breathing hole is in front of the right side of the body, and there are small colored lines around it. Sakaki is outspoken. Mucus is colorless. About 2mm behind the right antenna is the genital foramen. Oval, tough and elastic, 2-2.5 mm in diameter. The white and transparent egg nucleus can be seen, and the color changes dark when hatching. The newly hatched larvae are 2-2.5 mm long and light brown; The same size as an adult.