Dwellers of the sea and shore dwellersofseasho00crow Year: 1935 38 Dwellers of the Sea and Shore visible without the aid of a good lens. This boring apparatus is virtually a rasp armed with hundreds of abrading points. It is located well up in the proboscis and is brought into play through the peculiar ability of this organ to turn itself partly inside out, much in the fashion that the finger of a glove can be turned within itself. RADULA, OR RASPING ORGAN OF THE MOON SNAIL. (GREATLY ENLARGED.) Attached to the under side of the proboscis, near the end, is a soft circular pad. The presence
Dwellers of the sea and shore dwellersofseasho00crow Year: 1935 38 Dwellers of the Sea and Shore visible without the aid of a good lens. This boring apparatus is virtually a rasp armed with hundreds of abrading points. It is located well up in the proboscis and is brought into play through the peculiar ability of this organ to turn itself partly inside out, much in the fashion that the finger of a glove can be turned within itself. RADULA, OR RASPING ORGAN OF THE MOON SNAIL. (GREATLY ENLARGED.) Attached to the under side of the proboscis, near the end, is a soft circular pad. The presence of this at- tachment at once gives the clue as to how the moon snail penetrates the shell of its victim; for it seems to serve as a sucking disk, and by means of its holding power is the necessary purchase obtained to apply the pressure of the drill. But the most significant feature is the pair of cutting jaws just within tlie tip of the eversible proboscis. Each jaw is a thin platelike blade of irregular shape and is fixed so that it presents a razor edge to its com-
Size: 1040px × 1924px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
