. . which finally attacks the bones." Flies deposit
their ova in the nasal discharges, and from their infection
maggots eventually arise. In Sanskrit peenash signifies disease
of the nose, and is the Indian term for the disease caused by the
deposition of larvae in the nose. It is supposed to be more
common in South America than in India.
CHAPTER XVI.
ANOMALOUS SKIN-DISEASES.
Ichthyosis is a disease of the skin characterized by a morbid
development of the papillae and thickening of the epidermic
lamellae; according as the skin is affected over a larger or
smaller area, or only the epithelial lining of the follicles, it
is known as ichthyosis diffusa, or ichthyosis follicularis. The
hardened masses of epithelium develop in excess, the epidermal
layer loses in integrity, and the surface becomes scaled like
that of a fish. Ichthyosis may be congenital, and over sixty
years ago Steinhausen described a fetal monster in the anatomic
collection in Berlin, the whole surface of whose body was covered
with a thick layer of epidermis, the skin being so thick as to
form a covering like a coat-of-mail. According to Rayer the
celebrated "porcupine-man" who exhibited himself in England in
1710 was an example of a rare form of ichthyosis.
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