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What (who) is smoke helmet - definition
FAMILY OF MEDIUM-SIZED AND LARGE SEA SNAILS
Helmet shells; Helmet shell; Helmet-shell; Cassinae; Helmet snail; Cassididae
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![''[[Casmaria erinaceus]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Casmaria erinaceus forma vibex 01.jpg?width=200 "''[[Casmaria erinaceus]]''")
![''[[Cassis cornuta]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Cassis cornuta 01.jpg?width=200 "''[[Cassis cornuta]]''")
![''[[Cypraecassis rufa]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Cypraecassis rufa 01.JPG?width=200 "''[[Cypraecassis rufa]]''")
![''[[Galeodea rugosa]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Galeodea rugosa 002.jpg?width=200 "''[[Galeodea rugosa]]''")
![''[[Phalium bandatum]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Phalium bandatum bandatum 001.jpg?width=200 "''[[Phalium bandatum]]''")
![''[[Semicassis granulata]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Semicassis granulata granulata 01.JPG?width=200 "''[[Semicassis granulata]]''")
Hypo helmet
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GAS MASK HEADGEAR USED IN WORLD WAR I
British Smoke Hood; Hypo Helmet
The Hypo helmet, or British Smoke Hood (its official name), was an early British World War I gas mask, designed by Cluny MacPherson.
Coppergate Helmet
![Northumbrian cavalry (right) wearing helmets similar to the Coppergate Helmet. From one of the Pictish [[Aberlemno Sculptured Stones]]](https://commons.wikimedia.org/wiki/Special:FilePath/Pictish Stone at Aberlemno Church Yard - Battle Scene Detail.jpg?width=200 "Northumbrian cavalry (right) wearing helmets similar to the Coppergate Helmet. From one of the Pictish [[Aberlemno Sculptured Stones]]")
8TH-CENTURY ANGLO-SAXON HELMET
Coppergate helmet; York helmet; York Helmet
The Coppergate Helmet (also known as the York Helmet) is an eighth-century Anglo-Saxon helmet found in York, England. It was discovered in May 1982 during excavations for the Jorvik Viking Centre at the bottom of a pit that is thought to have once been a well.
Phrygian helmet
![Ancient depiction on the [[Alexander Sarcophagus]] of a Macedonian infantryman (right) equipped with a typical Phrygian/Thracian helmet with a peak.](https://commons.wikimedia.org/wiki/Special:FilePath/Macedonian Army Pezetairos.jpg?width=200 "Ancient depiction on the [[Alexander Sarcophagus]] of a Macedonian infantryman (right) equipped with a typical Phrygian/Thracian helmet with a peak.")
ANCIENT GREEK HELMET WITH A HIGH, CURVED APEX
Thracian helmet; Phrygian type helmet
The Phrygian helmet, also known as the Thracian helmet, was a type of helmet that originated in ancient Greece and was widely used in Thrace, Dacia, Magna Graecia and the Hellenistic world until well into the Roman Empire..
Wikipedia
Cassidae
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The Cassidae are a taxonomic family of medium-sized, large, and sometimes very large sea snails commonly called helmet snails or bonnet snails. These are marine gastropod mollusks in the superfamily Tonnoidea and the clade Littorinimorpha.
About 60 species comprise the family Cassidae; an example is Cypraecassis rufa.
