XENYLLA. 187 



" Long. 1 millim. In nive ad BelsunclDom. Sunde- 

 wall ; ad Hornsund 1 Aug. copiose visa. Dom. 

 Malmgren. 



" Parva. Pod. armatse Nicolet affinis et magnitudine 

 sequalis, sed tota nigro-plumbea, segmento ultimo 

 abdominis omnino iuermi. Caput subtriangulare, 

 supra fere planum, immaculatum. Oculi parvi, rotun- 

 dati, vix convexi, nigri. Antennae brevissimce sat 

 crass93. Abdomen cylindricum, pube brevissima, 

 grisea adepersum. Pedes breviusculi, crassi, vix 

 pubescentes." 



Hab. Spitzbergen. 



Xenylla, Tullherg. 



" Corpus fusiforme. Primum segmentum thoracis a 

 tergo parum conspicuum. Antennae clavata3. Ocelli 10, 

 5 in utroque latere capitis. Unguiculus inferior deest. 

 Tubus ventralis brevissimus. Furcula parva, totius 

 capitis longitudinem non sequans. Manubrium trian- 

 gulum." 



This genus differs from Acliorutes in the form of the 

 feet, from Podiira in the spring, and from both these 

 genera in the arrangement of the eyes. It contains 

 two species, neither of which is known to me. 



Xenylla maritima. 



Acliorutes maritiinus, O. Fabr. Faun. Grsenl. 

 Xenylla maritima, Tiillberg. Skand. Podur. 



Fabricius describes this species as follows : 



" P. teretiuscula versus anum. Crassior coeruleo- 



nigricaus, abdomine albido. 



" Habitat frequens ad littora super aquam marinam 



in cavernis rupium oestu remanentem, ubi continuo 



salit, non tamen se submergens. Sub fluxu maris littora 



petit, mare pacatum expectans." 



