462 ME. p. W. BASSBTT-SMITH ON [Apr. 18, 



(2) Teebius tenuiftjecatus. 5 . 



Trebiiis temdfurcatus Rath. Proc. U.S. Nat. Hist. Mus. 1887, x. 

 p. 559. 



Host : Trygon sp. Atlantic. 



G. 16. Elyteophoea Gerst. 



Carapace rounded. Frontal plates distinct. Anterior antennae 

 two-jointed. Fourth thoracic segment with two dorsal plates. 

 Genital segment large, lobed posteriorly. Caudal plates large. All 

 four pairs of tboracic limbs biramose, the branches of the first 

 biarticulate, of the second and third triarticulate, the fourth 

 having the outer branch with three joints, the inner with two. 



(1) Elyteophoea beachypteea. 2 6 . 



Elytrophora hrachyptera Gerst. Arch. f. Naturg. 1853, xix. 



p. 60, pi. iii. fig. 12. 

 Heller, Eeise d. Xovara, 1865, p. 189, 

 pi. xvii. fig. 1. 

 „ „ B.-S. Ann. & Mag. N. H. ser. 6, xviii. 



1896, p. 12, pi. iv. fig. 3. 

 Dinematura tliynni Kollar. 



Arneus thynni Kr. Bidrag til Kundskab, 1863, p. 157, pi. viii. 

 fig. 5. 



Caligeria hella ? Dana, Proc. Amer. Acad. Arts & Sc. 1848, p. 57. 



In Coll. Brit. Mus. 



Host : gills of Thynnus spp. European waters. 



G. 17. Alebion Kr. 



Carapace large, oval. Frontal plates well marked. Anterior 

 antennse two-jointed. Fourth thoracic segment with small dorsal 

 plates. Genital segment broad, prolonged backwards in two 

 elongated processes with the ends and outer margins dentate. 

 Abdomen biarticulate. Caudal plates with long setae. The first 

 three pairs of thoracic limbs biramose, with lunate corneous 

 bodies on outer branches ; fourth pair of limbs quite rudimentary, 

 hidden. 



(1) Alebion caechaeijj. ? 6 • 



Alebion carcharioe Kr. Bidrag til Kundskab, 1863, p. 165, 

 pi. xii. fig. 1. 

 B.-S. Ann. & Mag. N. H. ser. 7, vol. ii. 1898, 

 p. 367, pi. xii. fig. 1. 

 Host : Shark ? Atlantic and Indian Oceans. 



(2) Alebion diefioilb. ? . 



Caligeria difficilis V. Ben. Bull. Acad. Eoy. Belg. ixiv. 1892, 

 p. 258, pi. iv. 



Host : — ? Azores. 



