758 



ARTHROPODA 



PHYLÜM VII 



than the primitive caridoid forms may, however, justify some suspicion as 

 to it-s affinities. Fraearcturus Woodward, from the Old Red Sandstone of 

 Herefordshire, has very slender claims to be admitted into 

 this Order, and the same may be said of Amphipeltis Salter 

 (Devonian of Nova Scotia), and Arthropleura Jordan (Goal 

 Measures). 



Undoubted Isopods appear in Secondary rocks. Urda 

 Münster (Fig. 1469), from the Kimmeridgian of Solenhofen, 

 has some very peculiar characters in which it approaches 

 the males of the Recent Gnathia, differing, however, in the 

 large size of the eyes. Cyclo sphaeroma Woodward, from the 

 Great Oolite and Purbeck, resembles in general form some 

 Recent members of the family Sphaeromidae, as do also 

 Archaeoniscus Milne Edwards (Fig. 1470), from the English 

 Purbeck and JEosphaeroma Wood ward (Fig. 1471), from the 

 Eocene and Miocene. Palaega Woodward (Fig. 1472), 

 Cenomanian and Oligocene, has a general resemblance to 

 the Recent Aega and allied genera. Proidotea Racovitza and Sevastos, from 



Fig. 1469. 



Urda rostrata Miüist. 

 Lithogiaphic Stone ; 

 Solenhofen, Bavaria, 

 Vi (after Kunth). 



Fro. 1470. 



A , Archaeoniscus brodei 

 M. Edw. Purbeck ; Vale 

 of Wardour, Wiltshire. 3/ 

 (after Wootlward). ß, Frag- 

 ment of inatrix. i/, (after 

 Quenstedt). 



Fig. 1471. 



A, Eosphaeroma hrongniarti 

 M. Edw. Middle Oligocene ; 

 Butte de Chaumont, near 

 Paris. 3/1 (after Woodward). 

 B Fragment of matrix. i/i 

 (after Quenstedt). 



Fig. 1472. 



Palaega scrobiculata (v. 

 Ammon). Lower Oligo- 

 cene ; Haring, Tyrol. an, 

 Antennae ; 0, Eyes ; jß, 

 Uropod ; I-Vll, Thoracic 

 Segments ; 1-6, Abdominal 

 Segments. 



Se^VaTvifera"' Eoumania, is closely allied to the Recent Mesidotea in th. 



Order 5. AMPHIPODA Latreille.i 



Body usualhj compre.sed latendly. Carapacs absent ; first thoracic somüe, more 



• •, « .italogue of the Amplupoda in the British Museum, 1862. 



4 



