Vol. 52.] ANNIVERSARY ADDRESS OF THE PRESIDENT. XCV 



and named Urda and Reckur. A third Solenhofen form has been 

 more lately described by von Ammon as Myites Kunthii. 



The well-known and abundant Archceoniscus Brodiei, of West- 

 wood, described in 1845, from the Purbeck of the Yale of Wardour, 

 Wiltshire, closely resembles existing members of the family Oniscidae, 

 to which it probably belongs. Mr. Westwood added another species, 

 Archceoniscus Edwardsi, from the Lower Purbeck of Durdlestone 

 Bay, Dorset, in 1854. 



We owe to Prof. Bell the discovery of the parasitic Isopod, 

 Bopyrus, beneath the carapace of Palceococystes, from the Cambridge 

 Greensand, in 1862. The females of similar forms infest the cara- 

 paces of the common Prawn around our coasts at the present day. 



Palcega Maccoyi, Carter, is from the Upper Greensand of Cam- 

 bridge, and Palcega Carteri, H. Woodw., from the Grey Chalk of 

 Dover. Cymatoga Jazikowi, Eichwald, from the Chalk of the 

 Yolga, completes the series of Cretaceous Isopods. Nearly allied to 

 Palcega Carteri is P. scrobiculata from the Lower Oligocene of 

 Haring, Tyrol. 



The Eocene of the Paris Basin and the Isle of Wight has yielded 

 four species of the genus Eosphceroma 1 ; Sphceroma Catulloi is 

 from the Eocene of Italy ; and one occurs in the Miocene of Bonn. 

 Sismonda, in 1846, recorded and figured a Sphceroma ( = Palcega) 

 Gastaldi from the Miocene of Turin; and Oswald Heer a species 

 of Woodlouse (Armadillo molassicus) from the Miocene freshwater 

 strata of G^ningen. Eive others (Cymodocea sarmatica, Andr. ; 

 Sphceroma exors, Eichw. ; Sph. faveolatum, Costa ; Palcega anconi- 

 tana, Andr. ; Archceosphceroma Fricii) are all Newer Tertiary forms. 



A species of Oniscus* a Trichoniscus, and three species of Por- 

 cellio are all described from the Amber-deposits of Tertiary age on 

 the Baltic coast ; and a fossil Sphceroma ($. Burlcartii) has been 

 described from Mexico by M. Barcena. 



Phyllocarida and Cumacea. — Standing on the border-line be- 

 tween the Malacostraca and Entomostraca are the Phyllocarida, 

 represented at the present day by the genus Nebalia, which affords 

 a connecting-link between the Phyllopoda and the Malacostraca. 

 (see my previous address, Feb. 15th, 1895, pp. lxxxiii & lxxxiv). 



In the earlier of these ancient Silurian ' Pod-shrimps,' such as 



1 Namely, Eosphceroma Smilhii, E. fluviatile, H. W., E. Brongniarti, Edw. r 

 E. obtusum, H. von Meyer. 



2 Namely, Oniscus convexus, Koch, Tertiary amber-deposits, Baltic. Tricho- 

 niscus asper, Menge, loc. cit. Porcellio notatus, Koch, P. grcumlatus, Menge,. 

 P. cyclophorus, Menge, loc. cit. 



