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



In the Ranininea we have Eaninella elongata and R. Mulleri, 

 from the Cretaceous of Aachen ; Raninoides Icevis, from the Chalk 

 of Osnabriick; and Ranina cretacea, Dames, from the Lebanon. 

 From the Eocene we have Notopus Beyrichii, Bittner, and Palceono- 

 topus Barroisii, Brocchi, from the Paris Basin ; Ranina Marestiana, 

 Konig, R. speciosa, Miinst., and R. bavarica, Ebert, from the 

 Eocene, Kressenberg, Bavaria, and R. Bouilleana, Milne-Edw., from 

 the Eocene, Biarritz; Ranina Adamsii, H. Woodw., from the Miocene 

 of Malta; R. palmea, TJ. Tertiary, Asti, Piedmont; R. speciosa, 

 Tertiary, Biinde; R. oblonga, from Ebenda ; whilst Ranina scabra 

 (vel dentata), from Amboina, Raninoides per 'sonatus, Notopoides latus^ 

 Notopus dorsipes, Lyreidus tridentatus, L. Bairdii, and Zanclifer 

 caribensis, live at the present day on various subtropical coasts. 



This concludes all that I have to say regarding the Anomalous 

 Brachyura. 



In the Oxystomata, or 'sharp-mouthed' crabs, which derive 

 their tribal name from the more or less triangular shape of the 

 buccal region, the carapace is convex, with the antero-lateral 

 margins arcuate, orbiculate, subglobose or more or less oblong — 

 in fact variable in form. These are represented among living 

 forms by the Dorippidse, the Calappida?, the Matutidse, and the 

 Leucosidae. 



The Dorippid^ are certainly anomalous forms although placed in 

 this division, and would seem more suitably located with the pre- 

 ceding group. The carapace is very broad behind, with projecting 

 abdominal somites as in Dromia — the last two (4th and 5th) pairs 

 of legs being short and feeble with strongly hooked extremities, 

 and carried rather on the dorsal surface — the chelipeds are small, 

 while the 2nd and 3rd pairs of ambulatory legs are long and adapted 

 for running. The weak and small 4th and 5th legs are probably used 

 to carry foreign objects on the back for the purpose of concealment, 

 as noticed by Surgeon-Major Archer at Singapore. 



In the Calappida the carapace is narrow but deep in front, and 

 expanded behind into thin, broad, shield-like expansions which cover 

 and conceal the bases of the walking-legs. The chelate fore-limb3 

 are very flat and strongly crested, like a cock's-comb, and when 

 pressed close to the carapace they meet in front and form an 

 efficient shield to the body. 



In the Matutid^e, represented by Matuta victor, the 3rd, 4th, and 

 5th pairs of limbs are suitable either as paddles or for burrowing 

 in the wet sand, in which they are very expert. 



