326 Canon A. M. Norman on British Amphipoda. 



described on the former occasion, the pelvic pair being rela- 

 tively large and advanced far forwards. 



Axdolepis may therefore be placed in the family Clupeidfe, 

 and in tlie primitive section whicli is characterized by the 

 absence of ventral ridge-scales. Careful comparisons seem to 

 show that its nearest ally is the Cretaceous genus Cteno- 

 thrissa *, from which it differs in the non-pectination of the 

 scales and in the relatively smaller size of the pelvic and 

 dorsal fins. 



EXPLANATION OF PLATE IX. Figs. 2, 2 a. 



Fig. 2. Axdolepis tyjms, Ag. ; imperfect fish, left lateral aspect, nat. size. 

 Lower Chalk ; Southeram, near Lewes. [Woodwardian Mu- 

 seum, Cambridge.] 2rt. Upper view of skull of same specimen, 

 nat. size. 



a., anal fin ; a.o., antorbital ; c, base of caudal fin ; /;•., frontals ; m., mes- 

 ethmoid; ind., mandible; wu., maxilla; op., operculum ;/i.o/j., 

 preoperculum ; pa., parietal ; pet., pectoral fin ; pli\, pelvic fin ; 

 s.mx., siipramaxillae ; s.occ, supraoccipital ; sq., squamosal. 



XLVI. — British Amphipoda : Families Pontoporeidse to Am- 

 peliscidai. By Canon NoRMAN, M.A., D.C.L., LL.D., 

 F.R.S., &c.t 



This revision of species of British Amphipoda is intended 

 primarily to give an account of specimens which have passed 

 through my hands and have been identified by myself. 

 Species may have been procured from districts which have 

 been worked by others and recorded ; but if they are also in 

 my collection 1 give my own authority for them. Multipli- 

 cation of exact liabitats of less rare species would too greatly 

 extend the space occupied by distribution, while my own 

 record will have the advantage of confirming that previously 

 made. A carcinologist desiring to be acquainted with the 

 fauna of a particular district will naturally consult the papers 

 which have been published on the restricted area. These 

 observations more especially refer to the Clyde district, in 

 which I first dredged in 1854, and which I have visited many 

 times since, a district which has been so admirably worked as 



* A. S. Woodward, Ann. & Mag. Nat. Hi.«t. [7] vol. iii. (1809) p. 490. 

 t See for preceding paper ' Annals,' Feb. 1900, p. 106. 



