48 TYPE AMMONITES— VI June 



Emileia from Sherborne and Dundry, which are in the sphaeroceratoid 

 stage ; but the suture-lines of the Argentine forms suggests caution as 

 to definite placing of the South American specimens in Emileia. 



Also possibly not an Emileia is the Sphceroceras brocchi figured by 

 Bayle (Explic. Carte, 1878, Lii, i), which, with heavy primary, almost 

 nodate-ending ribs and rather few secondaries, would seem to belong 

 to another stock. 



In Part LXIII of this work (Plates DCCXa-d) are given figures 

 of Sowerby's original example of Am. brocchii and, in further illustra- 

 tion, of a specimen from my collection. Sowerby's specimen is 

 almost without test, my example has mainly test. The figures of the 

 Sowerby specimen are from a lithograph plate drawn by Mr. F. H. 

 Michael — intended for the second volume of my ' Monograph of Inferior 

 Oolite Ammonites.' The figures were drawn under my supervision and 

 measurements were carefully checked by me with the original : the 

 suture-line, prepared by me, was placed on stone by Mr. Michael from 

 my tracings and delineations. It is not sufficiently intricate in its inner 

 portion, where the specimen is somewhat worn. 



The locality of his specimen is not given by Sowerby in his description 

 of the shell (M.C. ii, 233) ; but it is to be found in the ' Supplementary 

 Index to Vol. II,' by John Farey, p. 250 : it is stated as " Sherborne, 

 [Dorset], presented by the Rev. Mr. Racket." My specimen is from 

 my father's collection. It is marked only " Sh." [Sherborne] : it has 

 the distinctive matrix of the middle part of the Sandford Lane Fossil 

 Bed — see S.B., Bajoc. ; Q.J.G.S., xlix, 1893, pp. 492-494. 



Emileia brocchii is the genotype species of the genus. Both these 

 specimens were the original material studied for naming the genus ; 

 but, as it is now necessary to choose one particular example as a standard 

 of reference, the Sowerbian specimen is taken as that standard — the 

 genolectotype — while my specimen thus remains a genosyntype. 



It is difficult to delineate the suture-lines of specimens of Emileia 

 an account of their great complexity : it is still more difficult to prepare 

 them adequately for photographing. Not only are the lobules of one 

 suture-line so interlocked that there is danger of running off from one 

 lobe to another, but there is also the danger of passing from one suture- 

 line on to its predecessor or successor — so involved are the patterns. 

 The results given in Pis. DCCXb and d are not so satisfactory as could 

 be wished. 



The colomorph, Emileia suhcadiconica (DCCXI), is figured (i) because 

 of its close agreement, if not specific identity with Sowerby's paratype — 

 his small figure — of which it is a syntopite ; (2) for comparison with 

 Emileites malenotatus , PI. DCCII, p. 46. 



The two species of Emileia have been dated as brocchii hemera. 

 This is simply for recording purposes : it does not intend to imply that 

 the brocchii hemera is necessarily distinct from other hemerae, like 

 Witchellia, mollis, hebes and, possibly, Shirbuirnia ; but that the evidence 

 fails to say which date should be given. It is not certain that the 

 Sherborne species, E. brocchii, and the Dundry species, E. subcadiconica, 

 are of the same date ; but from the matrices of E. siibcadicona and 

 Emileites malenotatus, it may be surmised that the former is one bed 

 higher than the latter — the former is § i, 5 in Q.J.G.S., lii, 1896, 676, 

 the latter §1, 6. 



Emileia, or forms which are like Emileia, have a considerable range 

 in time — they, like Witchellia and Witchellia-iorms, range through most 

 of the later Sonninian from about Shirbuirnia to sauzei : to work out 



