G. C. Crick — Zieten's Ti/pes of Ammonites. 563 



■de Montfort's genus Amaltheiis, but Parona and Bonarelli ^ include it 

 in the genus Zophoceras instituted by them in 1897. 



(ii) Ammonites discoides, C. H. v. Zieten, Yerstein. Wiirttembergs, 

 Heft iii (1831), p. 21, pi. xvi, figs, la, b, c. This specimen [register 

 number 62,568] is accompanied by a label in Dr. Bruckmann's 

 handwriting: to the followino; elfect : " From Zieten's collection. 

 Ammonites capelliniis jurensis, Quenst. (.4mm. discoides, Ziet., T. 16, 

 F. 1). Selten. Jurensismergel. Heiningen in Wiirttemberg"; and on 

 the label there has been written in pencil the letters " [Dr. 0.]," 

 signifying "Dr. Oppel." Its size, general form, and colour agree so 

 well with Zieten's figure (except that the latter is reversed), that there 

 can be no doubt whatever as to its identity. At about the com- 

 mencement of the last third of the outer whorl a small piece is 

 broken away at the periphery, and although this imperfection is not 

 figured, yet the shape of the anterior portion of the specimen is so 

 accurately represented in Zieten's figure that there cannot possibly 

 be any doubt as to the identification of the specimen. 



Zieten's description is as follows: — "Eiicken sehr scharf, die 

 inneren VVindungen stark bedeckt, Eippen sichelformig, welche auf 

 der scharfen Exickenkante in spitzigen Winkeln zusammenlaufen. 

 In der Hauptform dem Ammonites discus (Sow.), ahnlich. Aus dem 

 Lias-Sandstein von Eeichenbach im Thai." 



[" Back (periphery) very sharp, the inner whorls strongly ornamented, ribs falci- 

 form and meeting on" the sharp periphery in acute angles. In general form similar 

 to Ammonites discus, Sowerby. From the Lias sandstone of Reichenbach in the 

 Valley."] 



In this case also there seems to be a discrepancy between the label 

 and Zieten's statement as to the locality of the fossil ; Heiningen, 

 the locality given on the label, being about three miles south of 

 Goppingen, whilst "Eeichenbach im Thai," the locality given by 

 Zieten, is north of Donzdorf and almost due east of Goppingen. 

 Quenstedt, in his work on " Die Ammoniten des schwabischen 

 Jura" (Bd. i. Heft 8-9, 1885, pp. 416-7, tab. liii, figs. 1 and 3), 

 records the species from the Jurensis-heds at both places. 



It may be remarked that this species was placed by Hyatt Mn his 



1 Mem. Acad. Sci., etc., Savoie, ser. iv, vol. vi (1897), p. 122. 



2 A. Hyatt : Bull. Mus. Comp. Zool., vol. i, No. 5, p. 102. The whole volume, 

 consisting of Nos. 1-13, is dated 1863-9 ; No. 4 was published in June, 1865, and 

 No. 6 is dated December 26, 1867, but the copies of No. 5 that I have seen are not 

 dated. This number, however, was published towards the end of December, 1867. 

 For this date I am indebted to Mr. S. S. Buckman, who tells me that he has a copy 

 of Prof. Hyatt's paper bearing a date-slip, of which the following is an exact copy :— 



Boston Societi/ of Nattiral Eistory. 

 March 23, 1868. 

 [Extract from Records of Jan. 3, 1868.] 

 " Mr. A. Hyatt laid upon the table No. 5 of the Bulletin of the Museum of 

 Comparative Zoology, pubKshed about a week since, but accidentally hearing no 

 date of publication," etc. „ „ 



S. H. SCUDDER, 



Sec. Boston See. Nat. Hist. 



Please attach this to the copy oi the Bulletin sent to you. 



A. Hyatt. 



