48 





MeristeSIa, Hall. Spiriferidw. 



13tli Eeg. Kep. j). 74, (Dec. 'GO or Jan. '(Jl). Afrypa tiimida, Dulm. 

 (Dav. Mon. Sil. Bracli. p. 109, pi. xi, f. 1-13), nientiontd, in preliminary 

 remarks, as belonging to the new group. First sp. cited in list of 

 American examples, M. Icvvis, Hall, 1. c. (cf. CharioneJhi). 



As Atrypa tuonida, Dalm., which has unwisely been in- 

 dnded in Athyris and Merista (and which, for reasons pre- 

 viously giveu, cannot be said to be typical of either), if 

 distinct from these forms as originally typified, remains free 

 to be described generically, it would seem as if this name, 

 as here applied, might stand, unless objection be raised 

 from its previous application to Atrypa naviformis. 

 MerasteMa, Hall, (olim) MSS. 1862. 



15th Regent's Report, pp. 179, 180. Extra copies, pp. 151-2, Decrl862. 

 Types cited, (1) Atrypa qiiadricostata, Hall, Geol. Rep. 4tb Dist. N. York, 

 p. 2-23, f. 2 ; (2) Atrypa vudticosta, Hall, loth Reg. Rep. p. 181, f. 14, 15, and 

 p. 190 ; extra copies, pp. 153, 102 ; (3) A, mesacostaVts, Hall, Rep. 1. c. p. 191 ; 

 extras, p. 163, f. 1 a-c. (= Leiorhynchus, Hall, 18G0-1.) 



It appears, from a note of Professor Hall in the loth 

 Eegent's Rep. p. 148 (extra copies), that during the long 

 delay which took place between the presentation and the 

 printing (partially) of the 13th Eeport and its final pub- 

 lication, some changes were considered desirable by him, 

 and accordingly were made, in the printing-office, some 

 time before its publication. Some proof-sheets having 

 come into the possession of various persons before the above 

 changes were made, and before the report had actually 

 been published, and afterward the discrepancies between 

 said proof sheets and the final issue of the report having 

 excited comment. Professor Hall, in the 15th Report, as 

 above, reprinted the matter as it originally stood, to avoid 

 misconception. This publication may then be considered 

 as void, and standing in the light of an erratum ; Professor 

 Hall's final views being apparently those of the 13th Report 

 as published. It will be observed that the types above 

 quoted are those published as the types of Leiorhynchus, 

 Hall, in the 13th Report, other types being there assigned to 

 Meristella. In this connection, see Professor Hall's note, 

 15th Rep. (extras, p. 148), above cited, and Silliman's Am. 

 Journ. Sci. and Arts, xxxi, p. 292, Mar. 1861, and xxxii, p. 

 430. 



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