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PALAEONTOLOGY OF NEW YORK. 
shells perhaps rhynchonelloid in character, but it has not been, nor will it ever 
be possible to determine the author’s conception of the term from his very brief 
diagnosis; “ Beak acute, perforation below it.” No species was cited and the 
name was never used in such a manner as to lead to any notion of its intended 
significance. 
Recognizing the obstacles to the adoption of the term. Professor King re¬ 
defined it in volume xviii (p. 28) of the Annals and Magazine of Natural History 
(1846), deriving his diagnosis from the Atrypa cuboides, Sowerby, which he 
specified as the type of the group. It is evident from King’s observations, 
both in the work cited and in his Permian Fossils (pp. 110-112, 1850), that 
he intended the term Hypothykis to replace Fischer de Waldheim’s name 
Rhynchonella as an appellation for those shells, previously classed with the 
Terebratulidje, which had a plicated exterior and an acute beak. Now that 
the state of our knowledge requires a narrower and more precise delimitation 
of these fossils, we are brought back to the original species, A. cuboides, as ex¬ 
pressing the restricted value of the genus Hypothyris, King, and that term will 
be adopted for this group of Rhynchonellas in preference to introducing a new 
one. 
Subgenus PUGNAX, s.-gen. nov. 
PLATE LX. 
1809. Conchyliolithus anomites, Martin. Petrefacta Derbiensia, pi. xxii, figs. 4, 5 ; pi. xxxii, figs. 7, 8 ; 
pi. xxxiii, figs. 5, 6. 
1822. Tm-ehratula, Sowkrby. Mineral Conchology, pi. cccxv, fig. 3; pi. cccxvi, figs. 5, 6 ; pi. cccxxiv; 
pi. cccxxv, figs. 1-6. 
1834. Terebratula, von Buch. Ueber Terebi-ateln, p. 33. 
1836. Tereln-atula, Phillips. Geology of Yorkshire, vol. ii, p. 222, ifi. xii, figs. 4-12, 16, 17, 25-30. 
1840. Atrypa, Sowerby. Trans. Geol. Soc. London, 2nd ser., vol. v, pi. Ivi, figs. 15-18. 
1841. Terebjatula, Phillips. Palseoz. Foss. Cornwall, Devon and West ''Somerset, p. 86, pi. xxxv, 
fig. 154 ; p. 87, pi. xxxv, fig. 156. 
1843. Tei-ebratula, db Koninck. Animaux fossiles de la Belgique, p. 278, pi. xvii, figs. 3a-/. 
1845. Terebratula, db Vernbdil. Geol. de la Russ, et des Mont, de I’Oural., p. 78, pi. x, fig. 1. 
1855. Rhynchonella, Shumard. Second Ann. Kept. Geol. Surv. Missouri, pi. c, fig. 5. 
1858. Rhynchonella, Hall. Transactions of the Albany Institute, vol. iv, p. 10. 
1858. Rhynchonella, Hall. Geology of Iowa, vol. 1, pt. 2, p. 658, pi. xxiii, fig. 2 a, b. 
1858. Terebi'atula, Marcou. Geology of North America, p. 58. 
1859. Camarophoi-ia, Shumard. Ti-ans. St. Louis Acad. Sci., vol. i, p. 394. 
