388 Messrs. Foord and Crick on new and 



Angelin's opinion allied to C. scrobieulatus, and I believe that 

 the latter also should be removed from Pycnosaccus ; only_ the 

 evidence of Angelin's pi. xv. fig. 11 could lead one to retain it 

 in that genus, and this figure has a most artificial appearance. 

 Until, therefore, an examination of the type specimens is possible, 

 I shall, for convenience' sake, continue to speak of Oncocrinus. 



Ottmvacrinus—(± ?) ; beyond the 6 quadrangular costals nothing is yet 

 known. 



Parisocrinus radiatus—8 ; after de Koninck and Le Hon, Recherches sur 

 les Crin. carb. Belgique, pi. i. fig. 12 b. 



Phialocrinus — 15. 



Philocrinus — 16. 



Poteriocrinus — 12. 



Proclivocrinus — as Calceocrinus, q. v. 



Seaphiocrimis Swattovi— 12 ; in this sp. the ossicles interlock towards tips 

 of arms; after Whitfield, Amer. Mus. Nat. Hist. N. Y. Bull. i. 

 December 1881, sub Poteriocr. Jesupi. For clearness' sake the 

 pinnules are only shown along one set of branches. 



Scytalecrinus — 15. 



Sicyocrinus — 9. 



Sphcerocrinus — 3. 



Stemmatocrinus— -18. See Trautschold, " Mon. Kalkbr. Mjatschkowa," 

 Mem. Soc. Imp. Nat. Moscou, xiv. pi. xiv. fig. 12 (1879). 



Streptocrinus — 8, but not much known of arms. 



Synyphocrinus — vide sub Bursacrimts. 



tribracMocrhms — arms unknown except so far as shown in PI. XIV. fig. 35. 

 Vasocrinus — 10 ; 3 costals ; arms and armlets less robuat. 

 Woodocrimts macrodactyhts — 16 ; after de Koninck, Mem. Acad. Roy. 

 Belgique, xxviii. pi. viii. fig. 1 c (1854). For clearness' sake the 

 pinnules are only shown along one branch. 

 Zeacrinm — 16 ; dichotomize towards inner side of ray ; ossicles short, 

 their width diminishes by J in successive orders ; arms meet 

 laterally, cf. Bursacrinus. 



XLIX. — On some new and imperfectly -defined Species of 

 Jurassic, Cretaceous, and Tertiary Nautili contained in tlte 

 British Museum {Natural History). By Arthur H. 

 Foord, F.G.S., and G. C. Crick, Assoc.RS.M., F.G.S., 

 Assistant in the Geological Department, British Museum. 



In the last number of this Magazine we described and re- 

 defined some species of Jurassic Nautili in the British Museum. 

 In this article we complete for the present our work upon the 

 Jurassic and take up the Cretaceous and Tertiary species. 

 Since the former paper was published some Jurassic forms 

 have been added, enabling us to describe a new species from 

 the Lower Oolite. 



Appended is a list (pp. 390 and 391) of all the Cretaceous 

 and Tertiary Nautili now in the Museum, together with the 

 new Jurassic species. The species are arranged in two 



