414 G. C. C rich— On Goniatites, Nautilus, etc. 



figured two Belgian specimens winch he referred to Phillips' 

 evolntiis. He adopted D'Orbigny's generic designation, and united 

 with this species his previously described Nautilus Omalianus, 

 Whilst recognizing their generic affinity. Prof. Hyatt 1 appears to 

 consider the examples referred by De Koninck to evolutus to be 

 specificallj' distinct from Phillips' species, and for the Belgian form 

 proposes the name S. gibbosa. He also considers Nautilus Omalianus 

 to be specifically, though not generically, distinct from both. 



In 1836, Prof. Phillips 2 also described and figured from the 

 Carboniferous Limestone the species Nautilus tetragonus, which in 

 1854 Prof. Morris 3 referred to M'Coy's Discites* regarding the 

 latter as a subgenus of Nautilus. 



Foord, 5 in 1891, considered Nautilus tetragonus, Phillips, and 

 Nautilus Omalianus, De Koninck, to be identical; and, referring 

 the species to M'Coy's Discifps, accepted De Koninck's specific 

 name, remarking that "according to the strict letter of the law 

 of priority, Phillips' name should be adopted for this species, but 

 his description and figures are so defective that it would be cpiite 

 impossible to recognize the fossil thereby." 



Phillips described his Goniatites evolutus as follows: "Volutions 

 apparent, their section round in young, oblong in old whorls ; septa 

 with a deep, acute, dorsal sinus, and obtuse-angled first lateral lobe," 

 giving as the locality " Flasby, etc." Of the specimens which he 

 figured, the original of figs. 66, 67, and 68, is in the York Museum. 6 

 The writer is greatly indebted to the authorities of that Museum for 

 the loan of the specimen ; it is only the internal cast of four loculi, 

 but a careful examination of the fossil has enabled him to identify 

 with Phillips' species a splendidly preserved example, now in the 

 Gilbertson collection in the British Museum. 7 



Of Nautilus tetragonus, Phillips gave the following description :' 

 " Flat, discoidal, whorls tetragonal, back slightly concave, with a 

 small spiral ridge within the angles ; sti'ias bent, sharp, rising into 

 plaits on the edges ; septa concave outwardly ; (oblique undulations 

 on the sides of the cast). Var. /3, inner edges rounded"; and he 

 mentioned as localities " Kulkeagh ; Bolland ; Northumberland." 

 The description is accompanied by figures of at least three specimens, 

 one of which (pi. xvii, figs. 26, 27) is, however, doubtfully referred 

 to this species." The writer has been able to examine only one of 



1 A. Hyatt, "Carboniferous Cephalopods," Second Paper : 4th Ann. Rep. Geol. 

 Surv. Texas, 1892 (1893), p. 414. 



2 Op. cit., pt. ii, 1836, p. 233, pi. xxii, figs. 33, 34 ; pi. xvii, fig. 24 (26? 27? 

 in explanation of plate on p. 250). 



3 " Cat. Brit. Foss.," 2nd ed., 1854, p. 309. 



4 F. M'Coy, " Synop. Garb. Foss. Ireland," 1844, p. 17. 



5 " Cat. Foss. Ceph. British Museum," pt. ii, 1891, p. 87. 



6 H. M. Platnauer, " List of Figured Specimens in York Museum " : Arm. Eep. 

 Yorks. Pbilos. Soc. 1890, p. 79. The locality there given ("Flaxby") is an 

 error ; Mr. Platnauer informs me that it should have been " Flasby." 



• B.M. No. C. 5336. 



a A specimen in the Gilbertson collection in the British Museum (Xo. C. 2370 I s 

 believed to be this figured example. It is but a fragment, and greatly resembles 

 "Nautilus subsulcalus," Phillips ( = Ccelo>iautilus subsulcatus). It certainly does 





