SUPPLEMENT.— PSEUDOG RAMMOCERAS. cxliii 



Canavaeina venustula (8. Buchnau). Plate XXXI, figs. 5, 6 (type) ; Figs. 1 — 1 2 r ; 



Suppl., Figs. 131, 132, p. clxvii. 



1890. Grammoceras subserrodens, This Monogr., PI. xxxi, figs. 5, 6 ; 10 — 12 ? 



p. 179 (pars). 

 1902. Canavaria venustula, Emend. Amm. Nom., p. 3. 



Description. — Striate (coarsely) ; gradumbilicate ; periphery fastigate, carina 

 distinct, subacute. 



Distinction. — From 0. Steinmanni, to which it lias much likeness — the smaller, 

 finer character of the ornament, the more acute periphery, and rather less thickened 

 carina. 



Remarks. — The identification with Branco's Amaltheus subserrodens, though 

 justified by the general shape, is vitiated by the coarser ornament. Branco's 

 figure shows a smooth shell ; his description speaks only of " fine growth-lines." 



Date of Existence. — Aalensis hemera. 



5. Canavaeina?, sp. Plate XIII, figs. 4, 5; Suppl., Fig. 133, p. clxvii. 



1888. Lioceras opalinum, This Monogr., PI. xiii, figs. 4, 5 ; p. 35 (pars). 



Remarks.-— Possibly an involute development of C. venustula, and agrees there- 

 with in its radial line. 



The radial line is not so much curved laterally as in Lioceras opalinum. 



Locality and Stratum'. — Gloucestershire : Coaley Wood, at base of hard capping 

 of Cephalopod Bed (not in hard bed). 



Date of Existence. — Aalensis hemera (or ? Opaliniformis). 



B. Septicarinate. 1 

 a. Non-tiibercitlate. 

 LIX. Genus — Pseudogrammoceeas, 8. Buchman. 



(Type : Pseudogrammoceras regale, sp. n.) 



1901. Pseudogrammoceras, Proc. Cotteswold Club, vol. xiv, p. 266. 



1902. Pseudogrammoceras, Emend. Amm. Nona., p. 4. 



Definition. — Subplaty-subleptogyral ; latumbilicate ; subdensiseptate, sublongi- 

 sublatilobate ; laterally flexiradiate ; peripherally acutanguliradiate, convex to 

 convexifastigate, altisepticarinate. 2 (Radial line, fig. 134, p. clxvii.) 



Distinction. — From most of the genera of the Hildoceratidse — the septicarina. 

 From genera possessing this character, from Lillia, Haugia, etc. — the developed 



1 Certain otherwise similar species are included which, on account perhaps of degeneration, do 

 not show a definite septicarina. (See p. cliii.) 



2 Carina bordered by sulci in some species. 



