THE FAUNA OF THE ST. JOHN GEOUP. 83 



Plate VI. 



Fio. 1. — H[/oKthes [Camerotheca) Daniana, 1, shewing ventral side and aperture. — la, immature individual H having 

 transverse films of oxide of iron (marking diaphragms ?) near the apex, ventral aspect. — 16, operculum 

 f( mnd witli this species seen from inner side, ';. — Ic, cast of inside of an operculum found witli this species, 

 t. All from Div.l.d. Seo p. 49. 



Fifi. 2. — Hijolithes {Cunurothcca) gracilis, n. sp., i, doreal side, shewing septa ne;ir the apex, and annular lines of growth 

 on the ventral side, toward the ajjerture. — 2a, young individual, dorsal aspect, showing i^hragmated tube 

 at the apex. — 26. operculum found in the layers of shale with this species, î. All from Div. l.rf. See 

 1>. 50. 



Fid. "■ — HijoUlhis (CUmcrollieca) Micmiic, ?, dorsal aspect shewing striated interior on the ventral side, and the fun- 

 nel-shaped aperture.— :>(, another individual flexed at the base and shewing annulations of growth, t.— 

 N.B. The operculum 26, if not of the preceding species probably belongs to thi.s. Both from Div- \.d. 

 See p. 51. 



Fif!. 4. — Diphlhcca Hi/altiana, n. sp., i , dorsal aspect, the shell abraded and shewing the septa near the apex, and the 

 phragmated space beside the Ijody cavity, the diaphragms are preserved along the right side of the tube. 

 — 4a, profile of the same shewing the flexed apex. From Div. 1.6'. See p. 53. 



Fic;. 5. — Diplolheca Hyattiana, var. caudaia, ?, ventral aspect, shewing the flexible annulated tube at the apex. — la, 

 operculum, 'i, seen from the inside ; this operculum has been found in tlie mouth of the shell. Both from 

 Div. l.d. See p. 5.1. 



Fin. (1. — Diphlhcca ylforfiVa, llartt, ;, dorsal aspect, shewing impression resembling a siphon, also sutures of dia- 

 phragms in the body-cavity, and lateral ridges corresponding to the dorsal edges of the lateral skeleton 

 beside the body cavity. — 6a, operculum found in the shale withtliis species, seen from the inside. Both 

 from Div.l.d See p. 54. 



Fin. 7. — Diplolhcca Acadicd, var. .'erlcca, ], ventral aspect. — 7«, operculum of this variety, exterior aspect. — 76, same 

 seen in profile- Both from Div. l.(?. See p. 55. 



Fig. 8. — Diplotluca Acudica, var. obtufa, -], ventral aspect. From Div. I.e. See p. 55. 



Fin. 9. — Diplolhcca Acadica, var. erai-ga, [, dorsal aspect, shell abraded and shewing the lateral edges of the phragmated 

 space beside the body cavity, and a few septa near the apex of the shell. From Div. 1.61 See p. 55. 



Fig. lO.—Slcnolheca {Parmophonlla) Acadica, Hartt, sp., t, seen from above.— 10a, same, lateral view. — 106, a more 

 tumid individual with outer half of the shell striated only. Both from Div. l.c'.— Ic, young individual 

 shewing the muscular scar and other features of the interior. ". From Div. l.o-. See p. 50. 



Fig. 11. — Stenothcca conccnlricc, n. sp., ']. From Div. l.rf. See p. 57. 



F"iG. 12.Stcnothcm radiaia, n. sp., \". From Div. I.e. See p. 57. 



Fig. 13. — Stenothcca nasvta, n. sp., -^. From Div. I.e. See p. 58. 



Fig. lA.— Stenothcca Hicksiana, n. sp., 1. From Div. l.(/. See p. 56. 



Fig. \?i.Stenotlieca triangidaris, n. sp., |, shewing the free tubular apex.— 15a, same, aspect of the interior, with 

 cavities along the dorsal line. From Div. l.c-. See p. 58. 



Fig. W.—Lepiditta alata, n. gen. et sp., ",", outer surface of the left valve.— Ifia, cast of interior of right valve. Both 

 from Div- l.e-. See p. 61. 



Fig. 17. — Lcpiditta curia, n. sp, -f, inside (jf the left valve- From Div. l.e?. See p. 62. 



Fig. IS.—LepidiUaanomala, n. gen. et sp., ',^, left valve shewing foramen and furrow.— 18a, inside of same valve.— 

 186, right valve, interior ?— 18e, another right valve?. All from Div. l.c-. See p. 62. 



