64 G. F. MATTHEW ON THE 



Explanation of the Plates. 



Plate XII. 



Yig.'J..—Dictyonemaftabelliforme. Eichw. Whole liydrosoraa. Mag. f. From Div. 3c, Navy Island, St. Jolin 



Harbour. See p. 34. 

 Fig. 2. — Dictyonema flahellijorme. Eechiced !,. To show the shape of vasiform and funnel-formed hydrosomes. 

 Fig. 3. — Dictyoiuma ftahelliforme. Natural size. — 3a, bydrosome in the dichograptoid stage — 'ib, hydrosome in the 



second stage, when the cross-threads begin to appear. From Div. 3c, Navy Island. See p. 3§. 

 Fig. 4. — LingideUa hi'iin, n. sp. Nat. size- — 4a, interior of ventral valve — 4b, exterior of dorsal valve. From Div. 



3a, Carleton shore, St. John Harbour. See p. 39. 

 Fig. b.—Lingvlella Starri. Matt, var. minor. Mag. 1^. — .'i«, ventral valve— •'i'), dorsal valve. From Div. 2, Long 



Island, Kennebecasis River. See p. 58. 

 Pig. 6. — Obolus nfiUyenK, n. sp. Mag. t. — 6", ventral valve— 6/y, dorsal valve — 6c, interior of ventral valve, .showing 



the three diverging ridges, and showing : a', pedicel groove ; b', scars of posterior adductors ; c', outline 



of visceral cavity ; d', scar of central adjuster (?). — Gd, interior of dorsal valve, showing low median ridge 



and faint lateral ridges; also 6', scar of adductor muscle. See p. 44. 

 Fig. 7. — Linnarssonia (?) c. f. Bdti. Dav. Mag. f. — 7a, ventral valve — 76, dorsal valve — 7c, interior of ventral 



valve. From Div. 3c*, Navy Island. See p. 43. 

 Fig. 7d. — AcTOtri'ta Baileyi. Matt. ? Mag. f. — Mould of interior of dorsal valve. From Div. 3c'-, Navy Island. 



See p. 43. 

 Fig. S.—Oboldla (f) gemmula, n. sp. Mag. f. — 8a, ventral valve — 86, interior of ventral valve, showing central 



looped ridge and sinuate lateral ridges — 6c, interior of dorsal, showing short ridge at the umbo. From 



Div. 3c'', Navy Island. See p. 41. 

 Fig. 9. — Orlhis Icnticuiaris. Wahl. Mag. f. — 9a, usual form and size of ventral— 96, large form dorsal valve — 9c, 



mould of ventral, showing, a', adductor; 6', cardinal scars; o', ovarian spaces— 9rf, mould of dorsal, 



showing: 6', double scars of adductors ; o', ovarian spaces. See p. 46. 

 Fig. 10. — Orthis knlicularig, var. lyncioides, n. var. Mag. j, except 10a, which is 'i- — lOa, young shell, ventral, with 



sharp, distant ridges — 106, full-grown ventral, which became smooth in its later growth — 10c, same 



variety, dorsal valve. From Div. 3o, Germaine street. See p. 49. 

 Fi". 11. — Orthis lenliaduris, var. alrypoides, n. var. Mag. ?. — 11a, ventral valve — 116, dorsal valve. From Div. 3a, 



Germain-street. See p. 48. 

 Fig. 12. — Orlhis lentictdaris, var. stropliomenoidcs, n. var. Mag. ;. — 12a, ventral valve— 126, dorsal valve. From 



Div. 3a, Germaine street. See p. 49. 

 Fig. 13. — Orthidna f Johannensis, n. sp. Mag. f. — 13a, ventral valve— 136, profile showing hinge area of same — 



13c, dorsal valva From Div. 3a, Germaine street. See p. 49. 



Plate XIII. 



Fig. i.—Agnoslus piriformis. L. var. Mag. y.— la, head-shield — 16, pygidium. From Div. 2, Long Island. See 



p. 59. 

 Fig. 2.—Agnostus UhccIus, n. sp. Mag. t— 2a, head-shield— 26, pygidium. From Div. 36, Navy Island. See 



p. 50. 



Fig. Z.—Anomocare utenoloides. Matt. Mag. f.— 3a, head-.shield— 36, movable cheek— 3e, pygidium -3(i, supposed 

 hypostome. From Div. 2, I-ong Island. See p. 61. 



Pig i.—Anomocare Rphiiger. Matt. Mag. J. — 4a, head-shield — 46, same in profile — 4c, movable cheek — id, a 

 pleura— 4e, pygidium. Fro-n Div. 2, Long Island. See p. 61. 



j-jg. 5. — Paraboiina fpimdom. Wahl.— 5a, head-shield— 56, movable cheek; both natural size — 5c, pygidinm, 

 mag. 1 — hd, young pygidium, mag. f All from from Div. 3a, Germaine street. See p. 51 . 



Fig. 6. Paraboiina heres, Brog., var. lata, n. var. — 6a head-shield, full size— 66, head-shield 6c, movable cheek- 

 ed, hypostome— et, pygidium ; all mag. î — 6/, young individual, mag. f . All from Div. 36, Navy Island. 

 See p. 51. 



Fig. T.— Paraboiina lixres, var. grandis, n. var. Pygidium, nat. size. From Div. 36, Navy Island. See p. 53. 



