Sanguinolaria. 



CONCHIFERA. 



219 



GendsXLV.— SANGUINOLARIA.— Za>n<jrc/5-. 



Shell equivalve, inequilateral, transverse, sub-elliptical, or 

 ovate; souietimes transversely oblong, compressed, and for the 

 most part thin, and generally covered with a glossy, olivaceous 

 epidermis ; length of the two sides of each valve varying in 

 ditTeront species, and gaping at both extremities ; margins 

 generally rounded, but not parallel to each other ; both valves 

 provided with two eanliual teeth, but destitute of lateral teeth ; 

 ligament external, the fulcrum or space to which it is attached 

 generally prominent ; two very irregularly shaped, lateral, 

 muscular impressions in each valve, pallial impressions with a 

 large sinus. 



1. Sanguinolauia attenuata. — Attenuated Sanguino- 

 laria, pi. XC. fig. 11. 



S. attenuata. Portlock, Geo. Rep. p. 435, pi. 36, fig. 3. 



Much elongated transversely ; rounded at the anterior side, 

 and attenuated posteriorly ; rounded at the terminations ; sur- 

 face smooth ; destitute of a diagonal ridge. 



The Carboniferous Limestone, Errigle Keerogue, Tyrone, 

 Ireland. 



2. Sanguixolaria lirata. — The Ridged Sanguinolaria, 

 pi. XC. fig. 8. 



S. lirata. Phillips, Pal. Foss. p. 136, pi. 58, fig. 53*, a, h. 



Transversely elongated, width more than double the length ; 

 convex ; anteriorly rounded, and posteriorly sub-truncated and 

 ridged ; surf;ice smooth, with acute thread-like stri® parallel 

 to the margin ; strongest on the posterior portion. 



Devonian Rocks, Pilton, North Devonshire. 



3. Sanguinolaria vetusta. — The Ancient Sanguinolaria, 

 pi. XC. fig. 15. 



S. vetusta. Phillips, Geo. York, I. pi. li, fig. 1. 



Oblong ovate ; anteriorly short and narrowed, and long 

 and expanded posteriorly ; with strong, concentric lines of 

 growth. 



The Lias, Robin Hood's Bay, Yorkshire. 



4. Sanguinolaria Hollow atsii. — HoUoway's Sanguino- 

 laria. 



(S. Hollowaysii. Sowerby, II. p. 133, pi. 159. 



JIuch elongated transversely ; beaks very small, situate 

 near the posterior side, which is short ; anterior side lengthen- 

 ed and expan<lcd ; surface smooth, with rather short lines of 

 growth ; a furrow extends from the beak on the anterior side 

 to the margin ; shell thin. 



The London Clay, Bracklesham Bay. 



5. Sanoiinolarta co.mpressa. — Compressed Sanguino- 

 laria, pi. XC. fig. 20. 



S. coinpressa. Sowerby, V. p. 91, pi. 462. 



Transversely oblong ovate, compressed ; anterior side largest, 

 with a rounded truncation ; surface rather smooth ; several 

 obscure rays emanate from the beaks and terminate on the mar- 

 gins ; posterior side obliijuoly truncated ; shell thin. 



The London Clay, Barton and Bracklesham. 



6. Sanguinolaria tumida. — The Tumid Sanguinolaria, 

 pi. XC. fig. 1 3. 



S. tumida. Phillips, Geo. York, II. p. 208, pi. 5, fig. 5. 

 Transversely elongated ; diagonally gibbous ; hinge-line 

 straight ; surface supposed to bo imbricated. 



The Carboniferous Limestone, Bolland, Coalbrook Dale, 

 Kirby, Lonsdale, and Kildare, Ireland. 



7. Sanguinolaria arcuata. — The Arcuated Sanguino- 

 laria, pi. XC. fig. 16. 



S. arcuata. Phillips, Goo. Y'ork, II. p. 208, pi. 5, fig. 4. 



Transversely elongated ; anterior side short and attenuated ; 

 posteriorly lengthened and expanded; hinge-line arcuated ; 

 surface smooth. 



The Carboniferous Limestone, Harelaw, Northumberland. 



8. Sanguinolaria angustata. — The Narrowed Sanguino- 

 laria, pi. XC. fig. 12. 



iS. ariffustata. Phillips, Geo. Y'ork, II. p. 208, pi. 5, fig. 2. 



Much elongated transversely ; compressed ; posterior side 

 sraoolh, with a diagoual ridge from the beak to the margin ; 

 hinge-line straight ; surface with furrows parallel to the mar- 

 gin. 



The Carboniferous Limestone, Bolland. 



9. Sanguinolaria maxima. — The Large Sanguinolaria, 

 pi. XC. fig. 14. 



S. maxima. Portlock, Geo. Rep. p. 434, pi. 36, fig. I. 



Transversely elongated and sub-quadrate ; beaks situate 

 close to the anterior side, which is extremely short and nearly 

 square ; hinge and basal lines quite parallel ; surface with 

 many concentric furrows and striffi. 



The Carboniferous Limestone, Donaghery, Tyrone. 



10. Sanguinolaria oblonga. — The Oblong Sanguinolaria, 

 pi. XC. fig. 43. 



S. ohhnga. Portlock, Geo. Rep. p. 434, pi. 36, fig. 2. 



Transversely sub-quadrate ; anterior side extremely short, 

 the beaks close to that side, and rounded ; posterior side 

 lengthened, and nearly straight at the end ; hinge and basal 

 lines parallel ; surface concentrically furrowed and striated. 



The Carboniferous Limestone, Errigle and Keerogue, Tyrone. 



11. Sanguinolaria PLiCATA. — The Plaited Sanguinolaria, 

 pi. XC. fig. 19. 



S. pUcata. Portlock, Geo. Rep. p. 433, pi. 34, fig. 18. 



Transversely elongated ; compressed ; anteriorly rounded, 

 and obliquely sub-truncated posteriorly ; beak near the ante- 

 rior side, from which a faint ridge proceeds to the margin ; 

 hinge-line straight, with a slight furrow below it ; surface 

 with many transverse folds, parallel to the margin, until they 

 reach the ridge, where they run abruptly angular towards the 

 hinge-line. 



The Carboniferous Limestone, Benburb, Tyrone. 



12. Sanguinolaria undata. — The Waved Sanguinolaria. 

 S. undata. Portlock, Geo. Rep. p. 434, pi. 34, fig. 20. 

 Transversely elongated ; narrow ; hinge-line quite straight ; 



a furrow extends from the beak to the posterior margin below 

 and almost parallel to the hinge-line ; surface with broad fur- 

 rows. 



The Carboniferous Limestone, Tyrone and North Sunder- 

 land. 



13. Sanguinolaria transversa. — The Transverse San- 

 guinolaria, pi. XC. fig. 33. 



S. transversa. Portlock, Geo. Rep. p. 434, pi. 34, fig. 21. 



Extremely elongated transversely, compressed and short ; 

 antcrinrlv rounded and short ; beaks near to this side ; poste- 

 rior side much lengthened, obliquely truncated, with a diago- 

 nal ridge extending from the beaks to the margins ; hinge-line 



