Hln^ei cf Brliifi Bivalve ^bctti, I73 



(b) The conefponding dcprcflion. (c) A fmall tooth 

 on one fide of it. 

 ^'%' 3» 4' The hinge of the A/)'j^rf;7tf;7i7. (a) The great tooth. (I))A 

 ridge grooved longitudinally, (c) A Itiiall ciirv e in the 

 margin, (d) The cavity for the reception of tJie toorh. 

 5, 6. The hinge of the My a nmrgarJtifera. (a) The rugged tooth.- 

 (b) Its cavity, (c) A fliarp ridge on one fide of it^ 

 which pafles into the cavity (d). 



7. The hinge of the Mya piB'^rum, (a. a) The indented 



teeth, (b. b) The remote teeth. 



8. A fide view of one valve of the fame. 



9. The hinge of the Sokn Sillqua» 



10. The hinge of the S. Vaginn, 



11. S. pelhicidus. (a) The bifurcated tooth, (b.b) The two 



other teeth in the fame valve, (c) Tlie two oppofitc 

 teeth. 



Tab. XV. 



1,2. The hinge ^ t he ^PiHima~fit*HaM» 



3, 4. The fame magnified*, (a. a) The large tooth in each 

 valve, (b.b Two fmall teeth, (c) The lateral tooth. 

 5, 6. The hinge of the Teliina incaniata, 

 , 7,8. The fame magnified, (a. a) The two large teeth. (b.b)The 

 two fmaller ones. When the fhell is placed horizon- 

 tally thcfe teeth appear very prominent, and the 

 fulcus m the large tooth is very apparent, 

 9, 10. The hinge of the TeWna cornea. 



* The (hcUs were, for the mofl part, magnified by Ellis's Cngk Aquatic Microfcope, 



Fig 



