CHAPTER VIII. 



GLOSSARY, 



Aberrant differing from the type. Abnormal differing from the rule. 



Abranchiate without gills. Abrade to wear away. 



Abyssal pertaining to the deep sea. Acephalous headless. 



Acetabula the suckers of a cephalopod. Aculeated ending in a point. 



Acuminate taper pointed. Acute forming a sharp angle or point. 



Adductor the muscle which draws together the valves of a bivalve. 



Albino -the white variety of any species. Alliaceous smelling of garlic. 



Amorphous of no regular form. 



Amphineura an order of the Gastropoda, having the nerves on both sides. 



AmpullaceOUS in the form of a flask. 



Androgynous having the sexes united in each individual. 



AngUlated having angles. Anterior the front or forepart. 



Aperture the mouth of a shell. Apex the top of the spire. 



Apical belonging to the apex. Articulated jointed. 



Ascoglossa a sub-order of Opisthobranchs having the worn-out teeth not dropping off 



but retained in a special sac. 



Attenuated gradually tapering to a point. Auriculated shaped like an ear. 

 Axis the pillar the whorls of a shell are twisted round. 

 AzygObranchiate having but one gill, and not a pair equal in size as if they were the 



arms of a yoke. 



Bidentate having two teeth. Bifid cleft into two parts. 

 Bilateral with two symmetrical sides. Bilobed with two lobes. 

 Bivalve composed of two plates or valves. 



BOSS the umbo or beak of a bivalve shell. Brackish moderately salt. 

 Branchia a respiratory organ adapted to breathe air dissolved in water ; a gill. 

 Branchial belonging to the gills. Branchiate possessing gills. 

 Buccal connected with the mouth. 

 BysSUS the silky filaments by which certain bivalves attach themselves to foreign 



substances. 



CadUCOUS falling off at certain seasons. Calcareous limy. 

 CanaliCUlated made like a groove. Cancellated cross-barred. 

 Caperate -wrinkled. Cardinal belonging to the hinge. 

 Carinated keeled. Cephalic belonging to the head. 

 Cinereous ash-coloured. CirrhUS a filamentary tentacle. 

 CladOhepatiC having a branching liver. 

 Clausilium a shelly plate attached to the pillar by an elastic ligament, and protecting 



the entrance to the shell. 



Clavate club-shaped. Columella the pillar round which the whorls wind. 

 Compressed flattened. Concave rounded inwards. 



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