CONCHOLOGY.— GLOSSARY. 



107 



Hippo'nyx. — From the Greek, ippos, 

 a horse, and onux, nail. Name of 

 a genus of gasteropods (page 58). 



Hyal^'a. — From the Greek, ualos, 

 glass. A genus of beautiful ptero- 

 pods, remarkable for the trans- 

 parency and delicacy of the shell 

 (page 67). 



Hyda'tis. — Latin. Formed from the 

 Greek, vdor, water. Specific name 

 of a mollusk. 



Im'bricate. — Placed like the tiles of a 

 house. 



Inclu'sa. — From the Latin, includo, 

 I enclose. Name of a tribe of 

 acephalous mollusks, 



Incurv'ed. — When a part is turned 

 inwards. 



Ine'quilateral. — When the anterior 

 and posterior sides make different 

 angles with the hinge. 



Ine'quivalve. — Where one valve is 

 more convex than the other, or dis- 

 similar in other respects, as in the 

 common oyster. 



In'ferobranchia'ta. — From the Lat- 

 in, inferus, below, and branchia, 

 gills. Name of an order of gas- 

 teropods which have the branchiae 

 below the mantle (page 62). 



Inte'gument. — F-rom the Latin, te. 

 gere, to cover, the covering, the 

 skin. 



In'terganglio'nic. — Applied to 

 nerves which are between ganglia. 



In'ternode. — The space between one 

 knot or joint and another. 



Interru'pted. — Divided, separated. 



Intor'ta. — Latin. Twisted inwards. 



Invertebra'ta. — Latin. Formed of 

 in, without, and vertebra, a bone 

 or joint of the spine or back-bone. 

 A division of the animal kingdom, 

 embracing mollusks, insects, and 

 other animals which have no ver- 

 tebrae, or internal bony skeleton. 



Inve'rtebrate. — Without vertebrae. 



In'volute. — Having the exterior lip 

 turned inwards at the margin, as 

 in the Cyprseae. 



Involu'tion. — That part which in. 

 volves or inwraps another. 



Iso'cardia. — From the Greek, isos, 

 like, and kardia, heart. Name of 

 a genus of Chama'cea (page 82). 



Iso'cARDiiE. — Plural of Isocardia. 



Janthi'na. — From the Greek, ianthon^ 



violet colour. A genus of the 



family of Trochoides. 

 La'bial. — From the Latin, labium^ 



lip. Belonging or relating to the 



lips. 

 Laci'niate. — Jagged, or cut into ir- 

 regular segments. 

 La'cunose, — Having the surface 



covered with pits. 

 Lame'lla. — Latin. A little thin plate 



or piece. 

 Lame'lla, — Plural of lamella. 

 Lame'llibra'nchiata — From the 



Latin, lamella, a thin plate, and 



branchia, gills. An order of aceph- 



alous mollusks. 

 Lame'llibranch. — Belonging to the 



lame 'llibra'nchiata. 

 La'mina. — Latin. A plate, or thin 



piece of metal or bone. 

 La'mina. — Plural of lamina. 

 La'minated. — Divided into distinct 



laminae. 

 Lapi'llus. — Latin. A little stone. 

 Lenti'cular. — From the Latin, len. 



ticula, a little lens, a lentil. 



Shaped like a lens. 

 Li'ma. — Latin. A file. Name of a 



genus of the family of Ostracea. 

 Li'max. — Latin. A slug, a snail, i 

 Lima'ces. — Plural of limax. 

 Limb. — The margin of bivalve shells. 

 Limn^'a. — From the Greek, liinne, a 



pool. Name of a genus of fresh- 

 water snails. 

 Li'near. — Composed of lines. 

 Li'neate. — Marked with lines. 

 Li'ngula. — Latin. A little tongue. 



Name of a genus of bivalves (page 



89). 

 Li'ngula. — Plural of Lingula. 

 Litho'domus, — From the Greek, 



lithos, stone, and dond, I build. 



Name of a genus of bivalves found 



in rocks and stones, inhabiting 



cavities which they form for that 



purpose. 

 Litho'domi. — Plural of Lithodomus. 

 Li'ttoral. — Belonging to the shore. 

 Littori'na. — From the Latin, litus, 



the sea-shore. A genus of the 



family of Trochoides (page 49). 

 Litto'reus. — Latin. Belonging or 



relating to the sea-shore. 



