univalves

The outside had already been coated by a few kinds of barnacles and other univalves.

Brian D. McLaren: Around Every Evil There Gathers Love 2010

Most species of univalves are wanderers, many bivalves are free, and multivalves become fixed at an early stage of existence.

Tropic Days 2003

The hard parts of the many animals which live upon the reef become imbedded in this coral limestone, so that a block may be full of shells of bivalves and univalves, or of sea urchins; and even sometimes encloses the eggs of turtles in a state of petrification.

Autobiography and Selected Essays 2003

The non-spiral univalves and bivalves are in some respect similar in construction, and in some respects dissimilar, to the spiral testaceans.

The History of Animals 2002

This mecon in the turbinated genera is lodged in the spiral part of the shell, while in univalves, such as limpets, it occupies the fundus, and in bivalves is placed near the hinge, the so-called ovum lying on the right; while on the opposite side is the vent.

On the Parts of Animals 2002

And there is not much difference between most of the univalves and bivalves; but, while those that open and shut differ from one another but slightly, they differ considerably from such as are incapable of motion.

The History of Animals 2002

For there are those with turbinate shells, of which some have just been mentioned; and, besides these, there are bivalves and univalves.

On the Parts of Animals 2002

The bivalves, scallops and mussels, for instance, are protected by the power they have of closing their valves; and the Turbinata by the operculum just mentioned, which transforms them, as it were, crom univalves into bivalves.

On the Parts of Animals 2002

In the case of the univalves and the bivalves, the fleshy substance adheres to the shell so tenaciously that it can only be removed by an effort; in the case of the stromboids, it is more loosely attached.

The History of Animals 2002

Gibbosa, Mytilus Imbricatus, Pholadomya (two kinds), Trigonia costata; of univalves, Natica (two kinds), Nerinea Cingenda; of fishes, Strophodus

Records of Woodhall Spa and Neighbourhood Historical, Anecdotal, Physiographical, and Archaeological, with Other Matter James Conway Walter