- any cephalopod of the genus Spirula, having a flat, spiral shell that is partly inside and partly outside the posterior part of the body.
Origin of spirula
Examples from the Web for spirula
Historical Examples of spirula
The latter is partly straight and partly convoluted, nearly as in Spirula.A Manual of Elementary Geology
They originate at the aboral extremity where they remain in Spirula (fig. 18).
A series of Chambers joining each other, as in Nautilus, Spirula, &c.A Conchological Manual
George Brettingham Sowerby
The E. spirula of certain Brazilian monkeys and of the Barbary ape bears a strong resemblance to the species from the hog.Parasites
T. Spencer Cobbold
In places in New Zealand, and elsewhere, large fossil deposits of Spirula peroni occur.Beautiful Shells of New Zealand
E. G. B. Moss
- a tropical cephalopod mollusc, Spirula peronii, having prominent eyes, short arms, and a small flattened spirally coiled internal shell: order Decapoda (cuttlefish and squids)