CHEVRONS.

As the skeleton of the typical form _arnuxii_ has been described in

considerable detail and accurately figured by Flower and by Van Beneden

and Gervais, it is not considered necessary to give a complete

description of that of _bairdii_ in this place. The entire skeleton and

many of the separate bones are figured in Pls. 42, 32, and 33. The

phalanges are lacking altogether, or are incompletely represented, in the

various skeletons of _bairdii_, and for that reason the phalangeal

formula can not be given. The chevrons number ten in the skeleton from

Centerville beach, California (Cat. No. 49725). Both Flower and Van

Beneden and Gervais give nine chevrons as the number for the skeleton of

_arnuxii_ in the Hunterian Museum, London, but the latter authors have

added a tenth in outline in the figure of the skeleton of that species

which is in the Paris Museum. Ten are mentioned by Hector as the correct

number for the skeleton of _arnuxii_ from Wellington Harbor examined by

him.[61]