[10.] [Dichelaspis orthogonia], (magnified six times.)

[10a.] [Dichelaspis orthogonia], carina, lateral view of.

[10b.] [Dichelaspis orthogonia], basal end of carina, viewed internally, much magnified.

[TAB. III.]

Fig.

[1.] [Oxynaspis celata], (magnified three times.)

[1a´.] [Oxynaspis celata], with the skin of the encrusting horny zoophyte removed. ([a]), scutum; ([b]), tergum; and ([c]), carina.

[2.] [Conchoderma virgata] (magnified twice.)

[2a.] [Conchoderma virgata] carina, viewed externally.

[2b.] [Conchoderma virgata] summit of capitulum, showing the terga from vertically above.