[2c.] [Conchoderma virgata] var. chelonophila, (magnified four times).

[2d.] [Conchoderma virgata] var. Olfersii, (scutum.)

[3.] [Conchoderma Hunteri], (magnified five times.)

[4.] [Conchoderma aurita], (nat. size,) with the rudimentary carina exhibited on the right hand.

[4a.] [Conchoderma aurita], summit of capitulum, viewed from vertically above, showing the ear-like appendages and the rudimentary terga.

[4b.] [Conchoderma aurita], section near the bases of the ear-like appendages, showing their folds.

[4c.] [Conchoderma aurita], (var.), scutum.

[5.] [Alepas minuta], (magnified five times.)

[6.] [Alepas cornuta], (magnified five times.)