CRUSTACEA. 649 
Sp. Serolis Fabricti Lnacu, Cymothoa paradoxa FaBr., BUCKLAND Mineral. 
and Geology, London, 1836. Pl. 45, figs. 6, 7 (after a drawing by Curtis), 
Cov. R. Ani. éd. ill., Crust. Pl. 64, fig. 3, &c. This genus in the two 
longitudinal furrows on the back of the trunk bears a strong resemblance 
to the fossil Trilobites, but there is no proper affinity on this account. 
Family XVI. Spheromida. Body broad, oval, frequently con- 
tractile into a ball. Head large, broad. Feet not fixing themselves 
by hooks. Tail small, mostly composed of only two segments, the 
first five having coalesced to form one. The last pair of caudal 
feet with only a single moveable lamella extended near the outer 
side of pygidium. Foot-jaws resembling palps. 
Ancinus Epw. First and second pairs of feet terminated by a 
large moveable hook, subcheliform; remaining feet eressorial, 
slender, terminated by a straight claw. Body depressed, plane. 
Antenne long, setaceous. 
Sp. Ancinus depressus MitNE Epwarps, Hist. nat. des Crust. Pl. 32, fig. 17. 
Spheroma Latr. Feet of trunk all eressorial, slender, termi- 
nated by a short claw, often bifid. Body gibbous above, contrac- 
tile into a ball (Onisc¢ globatores). 
Sp. Spheroma serratum Leacu, Oniscus globator PALLas, Spicil. Zool. 1X. 
Tab. 4, fig. 18, Desmar., Crust. Pl. 47, fig. 1; from 2” to more than ie 
long, in the Atlantic ocean, the Mediterranean and the Black Sea. 
Note.—Genus Zuzara LEACH is scarcely distinct. 
Add sub-genera: Cymodocea Leacu, Nesea Luacu (and Cilicea 
ejusd.), Campecopea Leacu, Cerceis Epw., Amphoroidea Epw., Cassi- 
dina Epw. 
Family XVII. Pranizidea. First two segments of trunk in- 
distinct or joined with the head, destitute of feet. Five pairs of 
feet of trunk. Antenne four, setaceous, unequal. Posterior part 
of abdomen or tail with six segments, supplied with foliaceous 
appendages at the apex. 
Anceus Risso, Gnathia Leacu. Head large, almost square, 
armed anteriorly with two horns porrect, falcate (mandibles?). 
Sp. Anceus forficularius Risso, DESMAR., Crust. Pl. 46, fig. 7 (not fig. 6), 
Gusérin Iconogr., Crust. Pl. 27, fig. 7;—Anceus maaillaris LaM., Cancer 
maxillaris Monvaau, Linn. Trans. vu. 1804, Tab. vi. fig. 2, DESMAR. 
Crust. Pl. 46, fig. 6. 
