1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 199 
Order NUDIBRANCHIATA, Cuvier, 1817. 
Doris, Miller, 1776. 
Dermobranches (Dermobranchiata) a corps nu, Dumeril, 1806. 
Les Tritoniens (Tritoniacea), Lamarck, 1819. 
Hydrobranches (part of), Lamarck, 1819. 
Gymnobranchia, Schweigger, 1820. 
Notobranchia (part of), Bronn, 1862. 
Opisthobranchiate, hermaphrodite Mollusca, with the branchiz, if 
present, more or less exposed on the back or on the sides ; without 
shell when adult. 
Suborder I. ANTHoBRANCHIATA, Goldfuss, 1820. 
Cyclobranches (Cyclobranchiata), De Blainville, 1814. 
Pygobranchia, Gray, 1821. 
Doridide, Leach, 1820. 
Dorides, Férussac, 1821. 
Urobranchia, Latreille, 1825. 
Doridiea, Menke, 1828. 
Deride, D’Orbigny, 1837. 
Doridiacea, Philippi, 1853. 
Acanthobranchiata, Alder and Hancock, 1855. 
The branchiz more or less surrounding the anus upon the medio- 
dorsal line. 
Fam. I. DORIDIDA, Ald. & Hane. 1855. 
Doridini, Ehr. 1831. 
Doris bombées et planes, Cantr. 1840. 
Dorina, Macgillivray, 1543. 
Doridine, Ald. & Hane., 1845. 
Doridina, Gray, 1847. 
Mantle (notheum) large, without marginal appendages; skin 
generally very spiculose ; dorsal tentacles (rviinophora) laminate and 
retractile within cavities. 
The Dorididz may be classed under two sections or subfamilies :— 
§ 1. Those with the oral tentacles free ; and with the odontophore broad and 
bearing numerous spines in each transverse row. (PLATYGLOSSz£.) 
§ 2. Those with the oral tentacles united into an oral veil; and with the odon- 
tophore narrow and strap-shaped, and bearing but few spines in each 
transyerse row. (LEPTOGLOSS#). 
§ |. PLatyGLosss. 
Genus Doris, Linneeus, 1758. 
Argus, Bohadsch. 
Body depressed, or subconvex; integument spiculose; mantle 
often tuberculate, covering the head and the foot ; branchize plumose 
or ramose, united at the base, and retractile with the anus intoa 
common pallial cavity; mouth inferior, with two distinct oral ten- 
