SYNOPSIS. 



Sub-Kingdom — Mollusca. 

 Class — Gasteropoda. 



Order— NUDIBRANCHIATA. 



Fam. 1. DoRlDIDJS. Branchiae plumose, surrounding the vent on the medio-dorsal line. Skin 

 spiculose. 



Sub-Fam. Doridin^e. Cloak ample, with an entire margin. 



Genus 1. DORIS, Linn^us. 



Cloak covering the head and foot. Dorsal tentacles 2, laminated, retractile within cavities. 

 Oral tentacles 2, various, or wanting. Fam. 1, Plates 1 and 2. 



Section 1 . Branchiae united at the base and retractile within a cavity ; body more or less 

 depressed ; with oral tentacles. Doris, proper. 

 Tongue broad, with numerous lateral spines and occasionally a central one. 



* Oral tentacles tubercular. 



Lingual spines uniform : no central spine. 

 a. Lingual spines stout, plain. 



1. D. tuberculata, Cuv. Orange or yellow, usually blotched with brown or olive ; cloak covered with 



unequal flattish tubercles ; dorsal tentacles conical ; branchial plumes 9, tripinnate, large 

 and spreading. Length 2 to 3 inches. PL 3. 



2. D. flammea, Aid. and Hanc. Scarlet, occasionally blotched with purple; cloak covered with mode- 



rately sized, unequal, flattish tubercles; dorsal tentacles conical; branchial plumes 9, tri- 

 pinnate, not spreading. Length 1 inch. PI, 4. 



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