392 SIR C. ELIUT t)\ NUDIUKAXCUS [jMur. 1, 



7. Chromodobis vicixa. 



Chromodoris vicina Eliot, Abstr. P. Z. S. 1904, No. 4, p. 15, 

 March 8. 



Twelve specimens fi-om Cliuaka. 



The following notes were made on the living animal : — 



" Mantle and foot bordered with light violet, the latter border 

 a row of dots. Middle of back drab-brown with bright violet 

 spots, the larger ones with a white centre. Near the edge of 

 the mantle a number of yellow spots with white borders, which 

 are often confluent. The foot deep and nai-i'ow, white with 

 some yellow spots near the lower edge. The rhinophores dark 

 brown with white tips. Each of the branchio? bore two black 

 bands." 



The alcoholic specimens are of a dull i-eddish In-own and present 

 two very diffei'ent forms : one long and nari'ow, measui'ing 37 mm. 

 in length and 9 mm. in breadth, and the other oval, being 27 mm. 

 long and 20 broad. Both are about 20 mm. high. The mai-gin 

 of the mantle is about 6 mm. wide, and forms a sort of hood over 

 the head. The branchial opening is veiy small. Both it and the 

 i-hinophore openings are slightly i-aised. The bi'anchite are 16 in 

 number, the circuit is open beliind, and the row of plumes turns 

 inwards in a small spiral. The foot is long and narrow. In the long 

 form of the animal it jn^ojects about 5 mm. beyond the mantle ; 

 in the broad foi'm it is covei-ed by it. The anterior margin is 

 rounded and grooved, but not notched. On each side of the mouth 

 is a small conical tentacle. 



The labial arma,ture consists of two yellowish plates composed of 

 i-ather long rods, bifid at the tip and generally Ijent into the form 

 of hooks, but sometimes sti-aight. These are nuich like the same 

 organs in Chr. striatella [vide Bergh, ' Challenger ' Reports). The 

 formula of the radula is about 50 X 45.0.45. The rhachis is bare 

 but exhibits in places a slight Avavy fold. The innermost teeth 

 bear thi-ee denticles on each side of the centi-al cusp. The next 

 tAvo or thi'ee are of much the same shape, but denticulate only on 

 the outei- side. The majority are tall and straight, bearing five 

 large and distinct denticles under the terminal hook, and some- 

 times two or three small iiregular denticles in addition. The five 

 or six outermost ai-e irregidai- in shape, and beiU' fi-om thi'ee to 

 six irregular denticulations mostly on the apex. 



This species is closely allied to Chr. tryoni, and will not im- 

 probably prove to be a mere variety of it. All the pi-esent 

 specimens, hoAvever, have a somewhat different coloi-ation, fcAver 

 branchiae, and more numerous denticles on the teeth. 



8. Chromodoris elizabetuixaB., A-ar. africaxa. (Plate XXIV. 

 fig. 4.) 



Tavo specimens from the East Coast of Zanzibar. Tlie notes on 

 the living animal describe the dorsal surface as black and Avhite, 

 black prepoaidcrating. The mantle had a double boi'der. yellow 



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