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Laguna Marine Laboratorp 
Laila cockerelli MacFarland 
(Figure 39A) 
Color translucent whitish. Branchie and clavate papille tipped 
with orange red. Rhinophores orange red with white bases. Numer- 
ous small orange red tubercles on the dorsum. Orange red marking 
also occur on the tail. The one specimen taken differed from Mac- 
Farland’s description in having two instead of five branchial plumes, 
but this is of little moment since the branchie are constantly subject 
to injury. 
Genus and Species? 
(Figure 39 EH) 
Color white, with two black stripes from mouth to rhinophores, 
where they unite and pass as one to the branchiew. Sides irregularly 
marked with black stripes and spots. Tentacles yellow. Rhinophores 
black, tipped with yellow. Bordering the black stripes are various 
spots and stripes of yellow. Many of the yellow spots occur on small 
tubercles. The branchizw are black, tipped with yellow. 
Rhinophores foliate and retractile into small sheaths. Branchie 
seven, and also foliate and retractile. Six short tentacle-like pro- 
cesses on the head, which are joined by a thin prolongation of the 
mantle edge, this being practically all of the mantle that is evident. 
Head large and truncated. Length about 7 mm. 
Doriopsis fulva MacFarland 
( Figure 38 B) 
Color lemon yellow. Mantle thickly covered with small white- 
tipped tubercles. Rhinophores brownish. Branchie a paler yellow 
than dorsum. Front edge of foot deeply bilobed. No notch on upper 
lip. Rhinophores and branchie retractile into small smooth edged 
sheaths. Tentacles rudimentary, attached to lateral folds on the 
sides of the mouth. Length 9 mm. Frequent under stones between 
tides. Doubtless the determination of this would not be sure with- 
out a comparison of the internal anatomy. 
Rostanga pulchra MacFarland 
(Figure 38 A) 
Color orange red, the foot pinkish. Rhinophores darker than 
mantle. Anterior margin of foot bilobed. Upper lip notched. Ten- 
tacles small. Rhinophores very short and completely retractile. 
Mantle covered with short spiculate papilla. Length 5 mm. Found 
under stones, thus differing in habit from the species as described 
by MacFarland for he records it from a red sponge. 
