JLaguna S^arine Laboratory 77 



Laila cockerelli MacFarland 



(Figure 39A) 



Color translucent whitish. Branchiae and clavate papillae 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- 

 Farlaud's description in having two instead of five branchial plumes, 

 but this is of little moment since the branchiae are constantly subject 

 to injury. 



Genus and Species? 

 (Figure 39 E) 



Color white, with two black stripes from mouth to rhinophores, 

 where they unite and pass as one to the branchiae. 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 branchiae are black, tipped with yellow. 



Rhinophores foliate and retractile into small sheaths. Branchiae 

 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. Rhmophores brownish. Branchiae a paler yellow 

 than dorsum. Front edge of foot deeply bilobed. No notch on upper 

 lip. Rhinophores and branchiae 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 papillae. 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. 



