78 jfir0t annual Report 



Doris sp. 

 (Figure 38 C) 



Mantle brown, bordered with yellow, and covered with small white 

 tuberc-les more thickly in the center than on the edges. Foot yellow, 

 branchiae light yellow. The branchiae and rhinophores are retractile 

 into smooth bordered sheaths. Body deep, with the dorsum highly 

 arched. Tentacles rudimentary. Length '27 mm. Common under 

 stones during July and August but rare in September. 



Cuthonia sp. 

 (Figure :'-! II) 



Color translucent whitish. Cerata translucent with a dark green 

 core. A dark green spot in front of the rhinophores. Length 5 mm. 



Cutting edge of mandible strongly denticulate. Uadula consisting of a single row of 

 plates. There are usually nine teeth on a plati . the mitral one not prominent, as short or 

 shorter than the prominent laterals. 



Hervia sp.? 

 (Figure :!! I) 



Color translucent whitish. Rhinophores orange, and with an 

 orange spot in front of them. Cerata with greenish-black cores, and 

 tipped with orange. Animal very slender, the body highest in the 

 region of the rhiuophores. Rhinophores and tentacles slender and 

 non-retractile. Length 7 mm. 



Cutting edge of mandible not toothed, strongly striated. Radula consisting of a single 

 row of plates, rsuallv eleven tt-eth on :i plate, tin- i t-ntr:il nitt prominent, the laterals Imi^ 

 . ;M I sli-inlpr. 



Hermissenda opalescens (1'noper). 



(Figure Mil J ) 



Color translucent whitish, with light brown stripes on tentacles 

 and tail. Orange markings occur on the head. Cerata translucent, 

 with brown cores and orange markings. Animal very slender. Cerata 

 numerous and very easily detached. Anterior margin of foot pro- 

 longed into two tentacle-like processes. Lips bilobed, the upper 

 narrow, the lower large. Common during the early part of the sum- 

 mer in tide-pools. 



Cutting edge of mandible with about thirty strong denticles. Radula consisting of a 

 single SITH-S nf an^ulaily urchnd plates. Thr central tuoth is large and finely denticulated 

 on the lower edge; the laterals are small, three to four on a side. 



Spurilla sp. 

 (Figure 39 K) 



Color white. Back and top of head orange with a finely granu- 

 lated appearance. Cerata near head orange with brown cores, those 

 farther back becoming browner. Tentacles white. Rhinophores 

 foliate, and red, with white tips. Animal slender, the foot large, 

 anterior margin slightly prolonged into tentacle-like processes. 

 Rhinophores and tentacles slightly contractile. Mouth large, under 

 lip bilobed, upper smooth. Cerata in constant motion and very easily 

 detached. Common in September. Length 15 mm. 



Cutting edge of mandible not toothed, strongly striated. Radula consisting of a single 

 series of low-arched, pectinate plates, notched in the center. 



