NOTES ON A COLLECTION OF CALIFORNL\N NUDIBRANCHS. 43 



There are only four pleural teeth, of which three are hamate and the fourth 

 low and less perfectly formed. The uncini are 8, and much as described for 

 Triopha m<u:ulata by MacFarland. 



This form does not completely correspond with any of the described 

 species, but as there are no notes on the living animal, and the specimen is 

 ill-preserved and probably immature, it is not advisable to make it the type 

 of a new species. 



The known species are : — • 



1. Triopha carpe uteri, (Stearns) ^ MacFarland regards these two 



2. T. )ii(j(Jesta, Bergh. j as distinct. 



3. 7'. inandata, Mac Farland. 



4. T. (jraniJi.-^, Mac Farland. 



rhe genus is recorded only from the west Coast of North America. 



Laila eoekerelll, MacP'arland. 



MacFarland : Prelim, account of the Dorididae of Monterey, 

 pp. 46, 47. 



The type of this form is from Monterey Bay, but numerous specimens 

 obtained by Cockerell agree with it, except that they are smaller, the largest 

 being 1 2 millim. long and 4 broad. One specimen preserved differently from 

 the others appears to have kept its natural colour. The body is whitish, the 

 the numerous spicula being seen clearly through the skin. The tips of all 

 the papillae are of a deep brilliant orange ; the five non-retractile branchiae 

 are tipped with the same colour. The dorsal tubercles and rhinophores are 

 of a lighter yellowish orange. 



There are about 30 club shaped papillae on each side of the body 

 arranged in thickly set oblique rows containing 2 — 3 or rarely 4 papillae each. 

 In the centre of each papilla is a column of spicules, which can be seen 

 through the transparent integuments. Two small tubercles stand in front of 

 the branchiae, and others form a row down the centre of the bnck with a few 

 scattered smaller ones at the sides. The whole dorsal surface is thickly and 

 visibly spiculous, the spicules being usually swollen in the middle, and some- 

 times almost cruciform. The frontal veil is wide and prominent, bearing 

 pai)illae like those on the dorsal margin. The anterior margin of the foot is 

 abru[)tly truncate. On each side of the front part of the body is a short pro- 

 jecting ridge, situated just below the margin of the mantle and running back 

 a little way from the oral tentacles. No trace of mandibles or a labial arma- 

 ture c(juld \k- found. 



The radula consists in the largest specimens cjf nearly a hundred rows 

 of colourless teeth. The narrow rhachis, which lies in a rather deip groove, 

 bears a single series of Hat (juadrangnliir plates. 'l"he innermost tooth is 

 simply hamate, slender and very hard to see. The second tooth is large and 

 strong with two hamate cusps ; then follow nine or ten uncinal teeth, fattened 



