92 THE NAUTILUS. 



for the form of the rhinophores and tentacles, which are short, con- 

 ical, and strongly transversely wrinkled, hut without tuherculation 

 or color pattern, heing of the same pale yellow as the rest of the hody. 

 The " rainure" extending from the right tentacle to the branchial 

 opening is a plain line barely perceptible; the branchial pit with two 

 minute lobes is short and in about the same relative position as in 

 P. lafonti. The body is much depressed and the margins thin, sharp 

 and even. The eyes appear as conspicuous small black spots in front 

 of the bases of the posterior tentacles. The general form is elongate 

 oval, the ends of the rhinophores, unlike the tentacles, are blunt, and 

 these organs are sulcate interiorly as usual. The length of the larg- 

 est specimen, as contracted in alcohol, is about 20 mm., and the 

 breadth about 9 mm. I propose for it the name of Phyllaplysia 

 tayJorl in honor of its discoverer. 



Of the three other species known, P. lafonti is pale green, with 

 darker bands and numerous violet spots ; P. depressa is green-buff, 

 variegated with black ; and P. Umacina is of a dusky green. All 

 of these are from western and southern Europe. 



A NEW SPECIES OF PLEUROBRANCHUS FROM CALIFORNIA. 



BY ff)t. H. DAI.L. 



Some time since Mrs. Oldroyd sent me two specimens of P/e>/ro- 

 branchus, from San Pedro, which I could not spare time to examine 

 microscopically at the moment. I can now specify their chief 

 diagnostic characters as follows : 

 Pleurobranchus callfornicus, n. sp. 



Animal when fresh of a waxen white, with a surface apparently 

 smooth, or rather like the skin of an orange, not tuberculate, but, 

 under a glass, showing obsolete distant pustules hardly raised above 

 the general surface; body elongate-oval, the foot longer than the 

 mantle behind. The gill short, its stem finely granular, not tuber- 

 culate, with ten or eleven alternate short vanes, the whole adnate 

 nearly to the tip, medially situated, with the contiguous genital 

 orifices just in front of its anterior insertion and the anus just over 

 the posterior insertion between the gill and the mantle. Eyes, 

 rhinophores, muzzle, jaws and teeth, as described by Pilsbry, for the 

 Gulf of California species collected by Fischer (Man. Conch., xvi, 

 pp. 201-2). Shell rather long and narrow, subrectangular, longi- 



