368 NOTKS ON ttOMK HKITLSII NUDIBUANCHS. 



ill his jiaper Antefkenitu/ over twee voor dc ncdcrlandsche Faxma nieuwe 

 NtuUhrancJdnta, published in the Tijdschrift der Nedeiiandsche Dier- 

 kuiidifjr. Verccni(jing, 1893, p. 35, has already called the animal Ampho- 

 rina nurantiaca. 



AMPIIUKIXA OLIVACEA (A. ."k \\.). 



(Alder and Hancock, Man. Brit. Nad., Fam. 3, pi. 26. 



]>EAUMONT, I.e., p. 834.) 



One living specimen was seen at Plymouth in April, 1905, which 

 I eiiould have hesitated to identify with Alder and Hancock's E. olivacca 

 on account of the differences in tint and markings ; but Mr. Beaumont 

 considered it referable to this species, and stated that the coloration is 

 very varying. As the other characters of the animal proved to agree 

 with E. olivacca, I have no doubt he is correct. 



The animal is only 4 ram. long, stoutly built, with a short tail. The 

 body colour is whitish ; the tentacle, the rhinophores, and the region 

 behind them are yellowish. There are no red markings, but the cerata 

 and body, especially the head, are sprinkled with conspicuous dots of 

 bright, opaque yellow. The tips of the cerata are whitish and the 

 hepatric diverticula are olive-coloured. 



The front of the foot is slightly expanded into round lobes, but there 

 are no tentacular angles. The cerata are rather thick ; the l)ranches of 

 the liver within them are of loose and irregular shape. The cerata are 

 set in eight rows, fairly close together, containing three to four each. 



The jaws bear a row of minute but distinct blunt denticals. The 

 radula tapers somewhat, but not conspicuously ; it consists of a single 

 series of fifty-three teeth, with six denticles on each side of the median 

 cusp (Fig. 18.). This cusp is elevated and rises further back than the 

 others. I found the verge armed with a hooked style (Fig. 19.) as 

 already described by Mr. Beaumont. 



I think that this species, like Eolis aurantiaca, A. & H., must be 

 referred to Amphorina, for it has thick papilhe, a spine on the penis, 

 and a long somewhat tapering radula, in which the teeth iiave the 

 central cusp rising far back. 



CRATENA AMCENA (A. & H.). 



(Alder and Hancock, Mo7i. Brit. Nudib., Fam. 3, pi. 3. 



Beaumont, I.e., p. 834.) 



One living specimen, Plymouth, April, 1905. The animal when fully 

 extended is about 7 5 mm. long. The body is of a not very clear white, 

 with opaque white spots, especially on the head and tail. The angles of 

 the foot are rounded in front. The tentacles and rhinophores are as in 



