358 NOTES ON SOME BRITISH NUDIRKANCHS. 



If this specimen is really Alder iiiid Hancock's Eolis angulata, I do 

 uot think that species can be separated from j^olididla t/lauca. As 

 shown in Alder and Ilancuck's plates the coloration and general appear- 

 ance are much the same, and it is noticeable that in both tlie rhinophores 

 are represented as showing indications of slight annulation. Since 

 A'o/?s augulatn was four lines long and yEolidieUa glauca nearly two 

 inches, difterences in shape and the numl)er of cerata cannot l)e 

 regarded as safe specific characteristics. 



The anatomy of yEolididla (jhtiwa is described by Bergh in his 

 Beitr. zur K<nntn. dcr JEolidiaden, viii., 1885, pp. 24-8. The known 

 distribution of the species extends from Scandinavia to the Mediter- 

 ranean. 



CORYPHELLA. 



This genus consists of /Eolids, with a triseriate radula, somewhat 

 elongate bodies, and unperfoliated rhinophores. It is noticeable, how- 

 ever, that in several species the rhinophores show traces of rings 

 or wrinkles, or bear minute lumps. The details submitted below seem 

 to show that G. gracilis and C. smaragdina are varieties of one species. 

 C. heaumonti, now first described, offers many peculiarities, and almost 

 merits generic rank. 



liergh in his System der Niidihranchiaten Gasteropoden recognizes 

 twenty-three species, of which several must be regarded as doulttful 

 (e.g. G. alderi, G. 2)n'>'vnla, C. semidecora, G. forelisi, G. occllata), since 

 the radula is unknown. To this list may be added : — 



C. cooperi, Cockerell {Jour, of Mai, 1901, viii. 3, p. 85). 



G. calif ornica, Bergh {Mai. Unt. in Semper' s Reiscn, vi. 1, 1904, p. 6). 



G. sarsi, Friele {Bergen's Museums Aarhog, 1902, No. 3, p. 12). 



Cockerell (/. of Malac., 1901, p. 121) considers Cooper's u:Eolis iodinea 

 to be a Gorijijhella, but Bergh refers it to Flahcllina. Verrill's Gorg- 

 phclla {?) pallida is somewhat doubtful. 



CORYniELLA RUFI BRANCH I ALLS (.JOHN ST.). 

 (Alder and Hancock, Monog. of Brifish Nudih., Fam. 3, pi. 14.) 



One living specimen, Plymouth, April, 1905. The animal is very 

 elongate, 15 mm. long and only 3 mm. broad. The foot is produced in 

 front into fairly long tentacular angles, which are very distinctly 

 grooved. The oral tentacles are 5 mm. or more long, and are carried 

 in a curved position. The rhinophores are 7 mm. long, straiglit, and 

 covered with rows of little lumps set in fairly regular rings. 

 There are about twenty-five rings, and about eiglit lumps in each. 



