582 GASTROPODA. \0pisthobraxrhia.- 



renal pore. Back rounded towards the low sides of the body ; genital 

 opeiiiiKj on the right side. Anterior margin of foot arched, strongly 

 grooved ; edge of the foot not narrow : tail short. Colour whitish ; 

 papillse grey, tips white. 



Length. 2'8 cm. : breadth, T8 cm. ; height without papillse, - 7 cm. 



Jaws high and narrow, cutting-edge smooth, finely striated. 

 Radula with about 20 rows of teeth, which are arched, with a strong 

 median and 23-35 smaller sharp denticles on either side. 



Details on the other internal organs are to be found in Dr. Bergh's 

 publication. 



Hah. French Pass, one specimen (Professor Schauinsland). 



2. ^olidiella faustina, Bergh, 1900. 



^Eolididla faustina, Bergh., Zool. Jahrb., Syst., xiii, 3, 1900, 235, pi. 20, 

 f. 39, 40. 



Form of animal as usual in the genus. Papillce covering nearly 

 the whole of the dorsal surface ; anteriorly their arrangement pro- 

 duces 2 horseshoe-shaped figures ; behind these 4 there are about 

 10 somewhat oblique rows, each row containing about 6-8 papillae ; 

 they are cylindro-conic and close together. Anal papilla behind the 

 sixth row. Colour dirty light-yellowish. 



Length. 15 mm. ; breadth, 3-5 mm. 



Cutting-edge of jaws finely striated. Radula with 25 rows of 

 teeth, which are semicircular, notched at the middle of the posterior 

 margin, with a short stout median denticle, and about 35 long slender 

 denticles on each side. 



The other internal organs resembling those of the foregoing species. 



Hob. French Pass, one specimen (Professor Schauinsland). 



Genus 3. FACELINA, Alder and Hancock, 1855. 



Facelina, A. & H., Monogr. Brit. Nudibr. Moll., 1855. Type : Eolida 

 coronata, Forbes. Acanthopsole, Trinchese, 1874. 



Body rather slender. Rhinophores perfoliated ; oral tentacles 

 long. Dorsal papillae linear or fusiform, clustered. Foot narrow, 

 with the anterior angles acute and much produced. Radula uni- 

 serial. the posterior margin of teeth pectinated. 



1. Facelina sp. 



Facelina sp., Eliot, P. Mai. S., vii, 1907, 331. 



Animal long and narrow, with a tapering tail and curved ten- 

 tacular projections on the anterior margin of the foot. Colour uniform 

 dull olive, as preserved. Oral tentacles very large and stout. Rhino- 

 phores stout, deeply ringed. Cerata sparse and small ; many have 

 been lost, but they seem to have been set in four groups. Radula : 

 A single series of 18 teeth of the usual horseshoe shape, with a long 

 prominent central cusp and 4 very distinct denticles on either side 

 of it. Jaws decayed, but apparently bearing a single row of irregular 



