ELIOT: NTIDIBEANCnS OF FALKLAND ISLANDS. 351 



Name. Distribution. 



1. MoUdia scrotiua, Bergh {? = jE. papulosa)... An identical or closely allied species 



is recorded from tlie N. Atlantic, 

 the N. Pacifie, and Chile. 



2. Cratena Valcntini, n.^-^ Genus prohahly cosmopolitan: 



ahundant in N. Atlantic and 

 recorded from Chile. 



3. Galvina FaUdandica, n.sp Closely allied to G.flava from the 



N. Atlantic or identical. 



4. Corypliella Falklandlcn, n.sp. ... ... Closely allied to C. liiieata from 



N. Atlantic or identical. 



5. Tritonia Challfinff eriann , Bergh ... ... Off the coast of Chile. 



6. Diaulula vesfita {Ahrahixm) W. coast of Patagonia and Straits 



of Magellan, closely allied fonn 

 from California. 



7. Staurodoris Falklandica, n.sp | The genera are well represented in 



^. Acanthodoris Falklandica,M.s\) ( the N. Atlantic. 



The Falkland Islands are considerably farther south than New 

 Zealand (Stanley is about 50° S.), and it is therefore natural that there 

 should be no tropical element in the fauna. Two points are noticeable 

 in the short list given above. Firstly, all the genera but one (and that 

 a very doubtful identification) are characteristic of the I^orth Atlantic, 

 and three of the species are closely allied to and possibly identical 

 with British forms. Secondly, two of the species are recorded from 

 the coast of Chile, so that the east and west sides of the more 

 southern portion of South America must have, to some extent at least, 

 a common fauna. 



^OLiDiA SEROTINA, Bergh. 



Molidia scrotina, Bergh: Beitr. zur Kennt. der Aeolidiaden, i, p. 619, 



1874; id., '' yEoUdia (?var.) faafica, n.sp.?" Nudib. of North 



Pacific, part i, p. 127, 1879; part ii, p. 131; id., JEolidia papiUom 



{=. ^. serotwa), in Bull, of Mus. Conip. Zool. Harvard, p. 127, 



1894; id., .Molidia serotina, Zool. Jahrb. Supp. IV, Fauna 



Chilensis, Bd. i, p. 541, pi. xxxi, figs. 26-31. 



Three specimens, one marked Stanley Harbour. 



The largest is grey and 30-5 mm. long, but is evidently much bent 



and contracted. It measures 30 mm. across the pericardium. The 



foot is strongly grooved in front, but not produced into projecting 



angles. In the middle of the back there are 15 distinct rows of 



cerata, set upon well-marked ridges. In all there seem to be about 



40 rows, but they are much crowded near the rhinophores and tail. 



The bare space on the back is large and measures 12 X 5*5 mm. in the 



best preserved specimen, which is not the largest, and only 19 mm. 



long and 15 broad. The cerata are flat and not transparent. The 



anus is dextro-dorsal. The rhinophores are fairly long and stout in 



the best preserved specimens ; wrinkled, but not perfoliate. The oral 



tentacles are also stout, and set far apart on the sides of the head. 



The jaws are strong and bear no denticles. The radula consists of 

 a single row of 18 teeth of the usual pectinate shape; the largest is 

 about 1*5 broad. The basal strip is narrow from top to bottom, and 

 not strongly curved or arched. The smallest bear 24 denticles, the 



