546 H. p. KJERSCHOW AGERSBORG 



is not so completely broken up as in M . 1 e o n i n a . Again 

 (18906: 283) he calls attention to the fact that the liver of 

 M. ocellata opens into the stomach behind the stomach- 

 plates, and in that way it is seen to differ from M . 1 e o n i n a , 

 But the distribution of the hepatic branches is similar : ' Dicht 

 hinter dem Glirtel der Magenplatten miinden die dicken 

 Leberstamme oin, rechts der besonders dicke aus der ersten 

 rechten Papille. links der aus der entsprechenden linken, und 

 dicht neben demselben der grosse Hauptleberstamm, langs 

 der Riickenseite der Zwitterdrlise und iiber dieselbe hinaus 

 verlaufend.' Finally, describing the species M. rosea Rang, 

 he shows (1908: 98) that it is quite similar to Chioraera 

 Gould, when he writes : ' The three principal liver-branches 

 with their ramified hepatic ducts and the principal branchlets 

 to the dorsal epinotidia as usual. . . . Network of liver-branches 

 is interwoven with the much branched renal tubes (figs. 9, 10) 

 the branches reaching the root of the epinotidia, but did not 

 seem to ascend into them.' 



Pease (1860: 34) refers to the liver in M. pilosa, only 

 by stating : ' . . . body punctured with brown, which are most 

 conspicuous along the flank,' And Alder and Hancock (1845: 

 13), writing on this subject, say in part : ' In the greater 

 number of Eolididae (Aeolidiidae), however, the liver 

 has entirely disappeared from the abdomen and is broken up 

 into numerous minute portions or glands which are thrust 

 into the branchial papillae. The delicate ducts from these 

 glands pass onward and unite to form great hepatic ducts or 

 trunk channels, which open into the stomach.' Hertwig 

 (1912: 335) concurs in this by saying: 'In Aeolidae 

 (Aeolidiidae) branches of the digestive tract enter the 

 cerata, expand distally to small sacs filled with nettle-cells 

 used for defence ; they are derived from hydroids on which 

 these animals feed.' So also Lang (1900: 300) writes : ' Bei 

 zahlreichen Nudibranchiern lost sich die Verdauungsdriise in 

 sich veriistelnde Darmdivertikel auf, die sich fast nach Art 

 der Gastrokanale oder Darmaste der Tubellarien in Korper 

 ausbreiten und bis in die Eiickenanhange des Korpers empor- 

 steigen (cladohepatische Nudibranchier), wo sie mit den 



