SOLEXOGASTRES. 1 1 



y. "With abdominal, without cloacal spicnles. Salivary glands tube-shaped. 

 Index G-25. 



Prottcni/ienia gorgonophila Kow. a. Mar. (5, p. 75.) 



Mediterranean. 



I'lininiiiifiiin ili'niili'nilii Kow. a. Mar. (5, p. 59.) 

 Mediterranean. 



B. Radula biserial. Salivary glands tube-shaped and opening out separately. With 



abdominal spicules. Receptacula seminis numerous. One dorso-tenninal sense-organ. 

 Index 18. 



Epimenia Nierstrasz. 



Epimenia australis (Thiele) (17, p. 25.V) 

 N.W. coast (if Australia. i!n fathoms. 



C. Radula bi-pectinid. Salivary glands consisting of more or loss developed accumu- 



lations of glandular cells, opening out through salivary duels, which remain separated. 

 Abdominal spicules present. Receptacula seminis numerous. The coelomodncta remain 

 separated. Index 24. 



Anamenia Nierstrasz. 



Anamrnia t/iuboinensix (Thiele) (15.) 

 Ambon. 



D. Radula bi-pcctinid (?). Salivary glands lobed, consisting of accumulations of 



glandular cells, and opening out through salivary ducts, which remain separated. 

 Without abdominal and cloacal spicules. Index 20. 



Amphimenia Thiele. 



Amji/tiiiifiiiii- iicii/mli/d/ift Thiele (13, p. 244.) 

 Naples. 



The same holds good for Rhopalomenia. Up to now, of this genus five species 

 arc known, rh., aglaopheniae Kow. a. Mar. ; mv'/// Tliiele ; indicn Nierstr. ; deliUs 

 Nierstr. ; and scandem Heath. All these forms resemble the Proneomeuiidac ; they 

 differ, however, in the absence of a radula. Traces of the latter are found in 

 the radula-sac. The structure of the salivary glands presents important poinls of 

 difference. R. aglaopheniae has two pairs of salivary glands, one pair vesicular and 

 the other lobate, just as they occur in Anipliimcnia. Undoubtedly, I'. </>/<// is related 

 tn aglaopheniae. Jf. ///<//<</ shows numerous receptacula seminis; cloacal spicules, 

 however, fail. True abdominal spicules are absent, though around the cloacal opening 

 spicules occur of special form. Moreover, there only occur two tube-shaped salivary 

 glands; relation with Proneomenia tlmli'iisix and E/iinn'nin <inxtr<ilix should, therefore, 

 not be excluded. Rhopalomenia <l<l>ilix, thoroughly known to us, probably is closely 

 related to ff/injiitfuiiii'iiiit im/icit. ( >nr knowledge of the stnu'ture of the internal 

 organs of Rhopalomenia w<t/nli'/ix, with the exception of the nervous system, is 

 insufficient. It appears to me that these forms arc connected with different genera 

 of the Proneomeniidae, and, therefore, the genus Rhopalomenia may be a hetero- 

 geneous one. A division into smaller genera is for the present not to be 



mended ; in still stronger degree the same 



holds good fur Chaetoderma (7, p. 368). 



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