's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 69 



by Grube from the Philippines ! ) and afterwards found by "Willey near 

 Ceylon 2 ), by Potts near the Amirante-isles (Seychelles) 3 ) and by both 

 English authors considered as a southern form of Herm hystrix. After- 

 wards Grube mentioned Herm. bicolor 4 ) from the Red Sea, also closely 

 allied to Herm. hystrix, but distinguished by the gray-blue colour of the 

 place of attachment of the scales and by the first pair of its elytra being 

 provided with short papillae. Herm. erinaceus 5 ) from the Red Sea and 

 Herm. Mathei 5 ) from Isle de France according to Quatrefages should be 

 characterised by the presence of only 1 3 pairs of elytra, as for the first-named 

 species was confirmed by Frickhinger G ). Haswell described three species 

 from Australy, viz. Herm. Macleari, -brachyceras and -dolichoceras 7 ); of 

 these Herm. Macleari presumably belongs to the genus Pontogenia on 

 account of the appearance of the dorsal bristles. Herm. brachyceras should 

 be characterised by a very short tentacle, but it appears somewhat dubious 

 to me, wether it has not lost its distal part, as was also the case with 

 Herm. dolichoceras, the ventral setae of which possess "two smaller acces- 

 sory teeth and a fringe of hairs" (that however is not figured). The last 

 species probably ought to be ranged in the genus Laetmonice, for, though 

 the genera Hermione and Laetmonice are closely allied to each other and 

 Claparède 8 ) therefore proposed to unite them, I think it better to reserve 

 the name of Hermione for those species, that have only toothed ventral 

 bristles, without a fringe of hairs. Grube believed that the Oriental form 

 Herm. malleata should be distinguished from the European Herm. hystrix 

 besides by its smaller dimensions and the shorter tentacle especially by 

 „a hammer-shaped appendage at the dorsal side of the cirriphore segments"; 

 Willey however stated that the malleiform processes, described by Grube, 

 are „clearly not definite morphological structures, but merely dermal folds 

 associated with the elytrophores and branchial tubercles". At the same 

 time he pointed out that in Herm. malleata the elytrophore-segments 

 besides the backwardly directed fascicle of long brown glochideal setae 

 carry on each side a flabellum of curved smooth-tipped setae radi- 

 ating dorsad, whereas in Herm. hystrix these bristles are minutely 

 nodular and provided with a swelling below the tip, as 

 already exactly figured by Claparède (Annel. chétopod. de Naples, PL I, 



1) Annulata Semperiaua, p. 17, PI. I, fig. 5. 



2) Loc. cit. p. 245, PL I. figs. 3 and 4. 



3) Loc. cit. p. 329. 



4) Bemerk, iiber die Fam. d. Aphroditëeii Sitzber. Schles. Gesellsch. 1874, p. 11, 



5) Hist. nat. d. Annelés, p. 208 and 210. 



6) Jap. Polychâten a. d. Sammlung Doflein, Zool. Anz. Bd. XLVI, 1916, p. 233, and by letters. 



7) Proc. Linn. Soc. Vol. 7, p. 272, PI. VII. 



8) Annél. Chétop. du Golfe de Naples, p. 357. 



