42 



the genera Hoplophorus, Sysiellaspis and Acatithephyra: besides a new variety of AcatitJt. 

 media Bate, a new species of this urenus was discovered, presenting- the same soft and mem- 

 branaceous integument as Acanth. brevirostris S. I. Smith etc. and which therefore must be 

 included in the now proposed section or subgenus Meningodora. Very interesting is also the 

 only specimen of Systellaspis debilis (A. M.-Edw.), taken in the Halmaheira Sea, that proved 

 to differ rather distinctly from the typical atlantic species and therefore has also been described 

 as a new variety. As far as we know at present, the Indian Archipelago, including the Philippine 

 Islands, is inhabited by one species of Hoplophorus, by one of Sysiellaspis, by ten species and 

 two varieties of Acatithephyra, by three species of Notostomus and by one of Hymaiodora, 

 while species of Ephyritia and Gonatonohts have not yet been observed in these seas. 



LIST OF ALL THE SPECIES OF HOPLOPHORIDAE, KNOWN AT PRESENT. 



I. Genus Hoplophorus H. M.-Kdw. 1837. 



SPECIES 



HABITAT 



DEPTH 



IN FATIIilMS 



REMARKS 



foliaceus Ratlib. 1906 



gracilirostris A. M.-Edw. 

 1881 



Grimaldii Cout. 1905 



lonzirostris Bate 1888. 



spinicauda A. M.-Edw. 1883 

 typus H. M.-l-:d\v. 1837 . . 



This species is perhaps 

 identical with Hopl. 

 spinicauda A. M.-Edw. 



Perhaps identical with 

 Hopl. gracilirostris A. 

 M.-Edw. 



With this species Hopl. 

 brevirostris Bate 1888 

 from off Tablas Islanil 

 is certainly identical. 



