54 



Ecuador, did not fully agree with the typical species from the east side, as Eaxon has pointed 

 out. Acanth. pulchra A. M.-Edw. occurs in the Mediterranean, but was not yet observed 

 outside of it. 



Acanth. (Meningodora) mollis (S. I. Smith), Acanth. Batei Faxon, Acanth. Braueri 

 Balss and Acanth. Kingsleyi Bate are four species, which hitherto have only been observed in 

 the Atlantic: the first is found off the east coast of the United States, off the coast of Portugal 

 and off Pernambuco, while the three others occur in the Gulf of Guinea, though Acanth. Batei 

 has also been taken south of Iceland. The variety acantliitelsonis Bate of Acanth. purpurea 

 A. M.-Edw. is also only known from the tropical part of the Atlantic. Two species, Acanth. 

 carinata Bate and Acanth. approxima Bate occur in Sarmiento Channel on the west coast of 

 Patagonia: the former has not yet been found elsewhere, but Acanth. approxima occurs perhaps 

 also in the Gulf of Panama. The third of the three species which are found on the west coast 

 of America, but not elsewhere, is Acanth. cucullata Faxon from the Gulf of Panama. 



Eight species and 2 varieties are at present known to occur in the Indopacific, though 

 not elsewhere. Acanth. acutifrons Bate has only been taken off the Aru Islands and Acanth. 

 media Bate only near one of the Philippine Islands, but a remarkable variety obliquirostris of 

 the last named form was discovered by the "Siboga" in the Halmaheira Sea. An interesting new 

 species, Acanth. (Meningodora) Sibogae, has also been captured by this expedition in the entrance 

 of the Gulf of Boni, it belongs to that small section of the genus in which the integument is 

 soft and membranaceous and for which, p. 41, the name of Meningodora was proposed. Acanth. 

 tenuipes (Bate) has only been recorded from the east coast of Cape York Peninsula. The Indian 

 Ocean, north of the Equator, is inhabited by Acanth. sanguinea W.-Mas., Acanth. Kcmpii 

 Balss and by the variety Jimbriata W.-Mas. of Acanth. armata A. M.-Edw., while the typical 

 species occurs both in the Indian Archipelago and off the east coast of the United States; 

 Acanth. Valdiviae Balss is only known from the southern Indian Ocean, Acanth. (Meningodora) 

 rostrata (Bate), finally, has been recorded not only from the north Pacific and the Philippine 

 Islands, but also from Torres Strait. 



From the List of localities at p. 43 — 46 we may conclude that 110 less than 10 species 

 with 2 varieties are at present known to inhabit the Indian Archipelago, 4 species and 1 variety 

 of which have not yet been observed elsewhere, so that just half the number of all 

 the known species of Acanthcphyra prove to occur in this Archipelago. Four 

 species and varieties of two other ones were obtained by the Siboga expedition, of which Acanth. 

 curtirostris W.-Mas. was not yet known to occur in the Indian Archipelago, while Acanth. 

 Sibogae and a variety of Acanth. media Bate proved to be new to science. 



Concerning the vertical range it may be allowed to refer to the List at page 43 — 46, 

 from which it results that the depths at which the species of Acanthcphyra occur, vary rather 

 considerably. While some, like Acanth. ar'maia A. M.-Edw. and its variety Jimbriata W.-Mas., 

 Acanth. acutifrons Bate etc, were dredged in less than 1000 fathoms, other species as e. g. 

 Acanth. brevirostris S. I. Smith, cucullata Faxon and microphthalma S. I. Smith were taken 

 in considerably deeper water. The depth at which some species occur, varies also rather much. 

 So e. g. Acanth. purpurea A. M.-Edw., an almost cosmopolitan species, which was trawled off 



