third natural 1 1 1 * - first with small, the second with rudimentary, the third without t< 



vrenience, such ;i classification may be used; but studying a few of the 



lij one s i discovers, that the affinities between the different species cannot 



: liy 1 1 1 « - shape or size or the greater or less development of parts of the capitulum 



how how complicated the relations are I need onl) refer to the new species /'. 



iund by the "Siboga" and to be described later. With its miniature terga it seems 



naturally t<> bridge over the gap between /'. crassum with small and /'. eburneum without 



■ ; ili-- arrangement of the spines on the cirri in /'. obliquum is < | uit < - different from 



it is in /'. eburneum and shows that it is perfectly impossible t<> consider them as nearly 



related. In tliis regard /'. obliquum seems to be nearly allied to /'. fissum\ in the presence, 



however, "l a distinct line running from the umbo to the upper end ut" the scutum /'. eburneum 



approaches to /'. fissum much more than /'. obliquum does. 



I he geographical distribution of the species of Poecilasma is only imperfectly known as 

 yet. lwo species have been observed in the Atlantic and also in the Pacific; a very large 

 proportion ol the known species inhabit the Malay Archipelago, as may be seen from the 

 following list : 



•& 



ilasma Kaempferi Darwin (with /'. aurantium Darwin), Japan, Madeira. 350 a 400 m. 



Gruvel), Gulf of Manaar, 775 m. (Annandale). 

 cilasma dubium n. sp., Malay Archipelago, 204 to 304 m. 



ilasma carinatum Hoek, West Indies, Atlantic. Malay Archipelago, 600 to [633 m. 



ilasma gracile Hoek, Australia, Malay Archipelago, 521 — 750111. 



ilasma fissum 1 >arwin (with P. amygdalum Auriv. and P. lenticula Auriv. 1, Malay Archipelago, 

 Philippines, Australia \Vni\iu\ Andamans (AnnanüALI i. Low water. 



ilasma excavatum 11. sp., Malay Archipelago. 289 — 304 m. 

 Poecilasma minutum Gruvel ? 

 Poecilasma tridens Auriv., Philippines. Depth ? 

 Poecilasma vagans Auriv.. probably Mast India. Pelagic? 



Poecilasma crassum J. E. Gray, Madeira (Darwin), Azores (Gruvel). Depth - 

 Poecilasma unguiculus Auriv., Azores, 880 m. 

 Poecilasma obliquum 11. sp., Malay Archipelago, 204 — 304 m. 

 Poecilasma eburneum Hinds, Malay Archipelago, ? Red Sea (Wli.tnek . p> 00 m. 



Poecilasma Kaempferi (with /'. aurantium) and /'. carinatum are so far as at present 



known the only species inhabiting both the Atlantic and the Indian ( )cean. Ciu'vii. ' says that 



rassum [from Madeira (Darwin and the Azores occurs also in the I'hilippine Archipelago, 



Island of Bohol, but I suspect that this is an error; I do not know at any rate, on whose 



thoritv this is stated. 



ripcdien ciner Kci^e oach dem irbücher. Alil. fur Systetnalik. XII, iSgg. 



n.. Malaysian Baroacles in the Indian Museum. Memoirs "f the Asiatic Bengal. L 5. 1905. 



bisher beschrii ripedienarten. Archiv f. Naturgeschichte, 1S97, Bd I. II. ;. 



Monographie des Cirrhipèd Pm,, p. 11". 



