'208 ACTINOMIiTRA AI.TERXANS. 



The smaller oue lias stiff pinnules which are not well 

 clothed with perisome, while in the other which is but 

 little larger the pinnules of the lower and middle parts of 

 the arm are stout and fleshy , very much as in one of the 

 Ubay varieties of the Philippine series. 



The mouth too does not occupy its usual interradial pos- 

 ition , and the anus is not quite in the centre of the disc. 

 The arms of both individuals though all grooved , are di- 

 morphic , the posterior ones being shorter and tapering more 

 rapidly. 



The Museum contains yet another example of this species. 

 It is a small and immature specimen collected by Hoedt 

 on the south coast of Ceram. The distichal and second 

 brachial pinnules are relatively rather large , the latter being 

 considerably longer than its successor on the third brach- 

 ial which may be the smallest pinnule on the arm. The 

 overlap of the arm-joints is also but slightly marked. 



To this species I would also refer a small 20-arraed spec- 

 imen brought to the Berlin Museum by Prof, von Martens 

 from Kupang, Timor. It is peculiar for the small size of 

 the pinnule on the fourth brachial which is less than half 

 the length of that on the second brachial. 



17. JM-Ctinontetm ultemttns ^ n. sp. 



Description of an individual. 



Centrodorsal a pentagonal disc slightly hollowed in the 

 centre, with its angles produced into five blunt processes 

 which are separated from the radials by the outer ends of 

 the basal rays. No cirrhi nor any distinct traces of funct- 

 ional cirrhus-sockets. First radials short , below the level 

 of the centrodorsal but not separated from it by distinct 

 clefts; the second much longer and wider, broadly hexa- 

 gonal , and partly united laterally ; axillaries barely half as 

 long again , almost triangular with very open angles. Num- 

 erous arms of 150 -j- joints. 



Noti'S from the Ijeytleii IVrusoiiin , Vol. III. 



