60 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



where ascidians were obtained at depths of over 40 fathoms and the 

 species collected (10 in all) are as follows: 



D5153,* 49 fathoms : 



Ciallusia lonya, new species. 

 D5166, 97 fathoms: 



Pyura inflata, new species. 

 D5168, 80 fathoms: 



Rhopalopsis crassa (Herdman). 



Polycitor torosus Sluiter. 

 D5432, 51 fathoms: 



Ciallusia longa, new species. 

 D5518, 200 fathoms : 



Clavelina mulluccensis (Sluiter). 

 D5536, 279 fathoms : 



Molgula vitrea (Sluiter). 



Ctcnyura intermedia, new species. 



Pyura pallida (Sluiter). 



Pandocia quadrata (Herdman). 

 D5608, 1,089 fathoms: 



Molgula vitrea (Sluiter). 

 D5623. 272 fathoms: 



Culeolus herdmani Sluiter. 



Of these 10 species the only ones not also obtained at stations in 

 depths of less than 50 fathoms are : 



Molgula vitrea (Sluiter). 

 Ctenyura intermedia, new species. 

 Pyura inflata, new species. 

 Culeolus herdmani Sluiter. 

 Pandocia quadrata (Herdman). 



The geographical distribution of the ascidians in the different 

 parts of the Philippines must be very unequal if the results of this 

 expedition are conclusive. To what extent this may be due to the 

 circumstances, methods, and accidents of collecting, rather than to 

 uneven distribution of the animals, is difficult to say, but there can be 

 little doubt that both of these factors must be taken into account. 



Of all the stations where ascidians were collected only five lie to the 

 northward of the twelfth parallel of latitude, which crosses near the 

 middle of the Philippine group. The most favorable localities were 

 in the Sulu Archipelago, especially about Jolo Island, and among 

 the Tawi Tawi group. The stations in the vicinity of Jolo Light 

 yielded the greatest number of species, no less than 30 being obtained 

 within a small radius of the light. The most favorable stations were 

 as follows: 



D5145, 14 species. 

 D5174, 12 species. 

 D5139, D5144, D5149, 8 species each. 



» See list of stations pp. 61-67. 



