52 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Didemnum makropnous, new species. 



Didemnum ramosum, new species. 



Leptoclinum califlciforme, new species. 



Diplosomoides molle Herdman, 1886. 



Polyclinum mikropnous, new species. 



Atnaroucium craterifcrum, new species. 



Atopogaster tropicum, new species. 



Morchellium intercedens, new species (Synoicum intercede/is), 



Michaelsen (1904, p. 48) discusses again Herdman's (1886) Syn- 

 styela incrustans and shows that the Philippine specimen which 

 Herdman included under that name is different from the others. 

 He gives it the new name Diandrocarpa monocarpa, var. philippi- 

 nensis. 



Caullery (1909, p. 46), evidently through an oversight, implies 

 that Nephtheis [Oxycorynia'] fascicularis (v. Drasche) was from the 

 Philippines. It was from the Caroline Islands, and is not known 

 from the Philippines, unless Nephtheis thompsoni (Herdman), 1886. 

 should prove identical with von Drasche's species. 



Hartmeyer (1909) in Bronn's Tier-reich has compiled a list of all 

 the known species of ascidians with brief indications of their dis- 

 tribution in the various regions. He states (p. 1439) that he has 

 received specimens of Nephtheis from Gould's type-locality (the Sulu 

 Sea). 



COLLECTION OF THE PHILIPPINE EXPEDITION, 1907-1910. 



The ascidians collected by the Albatross Expedition and turned 

 over to the writer for study comprise 163 lots of specimens, repre- 

 senting 46 species and, according to the classification here adopted, 29 

 genera and 12 families. Owing to the large number of species pre- 

 viously described from the Malay region, there could be little doubt 

 that most of the forms had already been described, and the writer has 

 been able to refer all but eight of them to species already known, 

 although in identifying some of the less clearly characterized forms 

 without an actual comparison of specimens an element of doubt could 

 not be eliminated. Of the eight species which it has seemed neces- 

 sary to treat as new to science, two are so distinct from any thus far 

 described as to require the formation of a new genus for each. The 

 others present no striking peculiarities. 



The writer has also examined a few other specimens of Ascidians 

 from the Philippines contained in the collections of the United 

 States National Museum. No additional species were found among 

 them, but their localities have been recorded in this paper. 



The following are the species collected by the Albatross Expe- 

 dition : 



Family Molgulidae Lacaze-Dulhiers, 1877. 



1. Molgula vitrca Stutter, 1904. 



