NO. 1989. A8CIDIAN8 FROM N0RTHEA8TERN PACIFIC— RITTER. 429 



SPECIES IN THE COLLECTION ARRANGED BY FAMILIES. 

 MoLGULiD/E. Styelid^ — Continued. 



1. Molgula oregonia, new species. 



2. Molgula retortiformis. 



3. Molgula crystallina. 



4. Molgula siphonalis. 



5. Eugyrioides dalli, new species. 



6. Eugyrioides rara. 



7. Rhizoviolgula ritteri. 



HaLOC YNTHnO^ . 



8. Halocynthia ivashingtonia, new 



species. 



9. Halocynthia haustor. 



10. Halocynthia haustor foliacea, new 



subspecies. 



11. Halocynthia aurantium. 



12. Halocynthia echinata. 



13. Halocynthia villosa. 



14. Halocynthia castoneiformis. 



15. Halocynthia okai. 



16. Halocynthia johnsoni. 



17. Boltenia ovifera. 

 Hartmeyeria, new genus. 



18. Hartmeyeria triangularis, new 



species. 



19. Culeolus sluiteri, new species. 



Styelid^. 



20. Styela macrenteron, new species. 



21. Styela hemicsespitosa, new species. 



22. Styela sabuli/era, new species. 



23. Styela loveni. 



24. Styela gibbsii. 



25. Styela yahutatensis. 

 Styela, species. 



26. Styelopsis grossularia. 



27. Dendrodoa tuberculata. 



28. Dendrodoa subpedunculala. 



29. Dendrodoa adolpki. 



30. Pelonaia corrugata. 



RnODOSOMIDiE. 



31. Chelyosoma columbianum. 



32. Chelyosoma productum. 



33. Corella willmeriana. 



34. Corella japonica. 

 Corella, species. 



35. Corellopsis pedunculata. 



36. Corynascidia herdmani, new species. 



37. Agnesia beringia, new species. 



Phallusiida'. 



38. Phallusia vermiformis, new species. 



39. Phallusia unalashensis, new species. 



40. Phallusia adhserens. 



ClONID^. 



41. Ciona intestinalis. 



DISTRIBUTION. 



It would be possible to treat the data under this head in con- 

 siderably more detail, but I have done as much as seems profitable 

 for the amount and character of the collection. 



The collections so far made in the northeastern Pacific are sufficient 

 to give a general picture only of the ascidian life of the regions, and a 

 manipulation of the data in great detail would jiroduce results in 

 large measure not only unreliable, but deceptive, for they would 

 have the appearance of a significance which in reality they would 

 not possess. 



HORIZONTAL DISTRIBUTION. 



The 41 species and subspecies recognized m the report fall into 

 three of the five latitude zones into which Hartmeyer has divided 

 the seas of the earth, namely, Arctic, Subarctic, and Tropic. 

 Since, however, nearly all the collecting to which the report pertams 



