ASCIDIANS OF THE PHILIPPINES — VAN NAME. 



Ill 



sacs, each containing a few eggs which are apparently discharged 

 by an orifice on a neck too short to be termed an oviduct. Testes 

 more numerous (15 to 20) than the ovaries; they are rather large 

 and are generally cleft into several lobes, sometimes of quite irregular 

 outline. They are mostly arranged in a row on the left ventral 

 region; just anterior to the intestinal loop this row bends dorsally 

 and forward for a little distance. A few of the testes are situated 

 on the right side along the endostyle, continuing forward the row 

 of female gonads. In a few cases hermaphroditic gonads, each con- 

 taining a testis and a small group of eggs, were found replacing one 

 or two of the female gonads. 



The type and only specimen (No. 135) (Cat. No. G034 U.S.N.M.) 

 is from station D5145, off Jolo Light, 23 fathoms, coral sand and 

 shells, February 14, 1908. 



This species is closely allied to S. socialis Hartmeyer, 1903 (see 

 also Michaelsen, 1904), of the northwestern European coasts. In 



my 



64 ^=^= 65 



Pigs. 64-66. — Stolonica vesicularis, new species. 64, Left and right sides op bod* 

 op zooid. X 6. 65, Dorsal tubercle, x 20. 66, Gonads." X 20. 



that species, however, gonads with ovaries only do not occur, and the 

 posterior part of the row of gonads on the right side is composed 

 entirely of hermaphroditic gonads. Other minor differences also, 

 as well as the geographical separation and different climatic condi- 

 tions of the localities of the two forms make it appear necessary to 

 regard this as a new species. 



Family BOTRYLLIDAE Verrill, 1871. 

 Genus BOTRYLLOIDES Milne-Edwards, 1841. 



BOTRYLLOIDES TYREUM Herdman, 1886. 



188G. Botrylloides pvrpureum Herdman (not v. Drasche, 18S3), Rep. Voy. 



Challenger, vol. 14, Tunicata, p. 41. Name changed in same work 



(pp. 344 ami 3S1) to B. tyreum; pi. 1, figs. 1-3; pi. 2, figs. 1-11. 



Not Sarcobotrylloides purpureum Herdman, 1891 (see Herdman, 



1SS9, p. 104). 

 1891. Botrylloides tyreum Heudman. Jonrn. Linn. Soc. London. Zool., vol. 



23, p. 608. 



1S98. Botrylloides tyreum Gottsciialdt. Abhandl. Senckenb. Gesell., vol. 



24. p. 642. 



1904. Botrylloides tyreum Sluiter, Siboga-Exped., vol. 56a, p. 101. 

 1909. Botrylloides tyreum Haktmeyek, Bronn's Tier-reich. vol. 3, suppl., p. 

 1380. 



