isn] Rittcr-Forsijth: Ascidians of Southern California 453 



Digestive system. — On left side of body. Esophagus (e., pi. 42, 

 fig. 40) emerges from dorsal posterior portion of branchial sae and 

 curves into stomach, which is over twice as long as wide, and has about 

 thirty-five longitudinal folds. Stomach lies along ventral and poste- 

 rior portion of the animal : from its pyloric end the intestine runs 

 anteriorly considerably past the middle of the body, then forms a 

 loop and runs posteriorly parallel to itself and the stomach and to the 

 left of the cardiac portion of the stomach, where it again forms a wide 

 loop and runs anteriorly along dorsal portion of the animal, becoming 

 somewhat convoluted just before reaching atrial orifice, where it ends 

 in an anus bordering by many rounded lobes (pi. 42, fig. 40). Endo- 

 carps very numerous on intestine as well as on mantle. 



Reproductive system. — Gonads probably nine in number on the 

 right side and three on left side; those on the right in two groups. 

 On the right side toward the dorsal surface are six parallel ovarian 

 cylinders (o., pi. 42, fig. 39). Of these the two middle ones are largest 

 and seem to be continuous with each other at their po.sterior ends, 

 although this may be due to crowding, as the glands were distended 

 with ripe eggs. The two pairs of outside ovarian cylinder-s are less 

 than half the diameter of the middle ones, all ending in tubular ovi- 

 ducts at their anterior ends somewhat below the atrial orifice. Just 

 posterior to and partly concealed by the most ventral of these ovaries 

 is a very small cylinder making the seventh of the group. Testicular 

 lobes are thickly attached to the inner surfaces of the cylinders and 

 their vasa efferentia join the vas deferens running along the center of 

 each cylinder to end in a free tubular portion similar to and just back 

 of the oviduct. The second group of two gonads of the right side is 

 anterior to the group just described and transverse in position. The 

 testicular lobes in this group extend considerably beyond the ovaries 

 (pi. 42, fig. 39). On the left side the longest ovarian cylinder lies in 

 the last loop in the intestine. The second longest one lies diagonally 

 from the top of the first intestinal loop toward the atrial orifice. 

 Between these two is a much shorter cylinder, ending in an oviduct 

 located considerably farther back than the other oviducts (pi. 42, 

 fig. 40). 



One large specimen of this species was taken in July. 1915, from 

 piles in San Diego Bay. Two small specimens were found in February 

 on the carapace of a crab. Bhod/a iMrvafrojis. taken at the end of the 

 wharf of the Scripps Institution. 



Stycla bariiliarti belongs to the comparatively small section of the 

 genus which have more than five gonads on a side. Its nearest of kin 

 seems to be «S'. elsa Hartmeyer of the Japanese waters. So far as the 

 gonads of the right side are concerned, harnharti and elsa appear to 

 be considerably alike, the resemblance pertaining not only to the 

 number but also to the disposition ; for, according to Hartmeyer, those 

 of this side form two groups. However, the anterior group in elsa 

 contains three instead of two as in baruharti. But the similarity 

 between the two species beyond this point is not close. In elsa the 



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