191"] Kittei-Forsyth: Ascidians of Southern California 445 



Intestine a simple loop; stomach smooth-walled. 



Sexual organs: gonads on right-posterior side of intestinal loop; ovary simple, 

 eggs very large, few in number; testis not many-lobed, vas deferens not coiled. 



Budding intestinal. 



Genus 17. Diplosomoides 



Similar to Diplosoma but calcarious spicules in the cellulose mass; a langiiet 

 over the atrial orifice. 



Genus 18. Glossophorum 



Colony massive, sub globular or lobed, sometimes pedunculate; zooids mostly 

 in distinct systems. 



Form of zooid much elongated; body divided into three sections: thorax, 

 abdomen, and postabdomen ; branchial orifice 6-lobed, atrial with a languet. 



Branchial sac well-developed, as many as twenty rows of stigmata; papillae 

 on the inner surface of the branchial membrane along the interserial vessels. 



Intestine a close, twisted loop situated close behind the thorax; stomach 

 smooth-walled. 



Gonads, ovary and testis commingled, making a rather compact mass, situated 

 in the stalked postabdomen. 



Budding stolonic. 



Genus 19. Macroclinum 



Colony massive or divided into club-shaped pieces; sometimes coated with 

 sand. 



Form of zooid elongated, divided into thorax, abdomen, and postabdomen, 

 the last not constricted from the abdomen and variable in size and make-up; 

 branchial orifice 6-Iobed, atrial with a well-developed languet. 



Branchial sac: many rows of stigmata, twenty in some species. 



Intestine: loop not twisted, stomach wall not folded but inner surface un- 

 even in some species. 



Gonads close behind the intestinal loop; ovary simple, surrounded by the 

 numerous masses of the testis. 



Budding stolonic. 



Genus 20. Amarouclum 



Colony variable, thin and encrusting, massive or divided into pedunculated 

 sections. 



Form of zooid elongated, divided into thorax, abdomen, and postabdomen, 

 the latter often long and cylindrical; branchial orifice 6-lobed, atrial with a 

 languet. 



Branchial sac: rows of .stigmata, mostly less than twenty. 



Intestine: loop simple, stomach wall folded. 



Gonads in the postabdomen, usually somewhat removed from the intestinal 

 loop; ovary simple, testis many-lobed, scattered along the postabdomen. 

 Genus 21. Euherdmama 



Colony consisting of large, elongated zooids, wholly separated from one 

 another except for the basal stolonic attachments, making tlie condition com- 

 monly known as social ; color opaque white, or transparent. 



Form of zooids: length as great as 3 cm.; divided into thorax, abdomen, and 

 postabdomen, the last very short ; both orifices 6-lobed. 



Branchial sac with twelve rows of stigmata. 



Intestine a very long, simple loop, the esophagus making one of its limbs; 

 stomach with folded wall situated near the loop. 



Sexual organs: gonads in the short postabdomen; ovary simple; testis in 

 many separate masses; embryos developed in the long, straight oviduct. 



Budding not known, probably stolonic. 



