1917 Pomona College Journal of Entomology and Zoology, Vol. IX, No. 1 , March 



Littoral Ascidians Collected at 

 Laguna Beach 



The specimens reported upon are from a collection made by P. A. 

 Lichti during the summer of 1915, and from a small collection 

 brought in during the summer of 1916. The determinations of all 

 but the fifth were kindly made by Prof. W. E. Ritter. 



Ascidia calif arnica Ritter and Forsythe 

 These simple forms were found quite abundantly under stones 

 and in kelp holdfests. The form of the body was determined largely 

 by the position the animal took on the stone or seaweed. 



Styela bamharti Ritter and Forsythe 

 The specimens obtained were young, simple, of a redish-brown 

 color and about 4 mm. high. They were found under stones at 

 low tide but not as commonly as some others. 



Sty la montereyensis Dall 

 A single specimen of this large, simple species was taken just off 

 shore. It was slender at the base, expanded near the openings and 

 of a redish-brown color. 



Euherdmania claviformis Ritter 

 This slender species was often found in clusters under stones. 

 They were about 2 mm. in diameter and 10-20 mm. long, sometimes 

 free from sand, at other times covered with sand grains. 



Goodsiria dura Ritter 

 Bright red or orange masses of these were often found in bits of 

 seaweed from deeper water. The individuals were 2 to 3 mm. 

 across and often closely massed on the seaweed or other support. 



Eudistoma diaphones Ritter and Forsythe 

 This was the common compound species found closely attached to 

 the lower sides of stones. It was often quite extensive but not thick 

 or colored. 



Eudistoma psamion Ritter and Forsythe 

 Great masses of this tough, pinkish or slightly colored form 

 were found under rock ledges. It resembles one of the sponges in 



