Table 1. Algae Observed at Rincon Island-Continued 



Division 



Scientific Name 



Phaeophyta 



Cystoseira osmundacea (Menzies) 

 Desmarestia herhaaeae Lamouroux 

 Eotoaarpus sp. 

 Egregia laevigata Setchell 

 Halidrys dioiaa Gardner 

 Maaroaystis pyrifera (Linnaeus) 

 Pterospongium rugosum Dawson 

 Pterygophora oalifomiaa Ruprecht 

 Ralfsia sp. 



IV. THE FAUNA 



The number and kinds of animals found on and around Rincon Island is 

 as varied and numerous per given area as can be found in any of the more 

 distant offshore Channel Islands. The following discussion is not meant 

 to be conclusive, but simply to list the major species of animals seen at 

 the island in the 16 years since construction was initiated. 



Porifera : Over 24 species of sponges have been observed on the island, 

 but only 14 have been identified. Sponges range from the tiny and simple 

 ascon type to the large and quite complicated leuconoid type. Many of the 

 sponges form thin colorful splashes on the rocks while others get to be 

 quite large and easily recognized. These animals provide food, shelter, 

 and camouflage for many other larger animals. 



The following sponges have been identified at Rincon Island: 



Table 2. Sponges at Rincon Island 



Common Name 



Geode sponge 

 Lavender sponge 



Lavender-blue encrusting sponge 

 Leaf sponge 



Little Leaf sponge 



Wliite sponge 



Cream sponge 

 Thistle sponge 

 Finger sponge 

 Noxious sponge 



Urn sponge 

 Liver sponge 



Orange puff-ball sponge 



Sulfur sponge ^^^^^ 



Scientific Name 



Geodia mesotriaenia Lendenfeld 

 Haliahoalona gellindra 



de Laubenfels 

 Halialona eabasis de Laubenfels 

 Hymeniaoidon sinapium 



de Laubenfels 

 Hymeniaaidon ungodon 



de Laubenfels 

 Leucetta losangelensis 



(de Laubenfels) 

 Leuaetta sp. 

 Leuconia heathi (Urban) 

 Leuoosolenia sp. 

 Lissodendoryx noxiosa 



de Laubenfels 

 Rhabdodermella nuttingi Urban 

 Spheaiospongia confoederata 



de Laubenfels 

 Tethya aurantia (Pallas) 

 Verongia thiona de Laubenfels 



62 



