INDKX. XV11 



O*o* L ACEPHALA TESTACEA ( continued). 

 Cyrtodaria, 106 

 Panopea, 10? 

 Pandora, 107 



Byssomia, 107 



Hiatella, 107 



Sol.-n, 108 



Solen proper, 108 

 Sanguinolaria, 108 

 Psammobia, 108 

 Psammothea, 108 



Pholas, 108 



Teredo, 109 



Fistulana, 109 



Gastrochaena, 1 10 



Teredina, 110 



Clavagella, 1 10 



Aspcrgillum, 110 



ORBER II. ACEPHALA NUDA, 111 

 Fam. 1. SEGREGATA, 111 

 Salpa, 1 1 1 



Thaliae, 112 

 Salpa progper, 113 

 Ascidia, 113 



Theyton of Aristotle, 113 



I'atn. 2. AGGREGATA, 114 

 Botryllus, 114 

 Pyrosoma, 115 

 Polyclmum, 115 



Escharae, 116 



CLASS V.~ BRANCHIOPODA, 



116 



Terebratula, 117 



Spirifer, 117 



Thecidea, 117 

 Orbicula, 118 



Discinw, 118 



Crania, 118 



CLASS VI. CIRRHOPODA, 



Lepas, 119 

 Anatifa, 119 



PolHcipes, 120 



Cineras, 120 



Otion, 120 



Tetralasmis, 120 

 Balanus, 120 



