448 INFUSORIA. APPENDICULATA. 



ORDER I INFUSORIA APPENDICULATA. 



With projecting parts at the exterior of the body, as hairs, a 

 kind of horns, or a tail. 



The animals of this order are very minute, gelatinous, transparent, and of various 

 forms. 



Gen. 1. FURCOCERCA, Lam. Cercaria, Muller. 

 Body very small, transparent, rarely ciliated, furnished with a 

 diphyllous or bicuspid tail. 



F. podura, Lam. Cylindrical, acuminated behind ; tail subcleft. 

 Inhabits marshes Lam. i. 447- 



F. crumena, Lam. Cylindrical, ventricose ; fore part obliquely trun- 

 cated, and with a linear bicuspid tail. Found in infusion of ulvae. 

 Lam. i. 448. 



Gen. 2. CERCARIA, Lam. 

 Body very small, transparent, diversiform, with a simple tail. 



C. gyrinus, Lam. Body rounded; tail acuminated. Found in ani- 

 mal infusions. Lam. i. 445. 



C. cyclidium, Lam. Oval, subemarginate behind ; tail exsertile. 

 Inhabits pure waters. Lam. i. 446. 



Gen. 3. KERONA, Lam. Mull. 



Body very small, diversiform, without particular tail, furnished 

 with scattered cirri or stiff hairs on some part of its surface. 



K. rostellum, Lam. Orbicular, membranaceous, one side angular, 

 the other with a series of triple horns. Inhabits river and sea 

 water. Lam. i. 442, 



K. histrio, Lam. Ovate-oblong, the fore part with black puncti- 

 form horns, behind with longitudinal pinnules. Inhabits rivers, 

 among Confervae. Lam. i. 443. 



Gen. 4. TRICHODA, Lam. 



Body very small, transparent, diversiform, destitute of particu- 

 lar tail, and furnished with soft hairs over the whole or a part 

 of the surface. 



* Body with hairs over all the surface. 

 T. mamilla, Lam. Body spherical, opaque, with an exsertile papilla. 



Inhabits marshes. Lam. i. 435. 



T. viridescens, Lam. Cylindrical, opaque ; thickest behind. In- 

 habits sea water. Lam. i. 435. 



** Body hairy on some part of its surface. 

 T. grandinella, Lam. Spherical, pellucid, crenated above. Found 



in pure waters and in vegetable infusions. 



T. horrida, Lam. Subconical, broadish before, obtuse behind, with 

 deflexed setae. Found in the water of the mussel. Lam. i. 439. 



