1886.] 



MICROSCOPICAL JOURNAL. 



83 



aperture a2:>ical, the border produced 

 as a short, subcylindrical neck, the 

 • anterior margin truncate, not evert- 

 ed ; enclosed animalcule subspheri- 

 cal, yellowish. Height of lorica 

 ts'tttt' width at base ytoit i'^ch ; di- 

 ameter of enclosed zooid 75-7,77^ to 

 jgJ^y inch. Habitat. — The cypress 

 swamps of South Florida ; abun- 

 dant on various confervoid Alga. 



Chrysopyxis macrotrachela^ sp. 

 nov. (Fig. 9.) 



Lorica somewhat bottle -shaped, 

 the body triangular, about twice as 

 high as wide, the posterior border 

 truncate, the basal angles rounded, 

 the lateral margins converging, 

 slightly convex ; aperture apical, the 

 border produced as a long, narrow, 

 .subcylindrical neck -like prolonga- 

 tion, in length equaling or slightly 

 exceeding the height of the lorica- 

 body, the anterior margin truncate, 

 conspicuously everted. Height of 

 lorica without the neck ■^-^X)~isi width 

 at base y^Vo" *° TlVrr \ length of neck 

 TioViT to 2-g^^7r inch. Habitat. — \\\ 

 company with CJi. triangularis^ 

 but less abundant. 



Chrysopyxis ampitllacea^ sp. 

 nov. (Fig. 10.) 



Body of the lorica subhemispheri- 

 cal, the posterior border truncate, 

 the lateral margins rounded ; aper- 

 ture produced has a neck-like pro- 

 longation in length equalling the 

 diameter of the lorica, narrowest at 

 its origin, the lateral borders gradu- 

 ally diverging to the truncate frontal 

 margin. Height and diameter of the 

 lorica body and length of neck ^^-^^ 

 inch ; diameter of the enclosed ani- 

 malcule T^-^-^^ inch. Habitat. — The 

 cypress swamps of South Florida. 



Prorodon limiietis^ sp. nov. 

 (Fig. II.) 



Body ovate, subcylindrical, soft 

 and flexible, twice as long as broad, 

 slightly curved toward one side ari- 

 teriorly, the lateral borders gently 

 concave, both extremities rounded ; 

 cuticular surface longitudinally striate 

 finely and entirely ciliate ; oral aper- 

 ture eccentric, the oral cilia more 



conspicuously and abundantly de- 

 veloped than those of the general 

 surface ; pharyngeal passage a conical 

 rod-fascicle extending to near the 

 body centre ; contractile vesicle sin- 

 gle, spherical, postero-terminal, fre- 

 quently leaving after systole a number 

 of small, spherical vacuoles ; nucleus 

 ovate, laterally placed in the posterior 

 body-half; endoplasm semi-opaque 

 by the inclusion of numerous dark 

 corpuscles. Length of body ^\-^ inch. 

 Habitat.' — Standing water, with de- 

 caying vegetation from the cypress 

 swamps of South Florida. 



This form seems to most nearly 

 approach P. teres ^ Ehr., differing 

 from it chiefly in the somewhat ec- 

 centric position of the oral aperture 

 in the well marked antero-lateral cur- 

 \ature, and the slight but noticeable 

 concavity of the lateral borders. The 

 movements are rotary on the longitu- 

 dinal axis. 



PrachelophyUum clavatum^ sp. 

 nov. (Fig. 13.) 



Body elongate, flask-shaped or sub- 

 clavate, somewhat flattened, five to 

 six times as long as broad, elastic and 

 flexible, the neck-like anterior portion 

 scarcely distinguishable from the body 

 proper ; cilia vibrating irregularly 

 and somewhat independently ; oral 

 apertin-e terminal ; phar3nx an ob- 

 conical fascicle of fine rod-like ele- 

 ments, extending through the anterior 

 (jne-third of the body ; nucleus sin- 

 gle, ovate, subcentral ; contractile 

 \esicle single, spherical, postero- 

 terminal, frequently leaving two or 

 more smaller vacuoles after systole ; 

 endoplasm granular. Length of body 

 Y^-g inch. Habitat. — Standing water 

 on decaying vegetation from South 

 Florida. 



The animalcule's movements are 

 rather slow and smoothly gliding, 

 with frequent bending and curving 

 of the anterior region as the creature 

 searches heaps of detritus for food. 

 The pharyngeal fascicle is distinct 

 even during life, but after death by 

 iodine poisoning, the body becomes 

 tliffluent and the pharynx floats out 



