URINARY DEPOSITS. [ 795 ] 



UROCOCCUS. 



represented, and the articles in which they 

 are described. 



Since the publication of the important 

 paper by Vigla (E Experience, 1839), in 

 which most of these deposits were first 

 illustrated, the use of the microscope has 

 constantly been called in to aid in their 

 detection. In regard to the pathological 

 indications afforded by their presence, upon 

 which we cannot enter, it may be remarked 

 that most of the deposits are* formed after 

 tlit- vacuation of the urine. 



Uric acid. PI. 12. figs. 1, 2; and Urates, 

 figs. 11 c, d, e, 13 a, 14 a (URic ACID and 

 URATES). 



Oxalate of lime. PL 13. figs. 9, 10, 11, 

 12 (LIME, Salts of). The concretionary 

 forms of this salt (figs. 11, 12) are more 

 slowly acted upon by reagents than simple 

 crystals. 



Ammonio-phosphate of magnesia, PI. 13. 

 figs. 1, 2, 3, 4 (MAGNESIA, Salts of). 



Carbonate of lime. PI. 13. fig. 8 (LiME, 

 Salts of). 



Cystic oxide. PI. 13. fig. 5 (CYSTIC 

 OXTDE). 



Blood-corpuscles. PI. 49. fig. 21, espe- 

 cially the form fig. 21 e (BLOOD). 



Mucous corpuscles. PL 1. fig. 6 (MotrTH, 

 p. 518). 



Pus-corjw-sdes. PI. 38. figs. 4, 5 (Pus). 



Spermatozoa. PL 50. fig. 25 (SPERMA- 

 TOZOA). These are found in the urine of 

 the female for several days after intercourse ; 

 and we have detected them in the uterus 

 more than a fortnight after the same. 



Sarcina ? PL 7. fig. 5 (SARCINA). 



Ftnn/f. Pcnmllium (fig. 557, page 584 ; 

 PL 26. fig. 15) and Torula (PL 26. fig. 7). 

 The spores of Penicittium form the so-called 

 small organic globules. 



Casts of the tttluli v. rinifcri. The extreme 

 diameter of these is rather less than that of 

 the tubules ; but they are often much more 

 slender. They are* cylindrical, generally 

 wavy, sometimes hollow, at others solid. 

 Some are very transparent, finely granular, 

 and are composed of fibrine ; others consist 

 entirely of, or contain imbedded in them, 

 renal epithelial cells, with or without glo- 

 bules of fat either free or within the cells ; 

 they sometimes also contain mucous and 

 pus-corpuscles, with blood-globules; some 

 of the epithelial cells occasionally contain 

 lithates. The epithelium of the bladder 

 agrees essentially in structure with that 

 of the pelvis of the kidney. 



BIBL. That of CHEMISTRY, Animal; 



Hoppe-Seyler, Chim. phys. fyc. ; Schmidt, 

 Vermch. $c. ; Griffith, Urinary Deposits 

 and Med. Gaz. 1843. 



URNATEL'LA, Leidy. A genus of 

 freshwater Polyzoa. 



Not yet found in Britain. 



BIBL. Leidy, Pr. Ac. Philadelphia, v. & 

 vii. ; and Allman, Polyzoa, 117. 



UR'NULA, Clap, et Lach. A genus of 

 Actinophryina (Rhizopoda). 



Char. Sheath membranous and fixed to 

 other bodies. U. Epistylidis (PL 52. fig. 15), 

 attached to the pedicle of Episti/lis plica- 

 tilts. (Clap, et Lach. Inf. 457.) 



UROCENTRI'NA., A family of Ciliate 

 Infusoria. 



BIBL. Clap, et Lach. Inf. 134. 



UROCEN'TRUM, Nitzsch. A genus of 

 Peritrichous Infusoria, family Urocentrina. 



Cltar. Free, no pedicle j tail awl-shaped ; 

 cilia absent from the body, but forming an 

 anterior crown ; mouth not spiral. 



U. turbo (PL 32. fig. 14). Body hyaline, 

 ovate, trilateral, tail one third the length of 

 the body. Freshwater ; length 1-430 to 

 1-290". (Cl. & Lachm. Inf. 134 ; Kent, Inf. 

 641.) 



UROCOC'CUS, HassalL A genus of 

 Palmellacese (Confervoid Alg8e),remarkable 

 for the peduncular processes formed by the 

 gelatinous coats of the cells. The cells are 

 invested by a gelatinous coat or membrane 

 (like that of GLCEOCAPSA), which is ori- 

 ginally simple ; but new gelatinous layers 

 are successively produced on the immediate 

 surface of the cell-contents ; and as each new 

 one is formed the preceding layer is rup- 

 tured on one side and partially thrown off, 

 the cell with its new layer lying in the pre- 

 ceding layer as in a cup ; by the repetition 

 of this process the cup-like exuviae accumu- 

 late, packed one within another so as to 

 form a peduncle, the structure of which may 

 be roughly compared to a pile of wooden 

 washing-bowls or tea-cups standing one in 

 another. When the cell-contents divide 

 into two portions, the peduncles bifurcate 

 (PL 7. fig. 7). The striae indicating the 

 successively shed coats are more or less di- 

 stinct in different species, and probably 

 in different conditions of the same. U. 

 flookwianus is represented in PL 7. fig. 7 ; 

 U. insiffnis is very much larger ; U. All- 

 ma mii and U. cryptophtia are much alike, 

 and neither presents the striae. A green 

 species is also described with the synonym 

 (erroneous ?) of Clilorococcum muralf, Grev. 

 Reproduction unknown. 



