ZOOLOGY AND BOTANY, MICROSCOPY, ETC, 245 



it is often less, and the shell apparently sessile. The animal is 

 attached to the bottom of the sheath ; the peristome is narrow and is 

 protruded only a short distance beyond the edge of the aperture. The 

 contents of the zooid's body are finely granular ; the nucleus of the 

 usual bandlike pattern. The animal is very timid, and very rarely 

 ventures beyond its shield while under observation. 



The same author also describes * Ejpistylis Niagarce n. sp., which 

 occurs on the crayfish of the Niagara, and probably on other con- 

 venient supports, although not yet found elsewhere. It fastens upon 

 the antennae and exoskeleton, forming whitish, mucilaginous patches. 

 The pedicle branches dichotomously, is smooth, attains 1/10 of an 

 inch in length, and bears many zooids. So far the characters are 

 closely those of E. pUcatilis or E. Anastatica, both abundant in the 

 same river. The zooids are elongate, more than three times as long 

 as broad, slightly gibbous, much attenuated at the lower extremity. 

 The body is constricted below the peristome border, which is thickened 

 or collar-like. The ciliary disk is continued above the peristome as a 

 prominent boss-like granular body. The inclosure is fine granular, 

 the cuticle smooth. The nucleus is flat, twisted, and placed trans- 

 versely at the upper third of the body. When contracted the ovoid 

 bodies have a snout-like projection which is strongly striate longi- 

 tiTdinally. Length of body fully expanded • 0064 in. 



Dr. A. C Stokes describes f several apparently new infusoria from 

 putrid waters, Heteromita putrina and Tillina saprophila from an 

 infusion made by placing the tail of a dead rat in river water, and 

 T. inflata from an infusion of the outer layers of the bulb of a Chinese 

 Narcissus. 



Dr. A. C. Stokes also describes | a Pyxicola which he believes to 

 be new, and names provisionally P. constricta. He has also found § 

 Salpingoeca urceolata S.K. in fresh water, or at least a fresh-water 

 variety of it. 



J. Kiinstler describes || a fifth species of Nyctotherus, N. Duboisii, 

 which inhabits the intestine of the larva of Oryctes nasicornis. 



Reproduction in Amphileptus fasciola.Tf — Dr, A. S. Parker 

 believes he has observed a method of reproduction not hitherto 

 described in the Infusoria. His attention was attracted by a peculiar 

 oscillating movement, the Amphileptus rocking from side to side, the 

 animal remaining stationary, although its cilia were in active motion. 

 In other respects the animal appeared normal, no changes being 

 observed in its nucleus, protoplasmic contents, or contractile vesicle. 

 Shortly afterwards he found that the elongated extremity was 

 breaking up into small masses of protoplasm; these gradually 

 separated from the parent body, and each of them exhibited distinct 

 amcBboid movements. Although the cilia seemed to break off with 



* Bull. Buifalo Naturalists' Field Club, i. (1883) pp. 115-6 (1 fig.). Proc. 

 Amer. Soc. Micr., Gth Ann. Meeting, 1883, pp. 110-1 (1 fig.), 

 t Amer. Natural., xviii. (1884) pp. 133-40 (5 figs.). 

 X Amer. Mon. Micr. Journ., v. (1884) pp. 24-5 (1 fig.). 

 § Ibid., pp. 25-6 (2 figs.). 



II Journ. de Microgr., viii. (1884) pp. 86-92 (1 fig.). 

 i Proc. Acad. Nat. Sci. Philad., 1883, pp. 313-4. 



