16 THE EOTIFEEA. 



vibratile tags. There are the usual sperm-sac and in-otusilc penis, the latter lying 

 " behind the foot under a valve-like flap." 



Length, of female, cir. ^Jj in. ; of male, cir. ,V i"- Habitat. Dimdee (J. H,) ; 

 Staines (Rousselet and Western). 



AsPLANCHNOPUS sYEiNX, Ehreiibcrg (PI. XXXIV. fig. 37). 

 Notommata syrinx .... Ehrenberg (42) ; Schmarda (134 and 135). 



SP. CH. Boiy bcU-sJuq)ed ; foot very small, scarceli/ visible : jaws (rami) curved, 

 bifid at the iwint. 



This Rotiferon, according to Ehrenberg, is very similar to A.vujrmeleo, but differs from 

 it in the follomng points. The surface of the head is convex ; the foot is hardly visible, 

 and has two minute toes ; the points of the rami are bifid ; and the vibratile tags are 

 not more than from eight to thirteen on each side. 



Schmarda fomid this Eotiferon in Egypt, and in a well on Adam's Peak in Ceylon. 

 He noticed in one foetus a secondary tooth to each ramus. No other observer appears to 

 have met mth this animal, except Weisse. 



Length. About ^V iiich. Habitat. Berlin (Ehr.) ; Egypt and Ceylon (Schmarda) ; 

 St. Petersburg (Weisse). 



AsPLANCHNOPUS EUPODA, Gosse (PI. XXXI. fig. 3). 

 As2>lanchna eitpoda Gosse (169). 



[SP. CH. Body globose, with a stout foot, retractile at will; rami of incus long, 

 each armed on its inner edge with four ividely-severed teeth. 



The most remarkable feature is the foot, which is, proportionally, much larger than 

 in A. myrmcleo. The pincer-like rami are those of a norxaal Asplanchna, having a close 

 resemblance to those of A. j^riodonta, save that their inner edges are not cut into saw- 

 teeth, but beset with three distant spinous teeth, while each curved poiut is double. I 

 have examined eight or ten examples, all from the canal, Smallheath, Birmingham. 



Length, ^'., inch. Habitat. See above ; lacustrine. P.H.G.] 



Sacculus saltans, Bartsch (PI. XXXII. fig. 24). 



Ascomorplia saltans ..... Bartsch (7, 8). 



SP. CH. Body vjith two dorsal longitudinal ridges, and tivo lateral ; lateral view 

 sac-like, nearly symmetrical ; head truncate, toith a Up-shaped projecting process on the 

 mid-dorsal edge of its base ; corona a simple marginal circle. 



The body of saltans is bounded (says Dr. Bartsch) by four surfaces which meet in four 

 longitudinal ridges, two dorsal and two lateral. Unlike viridis, its lateral \'iew shows a 

 dorsal outline very similar to the ventral ; and its flat head, with the thumb-like dorsal 

 process, is very different from the low cone which rises from the neck of Mr. Gosse's 

 Rotiferon. Its manners, too, are strilsing. Dr. Bartsch describes it as now hovering over 

 the same spot, now suddenly darting forward, now turning on its longer axis, and now 

 spinning round its transverse horizontal or vertical one ; and, when these antics are over, 

 agam returning to hover over the old spot as before. 



Length, yjj; inch. Habitat. Near Tiibingen (Bartsch). 



B.iccuLUs hyalinus, Kellicott (181), (PI. XXXII. fig. 23). 



SP. CH. Body hyaline, with tioo lateral, sub-dorsal grooves; lateral view oval, 

 almost symmetrical, the dorsal outline a little more curved than the ventral ; dorsal view 



