1C THE ROTIPEEA. 



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

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



Length, of female, cir. - 5 in - '. of male > cir - A in - Habitat. Dundee (J. H.) ; 

 Staines (Rousselet and Western). 



ASPLANCHNOPUS SYEiNx, Ehrenberg (PI. XXXIV. fig. 37). 

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



SP. CH. Body bell-shaped ; foot very small, scarcely visible ; jaws (rami) curved, 

 bifid at the point. 



This Eotiferon, according to Ehrenberg, is very similar to A. myrmeleo, but differs from 

 it in the following 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 found 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 with this animal, except Weisse. 



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

 St. Petersburg (Weisse). 



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

 Asplanchna eupoda Gosse (169). 



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

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



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

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

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

 teeth, but beset with three distant spinous teeth, while each curved point 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). 

 Ascomorpha salterns ..... Bartsch (7, 8). 



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

 sac-like, nearly symmetrical ; head truncate, with a lip-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 view 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 striking. 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, 

 again returning to hover over the old spot as before. 



Length, T | 7 inch. Habitat. Near Tubingen (Bartsch). 



SACCULUS HYALINUS, Kellicott (181), (PI. XXXII. fig. 23). 



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

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



