Five New Floscules, &g. By Dr. Hudson. 167 



It is worthy of remark that Cubitt's F. coronetta carries two small 

 pencils of radiating setae near the base of the dorsal lobe. 



In the specimens that I have seen it was easy to make out 

 both the eyes and horseshoe-shaped row of vibratile cilia at the 

 mouth-funnel. None of the specimens exceeded l-50th of an inch 

 in length. 



The ten (or eleven) species of the genus Floscularia may be 

 arranged as follows : — 



* Lobes without knobs. 



w+ii Q 1 (Not separated by f Two processes on dorsal lobe i^. -Hboc?M. 



Witn d large 1 Q^inute ones .. \ No processes F. trifolium. 



° ^^' I Separated by two minute ones F. ambigua. 



I Lobes broad, de- ( Peduncle short F. campanulata. 



pressions distinct \ Peduncle very long . . .. F. lowjicaudata. 



Lobes round and small, depressions indistinct . . F. Cyclops. 



** Lobes knobbed. 



i Flexible process on dorsal 

 lobe F. cornuta. 

 No process F. ornata. 



Lobes linear F. coronetta. 



With 7 lobes F. regalis. 



and perhaps F. proboscidea. 



I find that I have omitted to mention that Mr. Hood found on 

 one or two occasions a Floscule inhabiting a trumpet-shaped tube, 

 and that he thinks this also is a true species new to science. I have 

 not had the good fortune to see the rotifer, as it died in the transit, 

 but I have great hope that neither this species nor " the Panged 

 Floscule " will escape Mr. Hood's energetic search and keen sight 

 during the coming summer. 



Note on Prof. Leidy's genera of Acyclus and Dictyo^hora. 



Professor Joseph Leidy has lately discovered and described * a 

 very curious new rotifer, which ought, I think, to be placed near the 

 Floscules. He says, " While examining some Flumatella diffusa 

 from the Schuylkill river below Fairmount Dam my attention was 

 attracted to several groups of Megalotroclia alba attached to the 

 tubes of the former, and surrounding another animal of strange and 

 novel character. This, on examination, proved to be a remarkable 

 rotifer without rotary organs. . . . This new rotifer I propose to 

 name Acyclus inquietus (fig. 31), from its being destitute of wheels 

 or ciliated disks, and from its apparently restless habit. It is con- 

 siderably larger than Megalotrocha, measures nearly a half line 

 long, and can be readily distinguished in groups of the latter with 



* Proc. Acad. Nat. Sci. Philad., 1882, pp. 243-50 (1 pi.). 



