234 THOS. H. MONTGOMERY, JR. 



2. KEY TO THE SPECIES OF FLOSCULARIA. 



All the species of F/oscnlaria (Oken, 1815) described up to the 

 year 1886 are described and figured in the monograph of Hudson 

 and Gosse. Of those described since that date I have seen the 

 descriptions of all except uniloba Wierzejski (1892), so that this 

 species could not be included in the present key. F. brachyura 

 Barrois and Daday (1894) is considered unrecognizable : their 

 figure represents a much contracted specimen, and the diagnosis 

 is simply : " Pede rudimentario, in aculeo curvato exeunti, urcello 

 nullo." But I differ from Rousselet (1893$) in regarding tenuilo- 

 bata Anderson as distinct from coronetta Cubitt. F. chimcera 

 Hudson is included, although it is probable this form will be 

 subsequently found to belong to another family of the Rotatoria. 

 Unless otherwise stated all the species entered will be understood 

 to be sessile and to possess a gelatinous tube. 



I. Foot ending in two toes (pelagic ; no tube ; I dorsal eye ; corona with a smaller 

 ventral and a larger dorsal lobe which overhangs the corona). 



L-hiwizra Hudson (1889). 



II. Foot without toes or peduncle (pelagic ; foot very slender and whip-like ; a 

 single large dorsal coronal lobe and two smaller ventral lobes separated by a 



very slight constriction) atrochoides Wierzejski (1893). 



III. Foot terminating in a peduncle. 



A. Corona without lobes. 



a, I. Cilia short, in a single row (cilia mainly on dorsal and ventral margins of 

 the corona ; trunk much larger than corona and little shorter than foot ; 

 tube large) edentata Collins (1872). 



a, 2. Short and vibratile cilia on outer coronal margin, and on 5 prominences of 

 the inner margin longer, non-vibratile cilia (pelagic ; tubes very slender). 



pelagica Rousselet (18933). 



B. Coronal margin produced into lobes. 



a, I. Short cuticular spines on coronal margin (corona with 5 broad lobes, the 



dorsal largest, all bearing long and stiff cilia) spinata Hood (1893). 



a, 2. No cuticular spines on margin of the corona. 



b, I. Corona with a single (dorsal) lobe (foot much enlarged near its pos- 

 terior end ; 2 eyes ; a tuft of long cilia upon the dorsal lobe and 

 shorter cilia upon the remaining margin of the corona ; pelagic). 



libera Zacharias (1894). 

 b, 2. Corona with two lobes, a dorsal and a ventral. 



c, I. Lobes short, corona little wider than the trunk (short, non-vibratile 



cilia on the lobes only ; 2 cervical eyes) calva Hudson (1885). 



c, 2. Lobes large, corona much wider than the trunk (vibratile cilia on the 

 whole margin of the corona ; 2 eyes near the summit of the dorsal 



lobe) mutabilis Hudson (1885). 



>, 3. Corona with 3 lobes. 



