626 Wisconsin Academy of Sciences, Arts , and Letters. 
should be incomplete. The large size, brackish-water habitat, and 
the sketch of the trophi suggest close relationship to L. tecusa, 
but the figure of the foot and toes indicates a somewhat different 
species, and until more material is obtained at the type locality 
it would seem advisable to treat them as two distinct species. 
In this connection attention may be called to Dipodina arctis- 
con Ehrenberg, also said to be viviparous, described in a paper 
read before the Gesellschaft der Naturforschenden Freunde in 
Berlin on November 15, 1842. A report of the meeting was 
published in the Spenersche Zeitung, Berlin, for November 24, 
1842, and copied in Froriep’s Neue Notizen zur Nat nr- und- Heil- 
kunde, series 2, volume 24 (1842), page 184. The proceedings of 
the society for 1839 to 1859 were not published until 1912 (Sitz- 
ungsber. Ges. Naturf. Freunde, Berlin, 1839-1859. Berlin, 1912). 
On page 47 occurs the following: 
“Herr Ehrenberg. . . . Endlicli zeigte derselbe Abbildnngen und 
getrocknet erhaltene Exemplare eines unbekannten Raderthierchens der 
Ostsee bei Wismar vor, welches sich durch der beiden Zangenhalften 
seines Zangenfusses in zwei ganz getrennte Scheiden sehr auszeichnet, 
im uebrigen aber dem Genus Notommata ganz ahnlich ist. Er sah es 
lebendig gebahrend und hat ihm den Namen Dipodina arctiscon gegeben, 
wegen seiner Aehnlichkeit mit dem kleinen Wasserbaren, Arctiscon.” 
As far as known, no further description was ever published 
of this animal, nor have we been able to locate the drawing ex¬ 
hibited by Ehrenberg at the meeting; see page 633. 
lindia truncata (Jennings) 
Plate LIY, figures 1-5 
Notommata truncata Jennings, Bull. Mich. Fish Comm. 3 (1894): 16, 
figs. 10, 11.— Stenroos, Acta Soc. Fauna et Flora Fennica 17 1 
(1898): 125, PL 3, figs. 11, 12.— Lie-Pettersen, Bergens Mus. Aarbog 
(for 1909) 1910 15 : 41. 
The body of this species is elongate, spindle-shaped, and slen¬ 
der, the greatest width being about one fourth of the total length. 
The integument is moderately rigid; a number of transverse folds 
give it a annulate appearance. The color of the entire animal 
is a deep orange-brown. 
The head and neck segments are short and broad, their width 
being but little less than the greatest width of the body. The 
