C. P. ROU88ELET ON DIPLOIS TRIGONA. 125 



under the name of Monommata grandis. This animal had not the 

 red spots, bat Dr. Biitzow figures the lateral antennas exactly 

 where the red spots are situated in my animal. The red colour of 

 the spots disappeared at once upon treatment with osmic acid, 

 whilst the colour of the cervical eye remained. This leads me to 

 think that the colour of these spots is very unstable, and may 

 sometimes be absent. I have no doubt that the two animals are 

 the same, and as Dr. Tessin- Biitzow has given it a specific name 

 I have adopted it as a variety. 



The rejected genus Monommata was formed by Bartsch for the 

 reception of this and another very dissimilar species — Notommata 

 tigris, and Bergendal, in his " Rotatoria of Greenland," strongly 

 advocates the retention of this generic name for Furcularia longi- 

 seta. The genus Furcularia no doubt contains a number of dis- 

 similar animals, some with a frontal eye, some with a cervical eye, 

 and some with no eye at all. This, however, will be a question 

 for the future, and in the present note I will describe my Rotifer 

 by the name by which it is best known. 



A mounted slide of both F. longiseta and of the var. grandis will 

 be deposited in the cabinet of the Club. 



Anurcea cruciformis (Thompson), PI. VII., Fig. 6. 



In the " Proceedings of the Liverpool Biological Society " for 

 1892 (p. 77) Mr. J. C. Thompson described this marine Rotifer, 

 which was found in large numbers off the coast of Norway, but 

 without giving a figure. Mr. Thompson has been good enough to 

 send me a mounted slide of the lorica, from which I have made the 

 drawing on PI. VII., Fig. 6. The lorica is subovate and flat, 

 armed in front with six short, equal, acute, nearly straight spines, 

 and no spines behind, and tessellated so as to show a cruciform 

 marking. The tessellation is formed by one central longitudinal 

 line crossed by two transverse lines, dividing the lorica into 

 six nearly equal parts; a number of smaller tessellations occur 

 at the margin and behind. The shell of the animal, which was 

 preserved in spirit, is thin, white, transparent, and very finely 

 stippled. 



Size, t !~q in. by y^- in. wide ; some specimens smaller. 



Professor K. M. Levander in his recently published contribution 

 to the Sea and Freshwater Fauna of the neighbourhood of 



Journ. Q. M. 0., Series II., No. 37. 9 



