Srackionaea.] iNFtrsosiA.! aNimalcttles. 683 



name alludes to the resemblance of the lorica to a round flat smel- 

 ling-bottle. 



PoMPHOLYX complanata. — 'Lorica much, depressed, nearly circular, 

 with the lateral edges rounded ; anteriorly truncate ; occipital edge 

 gradually rising to a central blunt point ; mental ridge with two roun- 

 ded lobes, divided by a central notch. Lorica 1 -300th. 



Of the ensuing genera, established by Ehrenberg, we have only 

 met with the description of species ; of one, indeed, with only a 

 sketch of its relations. 



Genus Lakella, (Ehr.) — The following species of this new genus, 

 the characters of which we have not met with, is named by 

 Ehrenberg, — 



L. Piscis. — Body with equal setae, and three long fine hairs placed 

 on each side the mouth, with two frontal eyes. Length 1-I90th to 

 1-2 80th. Berlin. 



"Werncck has also seen this species. 



Genus Teteasiphon, (Ehr.) — We have not met with the detail of 

 the generic characters ; but they may be gathered from the descrip- 

 tion of the following species : — 



T. Hyd/rocora. — Very large, hyahne, with two prominent tubular 

 occipital organs, and other two near the termination of the back • 

 pancreatic glands, four, globose; jaws bidentate, with the oblique 

 rotatory organ of PleurotrocJia. Foot with slender, long, and acute 

 toes; eye occipital. Length 1 -36th and upwards. Berlin. 



Genus DironmA, characters unknown. 



D. artiscon (Ehr.) (Mentioned in Eeports of Zoology, Bay 

 Society.) Approaches Notommata, but diifcrs by a particular con- 

 striction of its tarsal nippers (toes). Found by Ehrenberg, at 

 Wismar, on the Baltic. 



t t % 



