4= Dr. Johnston on British Annelides, 



triangular-ovate bluntly-pointed spreading segments of the limb. 

 Anthers cordate-ovate, apiculate. Corona closely adpressed to 

 the corolla ; its processes rather shorter than the tube of the co- 

 rolla, broad, adpressed, deeply notched : the lobes diverging, trun- 

 cate and fimbriated ; separated by narrow linear interspaces, which 

 occasionally extend almost to the base of the corolla, but usually 

 the corona is continuous throughout half its length. The form of 

 the summit of the coronal processes will be seen to vary consider- 

 ably, but always retains a general outline very different from that 

 of any other species with which I am acquainted. Germen round- 

 ish. Styles seated upon elevated prominent tubercles. Stigmas 

 simple. 



Introduced from the East Indies with the seed of Meliiotus 

 officinalis, upon which plant it preys. 



EXPLANATION OF PLATE I. 



Fig. 1 . Cuscuta approximata, Bab. 



a. The growing plant. 



b. Clusters of flowers. 



c. The calyx with an unopened corolla. Magnified. 



d. An expanded flower. Magnified. 



e. The corolla greatly magnified and laid open in order to show the 



structure and proportions of the corona. 

 e'. Slightly different forms of the corona observed in other speci- 

 mens. 

 /. The germen. 

 Fig. 2. Cuscuta Epithymum, Murr. 



c, d, 8f e. The calyx, expanded flower, and the corolla laid open, 

 showing the corona. 

 Fig. 3. Cuscuta TrifoUi, Bab. 



c, d, e Sf f. The same parts as before. 



II. — Miscellanea Zoologica. By George Johnston, M.D., 

 Fellow of the Royal College of Surgeons of Edinburgh. 



[Continued from vol. xv. p. 148.] 



[With a Plate.] 



Class Annelides. Order Errantes. Family Nereides. 



Section Nereides non-tentaculat^. 



No tentacular cirri : the antenna rudimentary. 



Genus Pollicita*, Johnston. 

 Char. Body serpentiform : head rather indistinct^ with three 

 small frontal antennae : eyes four : proboscis large, without jaws, 



* This worm has been already published under the name of Behryce 

 Peripatns (Thompson's Rep. on the Fauna of Ireland, p. 273), but, having 

 discovered that the generic name has been used by Philippi, I am under 

 the necessity of changing it. 



