280 Mr. F. Walker on some undescribed Ceylon Insects. 



by turns touching it, and as it were testing it. In the course 

 of a few minutes the lips had closed upon the atom, and it was 

 seen dilating the stomach as it slowly made its way downwards. 

 Sarcodictyon appears to me to approach very closely to the 

 Helianthoid type. This genus on the one hand, and Zoanthus 

 on the other, are probably the links by which the two suborders 

 Alcyoniaria and Actiniaria are united. I have never had an 

 opportunity of examining Zoanthus, but think it probable that 

 isolated calcareous spicula will be found scattered in its tissues. 



EXPLANATION OF PLATE IX. 



Fig. a. Sarcodictyon catenata : a single polype expanded. Magnified 



12 diameters. 

 Fig. b. The same, of the natural size. 

 Fig. c. A tentacular pinna. Magnified 85 diameters. 

 Fig. d. A pinna contracted and crushed flat between the plates of the 



compressorium. Magnified 250 diameters. 



Sandhurst, Torquay, Sept. 27th, 1858. 



XXX. — Characters of some apparently undescribed Ceylon In- 

 sects. By F. Walker. 



[Continued from p. 209.] 



Fam. Buprestidae. 



Chrysobothrys suturalis. Cupreo-purpurascens, subtus cyaneo- 

 viridis aureo nitens, frontis lateribus thoracisque margine antico 

 auratis, elytris basi auratis, sutura cyaneo-viridi. Long. 4 lin. 



Agrilus sulcicollis. Nigro-seneus, thorace transverse sulcato, 

 elytris punctatis foveolatis, lateribus antice emarginatis. Long. 

 l£lin. 



Fam. Elateridae. 



Cardiophorus humerifer. Niger, capite, thorace et elytris basi 

 runs, elytris punctato-lineatis, luteo bifasciatis. Long. 3 lin. 



Corymbites dividens. Rufa, capite, antennis, thoracis vitta pos- 

 tice abbreviata, elytrorum triente apicali abdominisque apice nigris. 

 Long. 3^ lin. 



Corymbites divisa. Rufa, pubescens, capite, antennis, elytrorum 

 dimidio fere apicali abdomineque nigris. Long. A\ lin. 



Athous punctosus. Niger, dense pubescens, capite thoraceque 

 confertissime punctatis, antennis pedibusque piceis, elytris punctato- 

 lineatis, Long. 6 lin. 



Athous inapertus. Niger, ferrugineo sordido dense tomentosus, 

 capite thoraceque subtilissime punctatis, elytris punctato-lineatis, 

 pedibus rufescentibus. Long. 4 lin. 



