178 



ZOOLOGY 



SECT. 



(coronary groove) into an apical region or cone (en.) and a marginal region or 

 crown , the crown is again divided by a second, rather irregular horizontal 

 furrow into a series of pedal lobes (pd. /.), adjacent to the cone, and a series of 

 marginal lappets (mg. lp.), forming the free edge of the bell. In some of the 

 Coronata, such as Pericolpa, the pedal lobes and marginal lappets correspond 

 (i.e. are in the same radii) ; in others (Periphylla, Ephyropsis) they alternate. 

 In Pericolpa four of the pedal lobes, inter-radial in position, bear 

 tentaculocysts (tc.) ; four others, per-radially situated, give origin to long, 



FIG. 133. Pericolpa quadriga ta. A, external view-; E, vertical section, circ. s. circular 

 sinus ; en. cone ; g.f. gastric filaments : non. gonads ; my. lp. marginal lappets ; itmb. 

 manubrium ; mth. mouth ; pd. 1. pedal lobes ; st. stomach ; It. tentacles ; tc. tentaculo- 

 cysts ; in. toiiioles. (After Haeckel.) 



hollow tentacles (I.). In the more complex genera there are eight additional 

 ad-radial tentacles. 



The mouth (mth.) is very large, and leads by a wide manubrium (inub.) into 

 a spacious stomach (st.), which is continued quite to the apex of the cone. In 

 the wall of the stomach are four wide per-radial slits, leading into an immense 

 circular sinus (circ. s.). As in Lucernaria, there are four wide inter- radial in- 



