der niederen Thiere während des Jahres 1803 137 



oral side of the um pennate , the partitions forming the line of 

 divergence; marginal muscle a single ligulate ring, forming a con- 

 tinous , thickened projecting frim to the urn, outside the tentacles 

 and the anchors ; gelatiniform layer conspicuous, varying in thick- 

 ness in the urn and pedicel. C. cyathiformis Sars. 



Gen. dub. Depastrum Gosse. Distinguished by following fea- 

 tures: disk octagonal; the tentacles spring from the margin or with- 

 out it; no anchors. D. cyathiforme Gosse. 



Fam. Elentherocarpidne. Each genital half, projecting 

 freely into the discal camerae , extends in a dircct line from the 

 inner or axial end of a partition to or toward the end of an arm ; 

 the four quadrant camerae of the disk simple. 



Gen. Lucernaria Müll. Disk broad funnel-form; the eight 

 arms elongate, in closely approximated pairs, so that the oral side 

 of the disk apjDcars qnadrate ; pedicel monocamerous ; tentacles in 

 groups on the end of each arm; radial and transverse development 

 of each group equal; marginal anchors none; genitals transversely 

 folded bands which extend to the end of the arms; muscles of the 

 pedicel four, equidistant, projecting like ridges or pilasters from 

 the surface of the camera ; the principal muscles of the disk ligulate, 

 each one extending from the proximal end of a partiton to the end 

 of an arm ; marginal muscle ligulate, very thin at the base of the 

 tufs of tentacles ; gelatiniform layer thin in the disk, moderately 

 thick in the pedicel. Lucern. quadricornis Müll. 



Gen. n. C n Ir ad n s > a Cl. Disk infundibuliform ; the eight 

 arms nearly equidistant , prominent ; pedicel monocamerous with 

 four equidistant rounded pilasters : tentacles in groups on the end 

 of the arms close to the aboral edge ; outer row pistilliform and ha- 

 ving the same function as the anchors in other genera; radial and 

 transverse diameter of group equal; anchors none; genitals trans- 

 versely folded bands extending to the end of the arms; the digiti- 

 form bodies alone extend across the proximal end of the partition ; 

 muscle of the pedicel a continuous.thin layer of transversely dispo- 

 sed fibrillae, forming a cylinder between the outer ad inner walls, 

 and imbedded in the gelatiniform layer; the principal muscles of 

 the disk ligulate, each one extending from the proximal end of the 

 partition to the end of an arm ; marginal muscle ligulate, modera- 

 tely thick , but at the outer base of the tufs of the tentacles very 

 thin; gelatiniform layer thickest at the edge of the disk, but thins 

 out almost entirely half way toward the pedicel, and then in the 

 latter grows thick again where it is divided into two layers or 

 concentric cylinders by the intervening muscular cylinder; the four 

 pilastres are also gelatiniform, and not muscular, as are the pila- 

 sters in the pedicel of L. quadricornis. C. campanulata Larax, 



