958 



PROCEEDINGS OF THE NATTOXAL MUSEUM. 



VOL. XXVI. 



Fir:. fi.—V.t 



AKT OF SECTION THROUGH THE BASAL PART OP A STEM OF CORVMORPH, 



Woods Hole; ,}, exdoderm. For other lettering see Figs. 4 .-S. 



PENDULA FRO.M 



a deep coral red when found; they ai-e not common." One of the 

 specmiens i. complete, though it i,s somewhat mutilated, the tentacles 

 and the sexual peduncles having suffered espe- 

 cially. The second specimen has no hvdranth. 

 An interesting structural feature is discovered in 

 sections of the stem in the form of an unusually 

 thick support- lamella, the Stiitzlamella of Eeich- 

 ort; it stains readily, and is found between the 

 ectoderm and endoderm, well marked, in all parts 

 of the stem. Sections through the basal part of 

 the stem show many thread cells in the ectoderm 

 also the relation of the filaments to that layer.' 

 The filaments show no signs of cellular structure 

 and are evidently developed from the ectoderm 

 fig-. 5. There is but little left of the endoderm- a 

 remnant of it is seen in fig. 4, a. Sections of 

 the hydrocaulus of Corymorpha j>enduU^ figs. 6, 

 < , show a simular thick support-lamella between 

 the ectoderm and the endoderm. In the filament- 

 bearing part there are manv thread cells as in 

 the Alaskan form, and farther up the hydrocaulus 

 ;.,,,. lui . ^^^*^^"®^%ers decrease in thickness. While this 



It until « know definitely as to its genetic relations. 



Fig. 7. — A portion of the 



SAME section AS FiG. 6, 

 Bt'T A LITTLE HIGHER fp 

 ABOVE THE REGION OF THE 

 BASAL FILAMENTS. 



I 



