A f.'OLI.KCTlUX (W lIYI»i;(ill>S. 355 



Ectoderm liiiiuy i;'all. c. Inj. Eududeriu of liypostome. v. p- Endo- 

 dermal plug. e. s. Eetodernud sheet, ect. Ectoderm, end. Endoderm. 

 /. s. Fascicled stem. 



G. Gommgium. ;/. (Jail. ;/. c Germiii;d cells. <//. c Glandular 

 endoderm cell. ;/. o. Gouophores. gr. Loose granules, yr. r. Granular 

 cell. 



H. Hydrocaulus. //. Hypostome. Hij. Hydrocaulus. 



i.f. Ingested food (Copepod eggs). i. p. Inner expansion of ca'len- 

 teron. 



/. Joint (jf lateral or supra -calycine nematopliore. j. Joint. 



A',. Adcaiiline knobs of perisarc. k^. Abcauline knol). 



/. /. Lateral leaflet of corlmla. /. n. Large nematocyst. l.p. Lower 

 peg of perisarc. 



M. Medulla of alga. oi. Mesoderm. m. n. Mesial nematopliore 

 below hydrotlieca. ui. <i. Mature ovum. in. t. Moniliform tentacle. 

 mo. Mouth. 



n. Nematocyst. nu. Nucleus. 



0. Ovum. (>. c. Oral cone. o. (j. Old gall. 0. H. Outgrowth of 

 hydrocaulus. o. /(. Old hydrorhiza. o. 1. Older larva of Pycnogonum. 

 0. S. Opening for sarcostyle. o. .s. Old stem. op. Operculum, ov. c. 

 Oval cell. 



p. Perisarc. Jl^. Outer layer of perisarc. j).,. Inner layer of perisarc. 

 j>. c. Process from sucker-cell entering cell of alga. p. cp. Perisarc- 

 cup. p. g. Perisarc-groove. p. t. Proximal tentacle, pd. Peduncle or 

 blastostyle. ped. Peduncle of hydrotlieca. pJ. Planol.)last. p)lt. Plat- 

 form for battery of nematocysts. po. Pore. 



B. Hydrorhiza. r. Ridge. r. e. Reflexed endoderm. li. H. 

 Rounded-off hydi-anth. rd. Ridge. 



S. Sarcostyle. .s. e. Sheet of endoderm. S. E. C. Secondary endo- 

 derm-canal. 8. n. Small nematocyst. sp. Sponge, s^)/'. Spine, sp. t. 

 Spermatic tissue. St. Stomoda3uni. sup.n. Superior median nemato- 

 phore. 



t. Tooth. t. p>. Thin perisarc. t. pr. Termination of perisarc in 

 perisarc-groove. te. tentacles, th. Thickening of ectodermal sheet on 

 adcauline side. Th. Thread of nematocyst. th.p. Thick perisarc. 



u. e. Undifferentiated endoderm. 



V. Velum. V. c. Vacuolated endoderm cell. 



y. c. Tolk-containing cell. y.t-. Young embryo of Pycnogonum. 

 y. I. Young larva. 



VOL. 1, PART 3. 26 



