pro to spasm (protospazm)

[ pro to spermatoblast (prō-to-spėr'ma-tō-blåst), η. [ group Prot other i a; any prototherian. Prot other i a (pro-to-theʼri-ä), n. pl. [NL., Protozoa tebræ are developed. They soon disappear, being replaced by definitive vertebræ. pro to vertebral (prō-to-ver'tē-bral), a. [ Protovertebrata (prō-tō-ver-tē-brāʼtä), n. pl. [NL.: see pro to vertebrate. ] A hypothetical group of animals, a umed to have been the ancestral forms of the Vertebrata. pro to vertebrate (prō-tō-ver'tē-brāt), a. [ protovertebræ: as, the pro to vertebrate stage of a vertebrate embryo.-2. Of or pertaining to type of which the existing monotremes are the only known representatives. Huxley , Proc. Zoöl. Soc., 1880, p. 653. prototherian (prō-to-the'ri-an), a . and n . [ Protovertebrata . Prot other i a + -an .] I. a . Primitively mamma- lian; primeval or pertaining to the Prot other i a in either sense. II. n. A member of the Prot other i a , hypo- thetical or actual. -to-tra-ke-ata), n . pl . (Salter), πρῶτος , first, + σπογγιά , a sponge.] A genus of ly acine hexactinellid an sponges, including the oldest known forms of fo il sponge, from the Menevian beds of the Lower Cam brian of Wales, as P. fenestrata. protospongian (prō-to-spon'ji-an), a. Primitive, as a stage in the evolution of sponges or in the development of a sponge. Hacckel. We have not been able to separate the Protospongian stage of Haeckel from the ascula, and think it should be merged in the latter. Hyatt , Proc. Bost. Soc. Nat. Hist., XXIII. 86. pro to spore (prōtō-spor), n . [ πρῶτος , first, + σπόρος, seed.] In bot ., one of the primary or apparent spores of certain fungi, corre sponding to the prothallus of the higher cryp togams. Pro tost aped if era (prō-to-stap-e-dif'e-rä), n. pl. [NL., Stapedifera . Thacher , 1877. Pro to stigma (prō-to-stig'ma), n. pl. [NL. (Lesquereux, 1877), pro to stoma (prō-tos'tō-mä), n.; pl. protosto mat a (prō-tos-to'ma-tä). [NL., In some kinds of gastrule the pro to stoma is also called anus of Rusconi; in others, a blastula pore. Haeckel, Evol. of Man (trans.), I. 194. Protosymphyla (prōtō-sim-fi'la), n. pl. [NL., protosymphylar (prōtō-sim-fi'lär), a. [