MESOZOA, HEMICHORDATA, PHORONIDEA. Verm. 73 
lchthydium crassum n. sp., figg., Asuncion, drying banks of Paraguay R., 
von Daday, t. c. pp. 73 & 74. 
Lepidoderma elongatum n. sp., Aregua, close to L. rhomboides , von Daday, 
t. c. p. 74. 
Polyarthra fusiformis amongst Stylochceta , IIlowa, Zool. Anz. xxviii, 
' pp. 331-336. 
MESOZOA. 
Dicyemidce and Orthonectidce , reports on works of Max Hartmann, 
Lameere & Pelsener, Bull. Ac. Belgique 1905, p. 625. 
Rhopalura ophiocomce, R. pelseneeri , ciliated larva) sexually produced, 
giving rise to an asexual generation, Caullery & Mesnil, C.R. Soc. 
Biol. 1905, ii, pp. 431-433. 
R. ophiocomce , free mature female with larvco, from Amphiura squamata , 
Caullery & Lavall^e, t. c. pp. 265 & 266. 
R. pelseneeri , ciliated larva compared to infusoriform stage of Dicyemidce , 
R. ophiocomce , Caullery & Mesnil, C.R. Ac. Sci. cxli, p. 775. 
HEMICHORDATA and PHORONIDEA. 
Phoronidea ; general account, Harmer, Camb. Nat. Hist, vii, pp. 21-27. 
Pterobranchia ; general account, Harmer, t. c. pp. 21-27. 
Aclinotrocha , seasonal occurrence, Firth of Clyde, Browne, P. R. Soc. 
Edinb. xxv, 1905, p. 789. 
Balanocephala , see Enteropneusta, Karl Grobben, Claus Lehrb. Zool. ii, 
pp. 680-683. 
Balanoglossus , classed with Cephalodiscus and Rhabdopleura, Schepotieff, 
Bergens Mus. Aarbog 1905, No. 8; B. clavigerus chiaje (?), noted at 
Grado, Gulf of Triest, Graeffe, Arch. Inst. Wien xv, 1905, p. 317 ; 
B. tricollaris schmarda , in favour of which Spengel withdraws his 
subsequent Ptychodera . Spengel, Zool. Anz. xxviii, 1904, No. 2, 
pp. 52-54. 
Cephalodiscus , fig., morphology and systematic position, Schepotieff, 
Bergens Mus. Aarbog 1905, No. 8. 
Cephalodiscus , structure, development, affinities, pp. 18-124 ; C. levinseni , 
Japan, gracilis , Borneo, sibogae , Celebes, p. 7, spp. n., Harmer, Siboga 
Exp. xxvi bis. 
Cephalodiscus nigrescens sp. n., Antartic ocean, Lankester, P. R. Soc. 
London lxxvi, pp. 400-402, pi. viii. 
Phoronis, regeneration studies, figg., Schultz (390) tr. iii, iv ; P. psammo- 
phila , oscillating circulation, P. Enriques, Atti Acc. Lincei xiv, 
pp. 451-454. 
Rhabdopleura , list of species ; R. sp., figg., Harmer, pp. 125-129, Siboga 
Exp. xxvi bis. 
Tornarnia , seasonal appearance, Firth of Clyde, Browne, P. R. Soc. Edinb. 
xxv, 1905, p. 791. 
