124 A MONOGRAPH OF THE TERTIAKT POLYZOA OF VICTORIA. 



10. /. dicergens, n.sp. PI. XVIII., lii,'. 1. 



Branclies dichotomously divided, rounded in front, flattened behind. Zoa-cia 

 in obli([iie lateral rows, semispiral or irres^ularly arranged, numerous, distinctly 

 separated by louijitudinal grooves and narrow lines ; thyrostouie circular, turned 

 slightly forwards. Dorsal surface smooth, with narrow, raised white lines diverging 

 I'roni the centre to the circumference. 



B. 



The zoo3cia are arranged in series, but these are very irregular. Several are 

 distinctly bilateral, in some there is only one series obliquely across the front, while 

 again in others the series are much broken and numy of the zoct'cia irregularly 

 placed. The dorsal surface is smooth but has a series of narrow, raised, white lines 

 diverging upwards and outwards from the central line. Of these there are generally 

 two to embrace the outer extremities of the zooecial series. This species forms a 

 transition to the genus FUisparsa, and is evidently closely related to Jullien's 

 Tervia solida. 



11. /. semispiralis, n.sp. PI. XVIII., fig. 1. 



Branches round, dichotomously divided. Zo(jecia very long, in s^jiral series 

 nearly extending the whole circumference of the branch ; surface punctate ; 

 thyrostome elliptical, slightly projecting forwards. 



M.C. 



Allied to /. hifrons (Waters), but there is no break in the zooecial series 

 in front. 



12. /. liiihieaua, D'Orbigny. PI. XVII., figs. 1, 2. 



T. mlhieaua, D'Orbiguy, Voy. dans I'Amerique meridionale, V., p. 20 ; Busk, 

 B.M.C., III., 12 ; id., C.P., II., 13 ; Smitt, Floridan Bryozoa, Pt. I., 8 ; McG., 

 P.Z.V., 68 ; /. (jieheliana, Stol., Poss. Bry. Orakei Bay. 



Zoarium spreading; branches dichotomously divided, broad, anterior surface 

 convex. Zoacia in o})posite curved series of 2-5 on each side, and usually an azygos 

 one in the middle, distinct, but closely connate, except at the extremities, and much 

 curved forAvards ; surface rough, with close-set small i-aised pores ; internal aspect 

 of zooecia similarly furnished. Dorsal surface Avith longitudinal ridges separated by 

 sulci, and in older parts transversely corrugated. 



M.C. ; B. Living. South America, Plorida, Australia. 



I am not sure that some of the specimens I have referred to this may not 

 belong to the closely-allied living I. interjuncta (McG.). 



