Poly zoa from Port Phillip, 19 



The manuscript by Desmarest and Lesueuv explaining the 

 plates was found by M. Pergens in the Paris Museum. In 

 the ' Bulletin des stances de la Societe royale Malacologique 

 de Belgique,' tome xxii. (1887), M. Pergens gives a list of 

 the names of species given by Desmarest and Lesueur, and 

 appends thereto a list of names given by later authors. Tlie 

 greater part of the collection is preserved in the Havre Mu- 

 seum, the remainder having been lost. In the figures of 

 Lesueur several well-known species can be recognized. 



Tlie following names of species of Amathia are copied from 

 the list of M. Pergens : — 



Desmarest and Lesueur. M, Pergens. 



Sirinx Archimedi. Amathia spiralis, telle que Busk 



(Chall. Rep. Polyzoa, ii. p. 84, 

 pi. vi. fig. 2) figure. Je doute 

 si c'est reellement I'espece de 

 Lamouroux. 



spinosa. bicornis, Tenison- Woods. 



cruciformis. connexa, Busk. 



circumplicata. crispa, Lamarck. 



Amathia Bronguiartii. , sp. 



Lemanii. coruuta, Lamarck, 



The specimen described and figured by Busk as Amathia 

 spiralis^ Lamouroux, is probably A. convoluta^ Lamouroux. 

 The zooecia of the spiral are exsert, and not adnate to the 

 stem along their inner surfaces. 



Amathia pinnata, n. sp. (PI. II. figs. 5, 5 a.) 



Zoarium pinnately branched ; internodes long, occupied for 

 five sixths of their length by from twelve to sixteen pairs of 

 zooecia ; zooecia on the same face of the stem. Dimensions of 

 zooecia about "Sx '11 millim. ; breadth of stems '26 millim. 



The characteristic feature of this species is the regular 

 pinnate branching. Where the zooecia do not present any 

 special characteristic, the arrangement of the zooecia on the 

 stems and .branches and the mode of branching are almost 

 the sole means for classifying the species of this genus. 



Family Cylindrceciidse. 



Genus Cylindrcecium, Hincks. 



Cylindrcecium ahum, n. sp. (PI. II. figs. 7, 7 a.) 



Zoarium forming a slender, creeping, network stolon, 



2* 



