Zoology.] NATURAL HISTORY OF VICTORIA. [Pohfzao. 



Plate 107, Fio. 1. 

 CATENICELLOPSLS PUSILLA (J. B. Wilson). 



[Genus CATENICELLOPSIS (J. B. Wilson). (Sub-kingd. Mollusca. Class Polyzoa. 

 Ortler Infundibulata. Sub-order Oheilostomata. Fam. Catenicollidaj). 



Gen. Char. — Polyzoary phytoid. erect, consisting of (usually) dicbotomously divided, 

 uniserial branches ; cells all facing the same way, arising by sbort, corneous tubes from the 

 upper and back part, or from the sides of other cells ; cells at a bifurcation geminate, or a 

 simple cell giving rise to the first of a series from its side ; a small avicularium on either side 

 superiorly.] 



Description. — Cells ovoid; mouth lofty, arched ahove, straight below; a pair 

 of long-, blunt, hollow processes above the mouth, and another pair, shorter and 

 thicker, opposite its lower part, with usually a minute avicularium at their bases 

 externally; front with a rounded foramen below the mouth; surface smooth or 

 minutely papillose ; back smooth ; ovicell immersed at the base of the upper of a 

 group of three coalescent cells. 



Reference. — J. Bracebridge Wilson, Tr. Mic. Soc. Vict. 1880. 



Spring Creek, near Geelong, Mr. J. B. Wilson. 



This species forms small glassy tufts, growing on other polyzoa 

 and algffi. The cells are ovoid, slightly curved forwards. The 

 mouth is lofty and slopes backwards. Ahove and behind the 

 mouth is, on each side, a long, blunt, digitiform process, and more 

 anteriorly, opposite its lower half, is a shorter, thicker, and usually 

 curved, similar process, which frequently has a small avicularium 

 on its outer aspect. On the front of the cell is a round or oval 

 opening raised on a slight elevation. The cells usually extend in 

 linear series from the upper and back part of those preceding ; but 

 they frequently originate by short, corneous tubes from their sides. 

 The branches arise from the cells of a geminate pair, from the sides 

 of single cells in a series, dichotomously from a single terminal 

 cell, or in three series from a geminate pair. The ovicell is 

 immersed in the base of the upper of a tricellate group, which is 

 either terminal or at a bifurcation. It is covered with tubercles or 

 raised pores. 



Explanation of Figures. 



Plate 107. — Fig. 1, specimen, natural size. Fig. la, small portion, magnified, showing 

 tricellate group and ovicell. Fig. lb, posterior view of the same. Fig. \c, small portion, show- 

 ing the origin of cells and branches from the sides of other cells. 



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