DESCRIPTION OF SPECIES 75 



material I have counted eighteen stigmata in a half row. This is the same number as in many zooids 

 of S. sigillinoides. As in S. sigillinoides the zooids immediately surrounding the common cloacal 

 opening have a broad-ended atrial languet, but in other zooids it is pointed. The brood pouches are 

 long, narrow and coiled at the lower end. 



Larva. Embryos and larvae together numbering from ten to twenty-eight in a brood pouch are 

 present in some colonies collected in March. The larvae measure from o-6o to 0-65 mm. from the end 

 of the papillae to base of the tail, and could not be distinguished from larvae of S. sigillinoides, unless 

 by a somewhat longer tail, but this is a variable character. 



Remarks. In spite of its resemblance to S. sigillinoides, I do not doubt that S. georgiana is a valid 

 species. Its known range is confined to South Georgia and perhaps the South Sandwich Islands 

 (St. 363). It is not a form that has often occurred in any collections, and owing to its scarcity, little is 

 known of its biology. 



One colony from South Georgia (St. WS 33) has a shape very like that described for S. gaimardi 

 (Herdman, 1886). But as no characters other than the mushroom-shaped head and the large number 

 of embryos in the brood pouch seem reliable in that species, and the ' Discovery ' colony is without 

 embryos, I have included the specimen in S. georgiana. 



Distribution. Antarctic (South Georgia, ?South Sandwich Islands). 



Sycozoa anomala sp.n. (Text-fig. 20; PI. Ill, fig. 6) 



Holotype. Size: head i-8 cm., stalk 2-0 cm. long. St. 929. 



Diagnosis of species. Colonies hermaphrodite or unisexual. Zooids unisexual; female with coiled 

 brood pouch ; branchial sac with no parastigmatic transverse bars ; stomach smooth externally ; ovary 

 somewhat projecting below the abdomen. Larva with otolith but no ocellus. 



Occurrence. St. 929: North Island, New Zealand, 55-58 m. 



Colony (PI. Ill, fig. 6). The material consists of three single colonies and a compound colony with 

 four stalked heads. The largest of the single heads has a length of i-8 cm. and a breadth of 1-3 cm., 

 and is carried on a stalk of 2-0 cm. The compound colony has a basal stem of 1-3 cm. at the end of 

 which is a group of four stalks, the longest 1-3 cm. The heads of the isolated colonies are a little 

 flattened but the compound colony has round heads. The head is smooth and pale translucent buff- 

 grey, the zooids being visible as double rows of paler spots. Longitudinal furrows separate the ad- 

 jacent double rows. The stalk is rather paler than the head, widest at its attachment to the head, and 

 tapering towards the base. The compound colony has a certain amount of sand sticking to the basal 

 stem, but the other colonies are quite free of sand. At the apex of each head there is a single simple 

 common cloacal opening, through the centre of which the terminal common test may project slightly. 



Zoom (Text-fig. 20 A). The zooid is about 2 mm. in length, seldom more, and the thorax and abdomen 

 are of about equal length, except when the gonads are highly developed and projecting. The oral 

 siphon (o.s.) has six short pointed lobes and the atrial opening is large with a triangular atrial languet 

 (a. I.). The zooids surrounding the common cloacal opening have a wide languet with a few small teeth; 

 the remaining zooids have a narrower triangular languet without teeth. 



Branchial sac. There are about sixteen long slender oral tentacles of varying length. The four 

 rows of stigmata have no parastigmatic transverse bars. A short blunt languet is present on each 

 transverse bar of the left side. The stigmata are long and narrow, and number at least fifteen in each 

 row. The endostyle is wide. 



Gut. The oesophagus (oe.) is of moderate length, narrow and curved ventrally. The ovoid or pear- 

 shaped stomach (st.) has walls which are smooth externally, but internally are provided with minute 

 papillae. White pigment spots are scattered on the surface of the stomach. A short post-stomach (p.st.) 



