COLLECTED ON THE ' CHALLENGER ' EXPEDITION. 355 



cesses the peristome supports 2-4 spines, which in the perfect 

 zooecia are replaced by a recumbent globular ocecium, having a 

 rounded fissure in front ; the surface otherwise of the ocecium is 

 smooth and polished. A very few interspersed avicularia, with 

 an excessively delicate membranous mandible of a broadly lanceo- 

 late form. 



Sab. Prince Edward's Island, 80-150 fms. ; parasitic on My- 

 riozoum truncatum. And St. 150, lat. 52° 4' S., long. 71° 22' E., 

 150 fms., on Onchopora Sinclairei. 



22. C. BILABIATA, n. Sp.* 



Char. Zoarium pisiform, very minute. Zooecia very irregularly 

 disposed, erect, pitcher-shaped. Orifice circular, emarginate ; 

 peristome thick and often produced into a rather deep bilabiate 

 cup. On some zooecia a short, strong, conical preoral process. 

 Ocecia small, spherical, recumbent. 



Sab. St. 161. Off Port Philip, 38 fms., sand. St. 135. Off Tris- 

 tan d'Acunha, 60-1100 fms., rock. Parasitic on Amatliea spiralis. 



The collection affords only one or two small specimens. 



23. C. signata, n. sp.f 



Char. Zoarium pisiform. Zooecia deeply immersed and very 

 confusedly arranged ; surface smooth, shining. Orifice arcuate, 

 with a straight lower lip, having a very minute median notch. A 

 strong, curved, hollow, preoral rostrum, with an avicularium on 

 its posterior aspect near the summit, with a short, obtuse spatu- 

 late mandible pointing upwards. A few large interspersed avi- 

 cularia with broad spatulate mandible. Ocecia erect, flattened 

 in front, on which is a semicircular area, punctured (not grooved) 

 round the border. 



Sal. St. 304. Lat. 46° 53' S., long. 75° 11' "W. ; 45 fms., sand. 

 Parasitic on a Sertularian. 



24. C. conica, n. sp.J 



Char. Zoarium forming small conical growths, disposed several 

 together in a stelliform manner (parasitic on a Sertularian). 

 Zooecia, surface rugose, obscurely punctured when very young. 

 Orifice clithridiate ; peristome thick, sometimes raised into a 

 ridge on one or both sides. Preoral rostrum cylindrical, short, 



* " Chall. Eep." pi. xxx. fig. 2. t " Chall. Eep." pi. xxx. fig. 3. 



\ " Chall. Eep." pi. xxviii. fig. 10. Subsequent observation renders it pro- 

 bable that the form here described represents the young condition of a large 

 branched and lobate form, which also occurs in S. Africa, but is not in the 

 ' Challenger ' collection. 



