AND SPEC IKS or Ul'DROtDA, 259 



Gonosome. Xot kuovvn. 



Localiti/. Japan, Capt. St. John. 



This Campanularian is remarkable for the comparatively large 

 size of its hydrotheca?, with their elegantly crenate lip. It oc- 

 curred creeping over the stems of a Thuiaria {T. crassicaulis) . 

 The specimen is well preserved, many of the hydrauths being 

 still quite perfect in the hydrofchecse ; but the absence of all 

 knowledge of the gonosome renders its reference to the genus 

 Campanularia entirely provisional. 



CampanulariA grandis. Plate XII. figs. 2-4. 



Trophosome. Hydrophytou consisting of creeping, tortuous, 

 smooth, more or less aggregated tubes, which send oif from dis- 

 tance to distance the peduncles of the hydrothecse ; peduncles 

 slightly thinner than the tubes from which they spring, scarcely 

 attaining a length equal to that of the hydrothecse, immediately 

 below which they have a node-like enlargement. Hydrothecfe j,j 

 of an inch in height, gradually narrowing upwards, and termi- 

 nating with an abruptly everted lip. 



Gonosome. Gonangia springing in a dense cluster from the 

 aggregated basal tubes, nearly sessile, lageniform, with strong 

 longitudinal ridges, slightly exceeding a quarter of an inch in 

 height. 



Locality. Japan, Capt. St. John. 



The con>pa.ratively enormous size of the hydrothecse constitutes 

 a very remarkable feature in this Hydroid. It is also strikingly 

 marked by its very large, lageniform, ridged gonangia. 



The adherent portion of the hydrophyton consists of strong 

 tubes which creep over the surface to which it has attached 

 itself In the specimen examined it had taken possession of 

 another Hydroid {Selaginopsis fiosca), the older parts of whose 

 stem it had enveloped in a close plexus. This plexus had entirely 

 replaced the stem which had originally given it support ; and it 

 was from this part that the gonangia sprung m a cense group. 

 They had the appearance of being sessile, but are in reality borne 

 each upon a very short peduncle. Their large size and the peculiar 

 w^ay in which they were grouped together suggested at first the 

 possibility of their being only the ovarian nidus of a gastero- 

 podous moUusk instead of the gonangia of the Hydroid. They 

 attain about the size of the nidus of Biiceimtm JapiJIus ; and it 

 was only by a careful examination that their real nature was 



LINN. JOTJEN. — ZOOLOGY, TOL. XTT. 19 



