BELFAST DREDGING COMMITTEE, 935 
RS 
| Species. Observations. 
Saxicava arctica......sscseees living |75 fathoms, at roots of Sertularia. 
Ascidia mentula..,.........00 living |75 fathoms. 
Verruca Stromia living |90 fathoms. 
Balanus porcatus (Scoticus)| dead. 
—— crenatus ......++...++.| living |75 fathoms. 
Hyas coarctatus.....se0..eee- living |70 fathoms, small sized. 
Ebalia Pennantii .........+.. living |90 fathoms. 
| Munida Rondeletii_ ......... living |90 fathoms. 
| Pagurus Thompsoni? ...... living |90 fathoms. 
——= ]RVIS ........sceeeeceeeees living |90 fathoms. 
— Hyndmanni ............| living |90 fathoms. 
| Serpula triquetra ...,. hibdaes dead. 
__ | Amphidotus roseus ..... e...| living |90 fathoms. 
Spatangus purpureus......... living |90 fathoms, very small sized. 
_ | Echinocyamus pusillus ...... living |90 fathoms. 
| Echinus spheera.........000++ living |90 fathoms. 
: Solaster papposa .........0 living |100 fathoms, very small size. 
| Ophiocoma bellis ............ living |70 fathoms. 
| ——rosulla ....s.ceseeee .»-«.| living |75 fathoms. 
| Comatula rosacea ............ living |\75 to 100 fathoms. 
| Cyathina Smithii ............ living |75 fathoms. 
Several Zoophytes taken with the foregoing have yet to be fully examined, 
for which purpose they are in the hands of Professor Wyville Thomson, who 
has observed among them a new form of Sertularia. 
Zoophytes received from the North of Ireland. 
By Professor Wyville Thomson, Queen's College, Belfast. 
ZOOPHYTA HYDROIDA. 
TUBULARINA. 
Fam. 1. Corynide. 
Crava (Gmelin). 
__ C. multicornis, Font. Very common on seaweed between tide-marks. 
Belfast Bay, Strangford Lough, &c. Constantly dicecious. The males dis- 
tinguished from the females by the lighter and brighter colour of the repro- 
- ductive organs. In this species the Medusoid zooid is not developed. A 
_ very variable species. 
HyDRACTINIA. 
H.. echinata, Flem. sp. Common on old shells, usually associated with a 
Pagurus. 
i CorvyneE. 
 C. pusilla, Gaut. Abundant on seaweed between tide marks and on 
_ Zoophytes in the Coralline zone. 
EUDENDRIUM. 
_ #. rameum, Pall. Frequent in Belfast Lough. A specimen dredged off 
the Gobbins. Mr. Hyndman. 
_ #.ramosum, Ellis. Frequent in Belfast Lough. Off Crawfordsburn, male 
and female. In this species both male and female individuals developed 
_ Medusoid zooids. These zooids sometimes become early disengaged, and 
_ sometimes remain attaclied until the male and female generative products 
are fully matured. 
____ I have met with one or two other small species of this genus, but have not 
had an opportunity of examining them fully. 
