151 
70. Fusus Islandicus (broken), rare. 
71. Trophon clathratus, rare. 
FaM. XLVI. — CONIDiK. 
72. Mangelia tnrricula, very rare. 
73. 
rufa, rare. 
74. 
JJ 
nebula, rare. 
75. 
costata, rare. 
76. 
?? 
septangularis, rare. 
Fam. XLVII. — Cypr^zVD/E. 
77. Cyprsea Europsea, common. 
Fam. XLVIII. 
78. Cylichna cylindracea (Holyhead 1), rare. 
79. „ obtusa, rare. 
Sponges — very few, common species. 
Foraminefera — Potymorpbina, Biloculina Lagena, Den- 
talina. 
Zoophytes — few ordinary species. 
Medusce — seen in the luminous waves in the autumn — 
jelly fish and Portuguese man-of-war. 
Hydrozoa — The most interesting of these beautiful crea- 
tures found in the bay are the crimson winged jelly fish, 
“ aurelia aurita” chiefly in the summer season, and the 
large species, Rhizostoma Cuvieri, in the spring. Many of 
the specimens I examined this Easter had a diameter of 14 
inches, and weigh about lOlbs. They present a most exqui- 
site appearance when alive, and are fine examples for dissec- 
tion and study. 
The Medusse are in myriads in late summer, and give the 
bay a luminous and flashing star-like aspect on Avarm nights. 
The rarest and most striking of the Hydrozoa is Physalia 
pelagiea, one of the Portuguese men-of-war. After a 
south-western gale, it is frequently met with by the oyster 
dredgers floating into the bay, and some of them are ulti- 
mately driven on shore amongst the rocks. I have found 
