151 
70. Fusus Islandicus (broken), rare. 
71. Trophon clathratus, rare. 
Fam. XLVI. — CoNiD^, 
72. Mangelia tnrricula, very rare. 
73. 
rufa, rare. 
74. 
nebula, rare. 
75. 
55 
costata, rare. 
76. 
55 
septangularis, rare. 
Fam. XL VI I. — Cypr.ead/e. 
77. Cypraea Europsea, common. 
Fam. XLVITI. 
78. Cylichna cylindracea (Holyhead 1), rare, 
79. „ obtusa, rare. 
Sponges— Yerj few, common species. 
Fomminefera — Polyrnorpliina, Bilocnlina 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 Medusae are in myriads in late summer, and give the 
bay a luminous and flashing star-like aspect on warm nights. 
The rarest and most striking of the Hydrozoa is Fhysalia 
pelagica, 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 
