SHCON Dehn ORT on the POLYZOA of the L.M.B.c. 
DES ERICK. 
By JosepH Lomas, Assoc. N.S.S., 
SPECIAL LECTURER ON GEOLOGY IN UNIVERSITY COLLEGE, LIVERPOOL. 
[Read 12th April, 1889.] 
In the last report ninety-eight species of Polyzoa were 
recorded as occurring in the L.M.B.C. district. Since that 
time numerous dredging and shore expeditions have taken 
place, resulting in the addition of ten species new to the 
locality. These, along with a new species, described in the 
previous report as a new variety of Pedicellina gracilis, 
bring the total number up to 109. 
Membranipora flemingui, Busk, mentioned in the first 
report without any definite localities, has been met with 
off Anglesey, Calf of Man, Xc. 
The ‘‘Weathercock”’ expedition of August, 1886, is 
notable among those held since the former report for the 
abundance of Celleporas brought up. Cellepora pumicosa, 
C. costazu, C. armata, C. avicularia, and C. dichotoma 
were dredged in a deep hole (thirty-five fathoms), about 
ten miles from the Isle of Man, the three last being new 
to the district. Mucronella peachi, Scrupocellaria scruposa, 
Crisia cornuta, C. eburnea, Cellaria fistulosa, and Diastopora 
patina also appeared in this prolific region. 
The ‘‘ Hyena” expeditions of 1886, 1887 and 1888, and 
Easter, 1889, have also resulted in important additions 
to our fauna. While dredging near the Calf of Man, in 
May, 1888, a bank of dead shells, chiefly Pectunculi, was 
touched. The valves were thickly encrusted with Polyzoa, 
and twenty-three species were obtained, four of them 
