_POLYCHAETA OF THE PORT ERIN DISTRICT. 65 
+Potamilla reniformis, Miill.—So far this has only 
been found in one of the aquarium tanks, where it has 
recently appeared. 
ERIOGRAPHIDAE. 
tMyzicola infundibulum, Mont.—This species also 
has only occurred in the tanks, and then only a few 
specimens. 
tAmphiglena mediterranea, Leyd.—Found by Mr. 
Chadwick, but not recorded. [It may be of interest to 
note here that I have found a specimen of Amphiglena 
mediterranea in the Zoology Department, Liverpool 
University, collected by the late Mr. I. C. Thompson at 
Penmaenmawr in 1885, but never identified. | 
SERPULIDAE. 
Serpula vermicularis, Ellis.—Common everywhere 
in the dredge. 
*Serpula reversa, Mont.—Dredged off the Carron. 
According to Hornell this is ‘‘ the most abundant deep 
water Serpulid’’ in the Liverpool district, but I have 
only found it once at Port Erin. 
Pomatoceros triqueter, L.—Common everywhere in 
the dredge. 
Filograna implexa, Berk.—Common in _ dredged 
material. 
Spirorbis borealis, Daudin.—Common, both littoral 
and in deep water. 
*Spirorbis lucidus, Mont.—Dredged off the Calf 
Island, on Sertularia abietina. 
tSalmacina dysteri, Huxley.—For this also I am 
indebted to Mr. Chadwick; his specimen is the only one 
I have seen. 
