MABINE BIOLOGICAL STATION AT PORT ERIN. 279 



hydroids in our area is now ninety, and one of the dredg- 

 ing expeditions has given us interesting additions to 

 our fauna in Dicorijne conferta, which was growing on an 

 Aporrhais shell, and was only known previously from 

 Cullercoats, Orkney, and Shetland; and Sijncorijne exiinia, 

 with numerous sacks or " galls " containing young Pycno- 

 gonids. Of polyzoa 123 species and 15 varieties have 

 now been recorded. The most recent finds are Crisia 

 ramosa, which was recently described by Harmer from 

 Plymouth, and which we find also at Port Erin, and 

 Microporella impressa, var. a., found by Miss Thornely at 

 Port Erin in July. 



Mr. E. T. Browne has, during some visits to Port Erin, 

 paid special attention to the Medusa, and has drawn up 

 a list of about twenty species, one of which, at least, 

 Ampliicodon fritillaria , has not previously been recorded 

 for British seas. The most interesting capture which he has 

 made consists of several specimens of a beautiful Siphono- 

 phore, which appears to be a species of Halistemma, cer- 

 tainly new to the district and probably to the British fauna. 

 Professor M'Intosh recorded a Halistemma in 1891 from 

 St. Andrew's Bay, but our Port Erin species is not the 

 same. Mr. Browne describes the colony as being about 

 25 mm. in length when expanded; it has a pneumato- 

 phore, about 6 large nectocalyces, about 4 polyps, with 

 hydrophyllia, and long tentacles armed with clusters of 

 nematocysts. The polypes and pneumatophore are of a 

 deep reddish colour. The colonies were found in April, 

 1894. 



The yellow variety (?) of Sarcodictyon {Clavidaria) 

 catenata, of which we dredged several colonies on August 

 25th, off the north-west of the Calf Is., in 22 fathoms, is 

 an interesting addition to our fauna. It has only been 

 found before in Loch Eyne and at two other spots on the 



