MARINE BIOLOGICAL STATION ON PUFFIN ISLAND. 13 

 NUDIBRANCHIATA. 



Mr. Clubb and I have been carrying on oar observations 

 on Nudibranchs during the last year whenever opportunity 

 offered. We went to Hilbre Island on February 20tli, to 

 attend the 20-foot tide. Althougli low water was not till 

 6 p.m. wlien it was rather cold and dark, we succeeded in 

 finding the following species: — Eolis paj/illosa (spawning), 

 Acanthopiiole coronata, Cort/phella rn/lhranrhi<ilis, Cuthona 

 nana (?), Galviaa jy'icta {two distinct colours), Deudrouotus 

 arhorescens (many of all sizes), Ancula cristata (very abun- 

 dant, and spawning) and Doris hilamellata (spawning). 



In regard to the otlier animals noticed on this occasion it 

 may be mentioned that the spawn masses of Arenicola and 

 of Scoloplos wxre abundant in pools on the sand. The 

 Hydroid Zoophyte Garveia nutans was also abundant. 

 This form is certainly spreading in the district and has 

 been found twice this year at Puffin Island, by Mr. 

 Thompson on April 4th, and by myself on October 26th. 

 The masses of SaheUaria alveohda at Hilbre were found to 

 be spreading and to cover a large area. Many young 

 colonies of Alcijoniuni digitatuni were observed, and many 

 small specimens of Sahella. The starfishes which are 

 usually so very abundant were almost entirely absent on 

 this occasion. No young mussels, and ik) specimens 

 of Hydrohia were found. 



A month later, in March, we made a second trip to 

 Hilbre at a very low ebb, accompanied by Dr. Hanitsch, 

 and again succeeded in obtaining a number of Nudi- 

 branchs. We found several specimens of the i-are Coryplielii 

 landshunji. This is apparently the first time this species has 

 been found in our dist.ict since the two ori<;inal specimens 

 recorded by Dr. Byerley in 1849 and 1853. These new 

 specimens afforded us the opportunity of re-describing the 



