MAEINE BIOLOGICAL STATION AT PORT ERIN. 271 



mile out, 18 fathoms ; bottom dead shells, shell sand, and 

 echinoderm spines, with Spatangus purpureus, Echino- 

 cijamus pusillus, Porania pudvillus, Henricia sanguino- 

 lenta, Murex erinaceus, Xantho taherculatus. 



2. Off Kitteiiand, Ih miles out, 18 fathoms; bottom 

 , dead shells, with Ascidia mentula, Cynthia morns. 



3. North-west of Calf Sound, 2 to 3 miles off, 19 

 fathoms; bottom sand and shells, with Palmipes placenta, 

 Luidea ciliaris, Stichaster roseus, TJujone fiisns and T. 

 raphanus, Cellar ia fistidosa, Ascidia pleheia, Polijcarpa 

 coniata. 



4. North-w^est of Calf Island, 3 miles off, 20 fathoms ; 

 bottom sand and shell fragments, with Pectuncidus glij- 

 cimeris, Modiola modiolus, Pecten maximus. 



5. North-west of Burrow Kock, 3 to 4 miles off, 22 

 fathoms ; bottom shells, with Pectuncidus glycimeris, 

 Lissocardium norvegicum, Pecten maximus. 



6. North-west of Chicken Eock, 5 miles off, 25 fathoms; 

 bottom dead shells and some sand, with Sarcodictyou 

 catenata, Ghoetopterus sp., Ebcdia tuberosa, Ascidia 

 pleheia. 



7. One-and-a-half miles off Bradda Head, 18 fathoms; 

 bottom large shells and broken fragments, with Asterias 

 ruhens (very large*), Porania pidvillus, Ciona intestinalis. 



8. Two to three miles N.W. of Bradda Head, 21 

 fathoms ; bottom muddy sand, with many ophiuroids, 

 Cucumaria hyndmani. 



9. Four miles N.W. of Bradda Head, 23-25 fathoms 

 (several hauls) ; bottom sandy mud, many ophiuroids. 



* The specimens we dredge are very mueli larger than those we find on 

 the rocks of the neighbouring shore. Are there two varieties in the species, 

 a smaller shore and a larger deep-water form, or do the individuals move 

 outwards from the shore as they grow older ? 



