CHAPTER IV. 



THE CRUISES OF THE ' PORCUPINE ' (continued). 



From Shetland to Stornoway. Phosphorescence. The Echinothuridce. 

 The Fauna of the ' Warm Area.' End of the Cruise of 1869. 

 Arrangements for the Expedition of 1870. From England to 

 Gibraltar. Peculiar Conditions of the Mediterranean. Eeturn to 

 Cowes. 



, APPENDIX A. Extracts from the Minutes of Council of the Royal 

 Society, and other official documents referring to the Cruise of 

 H.M.S. 'Porcupine' during the Summer of 1870. 

 APPENDIX B. Particulars of Depth, Temperature, and Position at 

 the various Dredging-stations of H.M.S. * Porcupine' in the 

 Summer of 1870. 



%* TJie bracketed numbers to the woodcuts in this chapter refer to the dredging- 

 stations on Plates IV. and V. 



WE left Lerwick on the 31st of August, and ran 

 south- and westward, passing close to Suniburgh 

 Head ; Pair Isle, of evil repute among mariners, 

 lying on the southern horizon like a little grey 

 3loud. The weather was still very fine, and we 

 lad a good tossing with scarcely a breath of wind 

 n the famous Roost of Sumburgh. Past Norna's 

 yrie on the ' Pitful Head ; J past in the falling 

 hadows of the autumn night the rocky Island of 

 ? oula, still the haunt of one or two pairs of the 

 reat skua gull, Lestris cataractes, a species fast 



L 



