POSITIOX AND DISTKIBUTIOX OF SAGARTIA LUCI.E. 735 



I have sectioned a number of examples collected at Plymouth 

 and find that they agree in all essential points with thofre from 

 the New England coast. The irregularity of the mesenteries 

 Avas somewhat more pronounced, one individual (text-fig. 3), for 

 example, showing in sections through the aboral half of the 

 stomodajum only two pairs of perfect mesenteries, situated 

 opposite one another, one pair being directives attached to a 

 Avell-developed siphonoglyph, while in the other pair the muscle 

 pennons were on adjacent sui'faces and there was no siphono- 

 glyph. The members of this second pair, however, were attached 

 to the stomodfeum opposite the middle of its longer axis, and, 

 although there were no mesenteries of younger cycles intervening, 

 it seems probable that they represent members of two different 

 pairs, II. and VI., there having been a failure of regeneration, 

 after longitudinal fission, of the typical mesenteries. In the 

 intervals between the directives and each of the other perfect 

 mesenteries there were representatives of two other imperfect 

 cycles, sj'mmetrically an-anged, those representing the second 

 cycle bearing reproductive elements. 



Text-fio-ure 3. 



Diagram of the avran^'emeiit of the mesenteries in an individual from Plvmouth. 



Nor is the story of the distribution yet complete. In the 

 summers of 1909 and 1911 I collected at the Canadian Biological 

 Station at Departure Bay, on the east coast of Vancouver Island, 

 an Actinian whose superficial resemblance to S. lucice of ISTew 

 England was most striking, the only noticeable diflference being 

 a somewhat greater average size. They were of the same green 

 colour, the column was adorned with the same characteristic 

 longitudinal stripes of yellow or orange, and the tentacles showed 

 the same form and coloration. They were found on Jesse Island, 

 not far from the station, among the barnacles that closely 

 covered the face of a large rock, in such a situation that for hours 

 each day they were exposed by the tide. This was the only 

 location in which they were observed in these years ; but on a 

 third visit to the station in 1912, I found them quite abundant 

 in slight depi'essions and crevices in the sloping rocks forming 



