378 TORREY 



they are usually arranged in eight longitudinal rows in relation to 

 eight series of tubercles. This possibility is destroyed, however, by 

 E. intertnedia McM., which is described as possessing not more 

 than sixteen tentacles and scattering capsules and tubercles. In E. 

 sipunculoides no tubercles were seen. 



Finally, the rudimentary mesenteries do not offer the solution I had 

 hoped they might. It is true that E. beatitempsi and the San Pedro 

 Edivardsla are constructed on the same plan, i. e., according to Carl- 

 gren's Edwardsia type with the modification already suggested. E. 

 adenensis^ however, departs from this type and approaches the con- 

 dition found in E. sipunculoides^ since it has two rudimentary mesen- 

 teries instead of one in each lateral and dorso-lateral primary entero- 

 cceI. If these rudimentary mesenteries are conceived as foreshadowing 

 future tentacles, the gap between the species with sixteen tentacles and 

 those with more than sixteen is materially narrowed. At any rate, 

 the species with sixteen tentacles have no consistent mesenterial for- 

 mula. 



For these reasons I have felt justified in reuniting Edivardsiella 

 with Edwardsia^ redefining the latter in the light of recent facts. 



EDWARDSIA SIPUNCULOIDES Stimpson. 



(PI. XXIV, figs. 1-3; text-figs. 8-15.) 



Actinia sipunadoidcs Stimpson, 1853. 

 Edwardsia sipunculoides Verrill, 1862. 

 Edivardsiella sipunculoides Andres, 1884. 



Localities. — Dutch Harbor, Unalaska ; Eastport, Me. ; Grand Ma- 

 nan Island, New Brunswick ; Henley Harbor, Labrador. 



This species was originally described by Stimpson, in 1853, who 

 found a single individual at Grand Manan, N. B. He placed it provi- 

 sionally in the genus Actinia^ not caring to dissect his only specimen, and 

 thus remained ignorant of its internal anatomy. It was again de- 

 scribed, in 1862, by Verrill, who gave a full external description from 

 life with two figures which were copied by Andres in 1S84. I ven- 

 ture to quote Verrill's account entire, supplementing it later with a 

 discussion of the internal anatomy, which he entirely neglected : 



" Column very slender, elongated, cylindrical, the central portion 

 traversed by eight longitudinal sulcations, between which it is some- 

 what swollen in the form of broad, rounded, slightly prominent ribs, 

 crossed in contraction by numerous strong transverse wrinkles. The 

 inferior naked portion when expanded is about one half an inch in 

 length, pointed at the extremity, without any distinct basal disk, but 

 capable of adhering to stones by its membranous surface. This 

 region is marked with eight white lines, which meet at the cen- 



