264 J- Playfair Mc Murrich, 



coloration of tlie two forms iieed not be regarded as a bar to their 

 identity coiisidering' the variability in this respect presented by P. 

 cleniatis. It seems to me very probable that the existence of 

 acrorhagi in A. pluvia was overlooked on account of its coloration, 

 for in the descriptions of A. florida and A. clematis they are stated 

 to be either white or yellow or red, and it niay be that in individuals 

 in which the prevailing- color was orange they wonld not be readily 

 perceived. Dana's Statement as to their absence is, however, so 

 deflnite that I have included the term with an interrogation in the 

 list of Synonyms given above. 



There is, furthermore, a probability that Vebrill's Eucladacüs 

 yrandis is also a synonym. The flgure which Vehkill gives of the 

 species (1899) has certainly but little resemblance to the specimens 

 of P. clematis that I have seen, the tnbercles being represented as 

 arranged in deflnite rows separated by distinct intervals. In the 

 description, however, it is stated that it is "a large species with the 

 entire surface of the column covered with close vertical rows of 

 crowded elongated papillae" (1869), and again "They [the tubercles] 

 are thickly crowded over the entire surface". Verrill gives as the 

 ränge of the species Paita, Peru to San Salvador and states (1869) 

 that the species seems to be the most abundant one of the Panamian 

 Zone. I have seen in the Museum of Natural History, Turin 

 specimens of a form from Ecuador which is certainly identical with 

 P. clematis'^), a fact which strengthens the supposition that Verrill's 

 form is also identical. 



Family Sagartiidae Gosse, 1858. 



Actininae with an adherent base ; sphincter mesogloeal or rarely 

 endodermal; mesenteries arranged in several cycles, longitudiual 

 muscles usually diffuse, parieto-basilars and basilars unequally deve- 

 loped; acontia present. 



Sub-family Sagartiinae Verrill, 1868. 



Sagartiidae with more than the flrst cycle of mesenteries perfect ; 

 column wall usually thin and perforated by cinclides. 



1) I may add that Carlgren had inspected these specimens before 

 my Visit to Turin and had identified them as P. elpniatis. 



