WEST COAST HYDEOIDS 59 



are almost half immersed, to those even longer than the figures 

 would indicate. I have compared these specimens vrith others 

 from the Atlantic Coast and can see no reason for considering 

 this a separate species. ^Moreover, on the same colony there ap- 

 pear gonangia as smooth and as elongated as those figured for JL. 

 anguina, and others as stout and as much annulated as that fig- 

 ured by Hincks*^ for A. ahietina. In all of them the border is 

 turned in to form a somewhat funnel-shaped portion, like an in- 

 verted collar. The border is ornamented ^nth a ring of sharp 

 teeth. 



The name. Ahieiinaria anguina, should be retained for the 

 species originally described as Sertularia anguina by Trask. It 

 would have been much easier to trace his species if he had seen 

 any gonangia, but by making a series of comparisons it is pos- 

 sible to trace it to A. coei Nutting, as distinct from Sertularia 

 filicula, with which Dr. Torrey associates it. 



Trask 's fig. 1. PI. Y, is evidently the same as that figured by 

 IMurray, in fig. 2a, PI. XI, as S. lahrata. Fig. 2 shoAving this in 

 natural size, corresponds with A. coei Nutting in its definitely 

 pinnate arrangement, and decidedly geniculate stem above the 

 first pinna, while A. filicula is branched many times, so that the 

 pinnate arrangement is obliterated. This latter figure agrees 

 with the natural size fig. 5 in table 14. given by Kirchenpauer 

 for A. lahiata. The figs. 5a. 5b and 5c in the same table, repre- 

 sent gonangia similar to those figured in plate XXXIII, for A. 

 coei Nutting, these being quite different from those of A. filicula, 

 which are well figured by Hincks.** in fig. 3b. PI. LIII. and by 

 Ellis and Solander,« in fig. C, PI. 6. 



It is probable that it is on account of its mode of growth that 

 Trask speaks of its resemblance to S. fallax Johnston, because in 

 its definitely pinnate arrangement, it more nearly resembles S. 

 fallax that Johnston has figured in PI. XI,*'' than it does the loose 

 arrangement of <S^. filicula as figured in PI. XIV of the same work. 



Clark in one of his papers*' describes S. anguina and mentions 



43 British Hydroid Zoophytes, 1868. PI. LV. 



44 British Hydroid Zoophytes, 1868. 



45 Xatiiral History of Zoophytes. 1786. 



46 British Zoophytes, 1847. 



4- Hydroids of the Pacific Coast, 1S76, p. 255. 



