NO. 1555. HA WAIIAN IJOLOTHURIAXS— FISHER. 725 



LXXXl, fig". 2.) Besides the four or five smooth holes on border of 

 handle, several very fine perforations are occasionally interpolated 

 irregular!}^ between these and the edge. The anchors are 0.4 to 0.45 

 mm. long. On the edge at the point where the flukes join are three 

 or more inconspicuous granuliform protuberances. The flukes are 

 sometimes slightly twisted ott' their proper plane, and are thus asym- 

 metrical. The small rosettes are subcircular and 0.0135 to 0.0189 

 mm. in diameter. They are more numerous on the lighter portions 

 of the integument (especially ventrad) than on the darker, and are so 

 arranged as to give the efl'ect of marbling under low power of micro- 

 scope. When they are particularly a1>undant they leave more or less 

 open circular spaces (where they are only scattered) in which an 

 anchor and its plate occur. In the perisome surrounding the mouth 

 are numerous rods 0.0675 to 0.135 mm. long, smooth except for the 

 tops, which are slightl}^ swollen and bluntly toothed or merel}^ rough-, 

 ened (Plate LXXX, fig. Id). No rods in digits as in Euapta godeffroyi, 

 but relatively few rosettes occur there. 



This strikingly colored synaptid is abundant in the shallow water of 

 Pearl Harbor, at Aiea, and other localities. From the shore one may 

 see numerous individuals slowh' crawling over the soft bottom among 

 the scattered sea weeds. Man}^ specimens were taken with a dip net 

 from the boat landing at Doctor McGrew's place, Aiea. When the 

 animal is moving the tentacles are slowly brought into play. The 

 large globular excrescences, which frequently form five series along 

 the body, may possibl}" aid in locomotion, although numerous indi- 

 viduals without these were observed creeping about. It will be noted 

 that these protuberances do not form double rows as in Synajyta 

 macidata [i. e., heselii] and Opheodesotna glahra. 



This species is closely related to OpJieodemina cjlahra (Semper). I 

 have sent .specimens to Dr. H. L. Clark, who believes that they are 

 referable to glahra, as he is inclined to minimize the importance of the 

 cartilaginous ring. After a thorough reexamination, I am unable to 

 agree with Doctor Clark and have decided to keep the form separate, 

 although in a difl'erent genus from that in which I originally placed it 

 (Synaptida). Thus, following Doctor Clark, I have considered the 

 form of the calcareous particles as of generic value, rather than the 

 presence of a cartilaginous ring. 



The following characters in parallel columns will serve to contrast 

 spectaliUs and glahra. The authorities^ for the statements concerning 

 glabra are in parentheses. Neither Doctoi- Clark nor I have seen 

 specimens of this species. 



