NO. 1555. HA WA II A N no L TIIURIA NS— FISHER. 'J 21 



This species, the t3'^pe of which came from the Hawaiian Islands, 

 may be readily disting-uished from other synaptids of the region hv 

 the number of tentacles. Semper records the species from Samoa, and 

 it has been taken also at Amboina, Rotuma, and Kosseir (Red Sea). 



Genus EUAPTA Ostergren. 



Euapta Ostergren, Day Syytviu der Syiuiptideii, Ofv. Ak. Forh., No. 2, 1898, 

 p. 112. Type, Euapta (oliin SijiKiiiia) yoikfmijl (Semper).— Sluiter, 8iboga 

 Holothurioidea, 1901, p. YIW. 



Synapta (part) Authors up to ( )ster<j:reii. 



Tentacles normally 15(18 to LT) pinnate, with numerous digits either 

 free or united by web for half their length. Cai'tilaginous ring absent. 

 Stock of anchors branched, arms smooth, I)ut ^n'sot in middle of arch 

 (opposite end of shaft) with numerous small gramdiform protuber- 

 ances. Anchor plates with a large central hole, surrounded by six 

 (or seven) other large holes, all toothed," except that adjacent to 

 handle, which is toothed on inner part of circumference onl\ . Handle 

 of plate arched over b}' a curved rod with four supports, i. e., it 

 joins the plate in two places, on either side. The handle or attached 

 end of anchor plates with two large and several small smooth holes, 

 one of the large holes situated on each side of the rather acute outer 

 end of the usual large median hole of the handle; the latter, as well as 

 the lateral holes of the handle, is spanned by the arched rod. Cal- 

 careous ring without conspicuous anterior projections. Madreporic 

 canal single (or very few and dorsally situated). Retractor nuiscles 

 present. 



This is equivalent to section A of ()stergren"s Eaapt.a and includes 

 godeffroyl {^QmT[)Qv), lappa (J. Miiller), and /^<>//'/ (Ludwig). 



EUAPTA GODEFFROYI (Semper). 



Synapta godeffroyl iSEiMPER, lieiseii ein Archipel riiilipjiiuen, Pt. 2, I, Holothu- 



rien, 1868, p. 2.31, pi. xxxix, fig. 13 (Samoaii Islands). 

 Euapta godeffroyl Osteegken, Das System der Synai)tiden, Ofv. Ak. Forh., No. 2, 



1898, p. 11.3. 



Tentacles 14 to 16 (14 and 15 in Hawaiian examples) pinnate, with 

 about 56 to 70 digits united for about half their length by a thin web. 

 Deposits: Anchors with smooth arms and about six to eight minutely 

 spiny processes to handle of shaft; anchor plates with seven large 

 dentate holes and two large and three (or more) small smooth holes in 

 handle; the seventh hole acutely ovate and oidy partially dentate; 

 miliary rosettes subcircular with a hole in center. Anchors not 

 deformed in Hawaiian specimens. Color in alcohol, creamy white 

 with spaced broad bands of olive brown across the back and slightly 

 darker lines than sfeneral bodv tone along dorsal radii. The ground 



« A difference in the distribution of the serrations of these holes in Syimptula and 

 Euapta has been mentioned under Synaptula. 



