REPOET OX THE HOLOTHUEIOIDEA. 
25 
(“Porcupine” Expedition). Three specimens from Station 35, July 26, 1869; depth, 96 
fathoms. 
(Mus. Holm.) Several specimens of VerrilTs Leptosyna'pta girardii dredged at 
Xewport. The miliary granules resemble minute curved or straight rods with 
one or both ends enlarged ; sometimes they even have the shape of very incom- 
plete rosettes. 
Synapta gracilis, Selenka, 1867. 
Tentacles with ten to twelve digits. Cartilaginous ring none. A single Polian 
vesicle and madreporic canal. In young individuals the anchors and plates are 
opaque and consist of arragonite crystals. In older forms the deposits always- 
present a distinct roughness, but the arms of the anchors are transparent and 
dentate. The holes of the plates are minutely dentate. Tentacles without 
calcareous rods in the walls. 
Hahitat . — Massachusetts Bay (Selenka). 
This species seems very doubtful Selenka’s figures give the impression of being- 
drawn from deposits in a state of dissolution. Doubtless it is identical with the 
preceding species, to which the deposits bear a certain resemblance. Miliary 
granules unknown. 
Synapta roseola [LeptosynapAa), Yerrill, 1874. 
Hahitat . — Long Island Sound and Vineyard Sound (Verrill), Provincetown and Cape 
Cod (Rathbun). 
The species differs from Synapta inlicerens mainly by the colour being rosy or pale red, 
due to minute red spots. Is doubtless not a distinct species. 
Synapta alhicayis, Selenka, 1867. 
Tentacles with about twenty-one digits. Cartilaginous ring absent. A single 
Polian vesicle and madreporic canal. Anchor-arms dentate. Anchor-plates 
with the usual number (seven) of large dentate holes and several almost 
smooth ones. Tentacles with numerous rods. Intestinal canal without 
circumvolutions (?). 
Hahitat . — Mendocino in California (Selenka). 
Even this species seems not to be well defined. Miliary granules unknown. 
Synapta ooplax, von Marenzeller, 1881. 
Tentacles with nine, seldom eleven digits. Cartilaginous ring none. A single Polian 
vesicle and madreporic canal. Anchor-arms with two to three serrations. 
Anchor-plates ovate, with almost smooth margin, and with holes either smooth 
or dentate, kliliary granules present on the ambulacra — oval disciform vith 
or without a central opening or slightly curved. 
Hahitat . — Japan or China (v. Marenzeller). 
(ZOOL. CHALL. EXP. PART XXXIX. 1885 .) ^9 ^ 
