243 



specifically different from it. The ciliated funnels are found on the 

 body-wall. They are of very nearly the same shape as the funnels in 

 ooplax. The gonads are voluminous and several times branched. The 

 genital duct opens on a rather long papilla between the dorsal tentacles. 



The anchors from the posterior end of body are very like those 

 from the posterior end of ooplax only they are a little shorter 

 and thicker. They measure ca. 145 fi in length and 60 // in width. 

 The anchors from the anterior end of body (Fig. 42. 7) measure 

 ca, 145 p in length and 80 /i in width. They are usually a little 

 asymmetrical, as the arms may be of different length. The anchor- 

 plates from the anterior end of body (Fig. 42. 8) differ from the 

 corresponding plates in ooplax, in being not hollowed in the arti- 

 cular end and in having but 7 — 9 holes through their anterior end. 

 The holes of these plates are usually quite smooth, but some few 

 and faint teeth may occur. The anchor-plates from the posterior 

 end of body (Fig. 42. 6) are more regularly rounded than in ooplax. 

 The larger part of the holes are smooth, but a single one may be 

 more or less toothed. 



There is but one sort of miliary granules in the body (Fig. 41. 3). 

 They are of varying shape and usually confined to the ambulacra. 

 The rods in the digits (Fig. 41. 2) are different from those in the 

 tentacle-base (Fig. 41. 4). They are not branched but they have 

 very often two holes in the enlarged ends. 



This species is closely related to ooplax v. Marenzeller, but it 

 differs in the shape of the calcareous deposits so much from that 

 species, that I have no doubt in regarding it as a valid species. 



Eupatinapta n. g. 



Genotype: Synapta acanthia Clark. 



Diagnosis: Tentacle pinnate, usually twelve. Sense organs 

 never in the form of pigment-eyes, but occur as sensory cups on 

 the oral side of the tentacles. Calcareous ring well developed and 

 the radial pieces perforated for the nerves. Cartilaginous ring want- 

 ing. Polian vesicles few; stone-canal single and unbranched. 

 Stock of anchors not branched but finely toothed. Anchor-arms 

 more or less serrate and vertex smooth. The anchors from posterior 

 end of body are of different size and shape, the larger ones being 

 distinctly different from those in the anterior end of body. The 



16* 



