146 



walled. The ciliated funnels are of the usual size and shape, and 

 are placed on the mesenteries close to the body-wall. 



The calcareous deposits are in the anterior end of the specimen 

 a little smaller than in the posterior end, and the anterior plates 

 have, as the plates in the anterior end of oculata, often the articular 

 ends more or less incompletely developed (cf. fig. 14. 11 — 13 of 

 oculata). It is interesting to see that not few of the anchors from 

 the anterior end have three arms. The third arm is found on the 

 vertex and the knobs are then either wanting or found somewhat 

 to the one side. The normally shaped anchors from the anterior 

 end of body (Fig. 13. 10) measure ca. 260 fi in length by ca. 150 

 fjb in width. The stock is rather irregularly shaped, but never 

 branched, and on the vertex there are some few minute knobs. 

 The anchor-plates from the anterior end (Fig. 14. 8) measure ca. 

 220 f.i in length by ca. 150 ^ in width. The six large holes in 

 the anterior end of the plates are distinctly serrate, but the seventh, 

 the "articular hole" is usually smooth, though some few teeth may 

 be found on its anterior margin. The side-holes in the articular end 

 are large and the bridge is uniformly serrate on its anterior side. 



The anchors from the posterior end (Fig. 13. 9) measure ca. 

 280 fi in length by 170 ^ in width. Their stock is more regular 

 than in the anchors from the anterior end, and on the vertex 

 there are a few more, minute knobs. The anchor-plates (Fig. 14. 7) 

 measure in this end of the specimen ca. 220 fi in length, but 

 their width is usually a little larger than in the anterior plates, 

 ca. 170 fi. The serration of the holes and the bridge is quite as 

 in the normal plates from the^anterior end. 



Beside the anchors and anchor-plates there are found miliary 

 granules and oval plates. The miliary granules (Fig. 11. 9-10) are 

 irregularly shaped bodies, which measure from 8 ^ to 15 [i in 

 length. They are found as a dense coat all over the posterior end, 

 but very scattered in the anterior end. The oval plates are found 

 in the longitudinal muscles. In the tentacles there are found no 

 calcareous deposits. 



P. kefersteinii is characterized especially by the shape of the 

 calcareous ring and the miliary granules, but also in the other 

 characters it differs from the other species of the genus. It is known 

 with certainty only from Hawaii. The many specimens of Polyplectana 



