151 



Polyplectana longogranula n. sp. 



Hilo, Hawaii. IV. 1915. Rocky shore. 5 specimens. 



The beautifully preserved specimens at hand are by their general 

 appearance easily separated from the specimen of kefersteinii from 

 the same locality. They are long and slender and in contradistinct- 

 ion to the hard and stiff kefersteinii, they are very soft. The colour 

 is reddish-brown. The largest specimen measures 14 cm in length 

 by 0,6 cm in diameter and has 27 tentacles. The other specimens 

 are shorter and more slender and have but 25 tentacles. The tentac- 

 les are for ca. 2 mm length united at the base, by a membrane, 

 and on the distal two thirds they have ca. 20 pairs of digits. The 

 digits are free and not united by a web. On the oral disk there 

 are eye-spots. The cartilaginous ring is well developed and has 

 foramina close to the circular canal. The calcareous ring (Fig. 12. 2) 

 has distinct muscular-impressions wherefore it is rather like the 

 calcareous ring in oculata. There are many polian vesicles and a 

 single stone-canal. The madreporite is unusually long and elongated 

 along the stone-canal. The gonads are short and thick and bushy- 

 branched. The alimentary canal is not differentiated into oesophagus, 

 ventricle and intestine, but it has a large loop. The ciliated funnels 

 are of the usual size and shape and are found on the mesenteries 

 close to the body-wall. 



The anchors from the anterior end of body (Fig. 13. 6) measure 

 ca. 240 fi in length by 150 fi in width, and those from the posterior 

 end (Fig. 13. 5) measure ca. 265 ^ in length by 160 fi in width. 

 They have the stock finely toothed and on the vertex there are 

 minute knobs. The anchor-plates from the anterior end (Fig. 14. 1) 

 measure nearly the same as those from the posterior end (Fig. 14. 2), 

 ca. 200 ii in length by 150 fi in width. They are very alike, and 

 in both ends some of the articular holes are serrate on the anterior 

 margin and others are smooth. 



The miliary granules are, in the anterior end of the body, ca. 

 25 ^ long rods (Fig. 11. 2), irregularly shaped. The rods in the 

 posterior end of the body (Fig. 11. 1), are a little longer and have 

 usually the middle distinctly swollen. Beside the rods there are 

 oval plates. These are in this species rather small, measuring no 

 more than 8 — -12 ^ in length. In the tentacles and in the oral 

 disk no calcareous deposits are found. 



