271 



Protankyra magnihamula n. sp. 



Hongkong. 1882. Suenson. 1 fragment. 



22° 10' N., 114° 30' E. 18 fms. 1882. Suenson. 2 fragments. 



There can be no doubt that the two fragments from 22° 10' N., 

 114° 30' E. belong to the same specimen, which then may be more 

 than 28 cm in length, as the two fragments measure 20 and 8 cm 

 in length. All the three fragments at hand are of the same width, 

 ca. 1 cm, and of the same brown colour. 



The fragment from Hongkong, the type, is a well preserved 

 fore-end, which measures ca. 5 cm in length. It has 12 tentacles, 

 each with four digits. Sensory cups are totally wanting. The radial 

 pieces of the calcareous ring are perforated for the nerves, and the 

 muscular impressions are very distinct. The tentacle-muscles are 

 tube-formed (Fig. 52. 6) with a narrow slit in the inner edge. They 

 are not fastened to the walls of the tentacles, but, by four small 

 projections, to the digits. Their proximal part is fastened to the 

 two sides of the anterior margin of the calcareous ring, the muscles 

 being astride on it (Fig. 52. 7). There are three very large and 

 20 small polian vesicles and a rather long stone-canal with a well 

 developed, hard madreporite. The gonads are voluminous and di- 

 chotomously branched. Oesophagus is rather thin and the intestine 

 is lacking. Ciliated funnels are found singly on the body-wall. They 

 are rather slender (Fig. 57. 8) and not united into clusters. 



The anchors are of different size. The smallest anchors measure 

 1100 — 1200 ft in length, the greater number of them measure 

 1300 — 1500 /4 and the largest anchor found measures ca. 1750 /f. 

 The anchors (Fig. 52. 2) are usually quite symmetrical, but some 

 few may be more or less asymmetrical (Fig. 52. 1). The arms are 

 regularly serrate (Fig. 52. 3) and the handle is finely branched (Fig. 

 52. 4-5). 



The anchor-plates (Fig. 51.3) are very regular in shape, being 

 nearly oval. The articulation with the anchors is developed as a 

 fine network, and the holes are distinctly toothed. 



The miliary granules (Fig. 52. 10) are found all over the skin; 

 they are very varying and measure from 10 — 25 fi in length. In 

 the tentacles there are found no rods but oval plates (Fig. 52. 9) 

 measuring ca. 20 ^ in length. 



Protankyra magnihamula is a well characterized species, easily 



