38 PBOF. A. DENDT ON THE 



plates or scales (PI. 4. figs. 35, 36), measuring up to about 1 mru. 

 in diameter, and varying from oval to roundedly triangular in 

 outline. In addition to these, there are small reticulate cups 

 (PL 4. figs. 41-43), of the same fundamental form as in G. alia, 

 but much larger and with the marginal projections represented 

 merely by blunt warts. These cups measure about 0"054 mm. 

 in diameter. Perforated rods (PI. 4. figs. 37-40) occur. 



The type specimen, from which the anatomical details were 

 taken, measured about 53 mm. in length (exclusive of tentacles). 

 Another specimen from the same locality (New Brighton) was of 

 about the same size, but the tail portion was longer and narrower, 

 apparently less contracted. Two more specimens, belonging 

 to the Christchurch Museum, and o£ unknown locality, were 

 respectively rather more and rather less than twice as long as 

 the type, and thick in proportion. 



One of the two larger specimens was also dissected and 

 exhibited a peculiar abnormality in the tentacles, two dorsal 

 being the smallest instead of the two ventral, which latter 

 VFere well developed. The left dorsal retractor muscle was also 

 found tc be disconnected from the calcareous ring, so that its 

 anterior end projected freely into the body-cavity. It looked as 

 though it had been ruptured and the ruptured end had healed 

 up. Possibly the degeneration of the dorsal tentacles is to be 

 connected with the injury to this muscle. All the tentacles, 

 however, were completely retracted. 



It is not easy to convey in writing an adequate idea of the 

 distinction between this species and the preceding. Both species 

 are remarkable for their scaly armature. It is very interesting 

 to find in two closely allied species from such near locaHties a 

 slight difference in external characters accompanied by a slight 

 but well-marked difference in spiculation. 



COLOCHIEUS CALCAEEA, U. Sp. (PI. 5. figS. 44-53.) 



Animal minute. Body short, sausage-shaped, bluntly rounded 

 at both ends and without dorsal flexure. Colour chalky white 

 in life and in spirit. Tentacles dendriform, ten in number, the 

 two ventral much smaller than the eight others; pale yellow 

 in colour. Tube-feet in almost or quite simple series on the 

 three ventral ambulacra. Papillae on the dorsal surface, chiefly 

 in two rows, sparse, moveable and retractile, each sometimes 



