HYDROCORALLINE GENUS ERRINA. 009 



in my collection in the species Errina [L.) novce zelandice, but, 

 on comparing it with the sjDecimens in the British Museum, I 

 came to the conclusion that it is probably related more closely to 

 Errina (L.) aspera. It is moderately branched and roughly flabelli- 

 form in growth. The terminal branches are fairly thick, being 

 about 2-2*25 mm. at a distance of 3 mm. from the apex. The 

 branches do not anastomose. 



The surface and substance of the coenosteum are minutely 

 granular. 



The grooved spines are very crowded and clustered on the 

 terminal branches, and not arranged in rows (fig. 6). The 

 grooves are turned in all directions, but the majority of them 

 away from the apex of the branch. 



The gasteropores are equally distributed on both sides of the 

 flabellum, and are without any lip or collar. Size 0'13-0'17 mm. 

 in diameter. 



The large dactylopores are very variable in size, '09 x "09 mm. 

 to -06 X 0-11 mm. 



The small dactylojjores are very numerous, 0*06 mm. in 

 diameter, and provided with small curved lips. 



The specimen is like the type in being white in colour. 



Mr. Morgan's sj^ecimen diifers from the type in having rather 

 m.ore slender branches, in having the pores equally distributed 

 on the two surfaces of the flabellum, and in the presence of 

 numerous small dactylopores. 



Errina (Labiopora) gracilis von Marenzeller. 



Several specimens of this species were found by the ' Belgica ' 

 Expedition attached to the swabs when dredging off the pack ice 

 in the region of 71° S. and 88° W., i.e. about 20 degrees west 

 and 15 degrees south of the Straits of Magellan. The depth 

 is not recorded by von Marenzeller, but it is probably between 

 500 and 600 metres. 



The hydrophytum is flabellate in growth, with well-marked 

 anterior and posterior surfaces. One of the specimens, which 

 proved to be a female, was 25 mm. in height and 30 mm. in width. 

 Another, which proved to be a male, was 100 mm. by 140 mm. 



The surface of the coenosteum is finely wrinkled, and marked 

 with transverse and longitudinal ridges {Kammschen). There are 

 apparently no well-marked coenosteal pores. 



Grooved spines not arranged in definite rows, but in irregular 

 clusters or singly. The grooves of the grooved spines turned 

 away from the apex of the branches or sideways. 



Gasteropores with a lip, '015 mm. in width. 



Large dactylopores sheltered by spinous projections provided 

 with a deep groove. 



Small dactylopores with or without a lip. 



Colour : white or brownish. 



There can be little doubt that this species belongs to the 



