— 464 — 



tlie description given by Pourtalès is very insufficienl for piu'poses of com- 

 parison. Moreover the Paris jMuseum spécimens are considerably broken 

 up and it is quite impossible to fonn an accurate idea of tbe size and 

 sbape of tbe wboie colony. So far as tbe original description of tbe eolony 

 goes boAvever tbe identification appears to be correct , and it is confirmed 

 by the fact tbat tbe type Avas found in tbe same locality (tbe Azores). 



Tbe folloAAing is tbe description given by Pourtalès : 



ffTbe Fayal spécimens form large flabelliform expansions of great élé- 

 gance, resembling Stylaster Jlahclliformis. Tbe species is neariy aliied to 

 Lepidopora ghhra from wbicb it difïers by its more crowded brancblets , 

 larger and more numerous tubercles, not confined to tbe sides of tbe 

 branches , and rough cœnencbyma. The spread of tbe corallum is neariy 

 a fool.î! 



Tbe foUoAAing description appbes to tbe Talisman spécimens. 



Golony profusely brancbed, probabiy flabelliform in growtb. Branches 

 do not anastomose. Terminal branches délicate and pointed, at a distance 

 of 3 mm. from the apex, about 1,26 mm. in diameter. Gasteropores mainly 

 on one surface of the corallum and about 1,70 in diameter, usually over- 

 hung by a scale. Grooved spines prominent , numerous , sometimes in cius- 

 ters on tbe terminal branches, with tbe groove turned away from the 

 apex. In addition to the grooved spines protecting the dactylopores other 

 spines are présent particularly on the posterior surface. 



Surface of the cœnenchym minutely granular and substance minutely 

 reticulate. 



Colour pure white. 



Locabties : Expe'dition du Talisman. Dragage 128. 56o mètres, Fayal, 

 and 56 mètres, Açores. 



Errina atlantica new sp. 



Tbis species bas some resemblance to tbe Lepidopora ghhra of Pourtalès , 

 but difïers from it in tbe absence of scales protecting tbe gasteropores. 



Tbe two outstanding features of tbe species are: firstly the relatively 

 small number of pores and secondly tbe tendency for thèse pores to be 

 arranged rougbly in rows at or near the sides of the branches as in the 

 genus Dislichopora. There is no complète spécimen in tbe collection and 

 of tbe pièces tbat are preserved the terminal branches are mostly broken 

 ofif and losl. Tbe description is therefore to some extent incomplète : 



Hydrophytum not very profusely ramifîed nor flabelliform in groAvth. 

 Terminal branches usually (?) blunt, about 2 mm. in diameter at a distance 

 of 3 mm. from the apex. Secondary branches o-k mm . in diameter. 



Surface minutely granular, not marked by longitudinal striae , substance 

 compact. Gasteropores not protected by scales nor lips, about o,3 mm. in 



