10 G. LINDSTRÖM, ACTINOLOGY OF THE ATL: OCEAN. 
there seems to be a great discrepancy in the arrangement of the secondary and tertiary 
septa, which do not coalesce or unite in the previously known species. 
7. Paracyathus arcuatus n. 
P1. I, fig. 10—12. 
From the Josephine Bank in 110—112 fathoms; off Punta Delgada in 50—100 fms. 
Length 15 millimeters, breadth of calicle 5 millim. 
Turbinate, curved, basal apex free, narrow. Epitheca smooth, sometimes wan- 
ting or in detached zones. Coste narrow, finely punctuate, confluent with the septa 
near the calicle in a narrow line of zigzag. OCalicle circular with large borders, mo- 
derately deep. Septa not elevated, of six systems and five cycles. Paluli irregular, of 
variable size, columella of small crowded papillx. In a specimen from Punta Delgada 
the septa are more exsert, but else it seems to belong to the same species. There 
is a specimen with basal gemmation. 
8. Deltocyathus Agassizi PoURTALES. 
P1. I & II, fig. 13—20. 
POURTALES, Deep Sea Corals p. 15, pl. II, fig. 1—5, pl. V, fig. 9—10. — Hassler 
Exped. 'p. 35, pl. VI, fig.yll. 
? Sabinotrochus apertus DUNCAN, Madrep. p. 320, pl. 41, fig. 6—9. 
Trochocyathus Rawsomi PourtaLEs, Hassler Exp. p. 35, pl. VI, fig. 7—10 may perhaps 
also belong to this species, being provided with septa and columella of the 
same shape. 
This species has a very wide range, as now to its former known habitats can 
be added, that it has been dredged up by Dr Gois off Salt-Island in 200—300 fathoms 
and one specimen off Anguilla in 400 fathoms. During the expedition of the ”Josephine” 
it was collected by LJUNGMAN and SMITT in several specimens off Villa Franca in the 
Azores, in depths between 200—600 fathoms, and on the Josephine Bank in 110—120 
fathoms. 
This species is extremely variable, the varieties in the Westindian seas being 
almost the same as those off the shores of the old continents. In the Westindian seas 
the hexagonal form prevails with the apices of the six primary septa projecting, and 
it gradually passes into the variety calcar of PourTtALEsS, of which there is a specimen 
from Anguilla with spurs of 1,5 millim. in length, the diameter of the entire coral 
being only four wmillim. But generally there are 10 millim. between the spurs, the dia- 
meter proper being 8 millim. There is also a single Westindian specimen, quite cir- 
cular, without projecting primary septa, and broadly attached with its basis to a 
pebble. Such specimens, which were attached till a certain period and then became 
free, are almost the only ones found in the East Atlantic depths. Some show however 
a tendency towards the variety ”calear” in having the costw of different size, viz. six 
