[95 | ALBATROSS EXPLORATIONS. 597 
bers, with the Periphyllide. Its coronal furrow and seulpturing of the 
exumbrella recalls the former family, and the arrangement of the ten- 
tacles in threes and other features, the latter. Heckel rightly says of 
Nauphanta that, like Atolla, ‘itis a true deep-sea form of high phylo- 
genetic antiquity.” The allied Nauphantopsis supports Heckel’s inter- 
pretation of the relationship of the Peromedusz and the Collaspide. 
Ephyroides rotaformis Fewkes, gen. et sp. Dov. 
A new genus, Ephyroides, has rounded elevations, from sixteen to thirty- 
two in number, on the exumbral side of the corona of the bell. Itis a 
member of the Ephyridz of Heckel, and occurs at the following stations: 


a Locality— 
3 Depth. 
s N. lat. W. long. 
mn 
OMe jehaaeale! Fathoms. 
2042 | 39 33 00 68 26 45 1, 555 
2044 | 40 00 30 68 37 20 1, 067 
2051 | 39 41 00 69 20 20 1, 106 
2047 | 40 02 30 68 49 40 389 
Periphylla hyacinthina Steenstrup. 
The Periphyllide are represented by a fine suite of specimens of the 
medusa, Periphylla hyacinthina Steenstrup, and another species which 
may turn out to be anew genus closely allied to the latter. From these 
meduse, of which there are fifteen specimens, I shall be able to study 
at length the development of the genus Periphylla, of which at present 
nothing is known. 
Halicreas minimum Fewkes. 
In 1880-81 the “Albatross” collected a strange medusa, to which was 
given (Bull. Mus. Comp. Zool., vol. ix, No. 8) the name Halicreas min- 
imum Fewkes. In the present collection this genus is represented by 
several specimens. The genus is a marked one, by the possession of 
eight prominences on the margin of the umbrella, from which radial ribs 
extend toward the center of the disk. These radial prominences bear 
two or more rows of small rounded tubercles. The velum is similar to 
that of Solmaris, Cunina and certain Narcomeduse. It has eight 
rounded knobs on the subumbral surface of the disk, as in the young 
Zygodactyla Grenlandica. The specimens of this genus in the collection 
willenable meto make out a good anatomy of this extraordinary medusa. 
They come from the following stations : 






a Locality— 
z x Depth 
8 N. lat. W. long. 
mM 
io) yee GE 1G Fathoms. 
2034 | 39 27 10 69 56 20 1, 346 
2036 | 38 52 40 69 24 40 1, 735 
2039 | 38 19 26 68 20 20 2, 369 
2041 | 39 22 50 68 25 00 | 1, 608 
| 2042 | 39 33 00 68 26 45 | 1, 555 | 
| 2216 39 47 00 70 30 30 963 
