82 IOWA STUDIES IN NATURAL HISTORY 
this combination. The dorsal band is much interrupted in places. 
The form is flattened and attenuated to a mere thread at one end 
where there is an appearance of branching into several very slen- 
der filaments. On what I take to be the head end, its greatest 
diameter is about a quarter of an inch; here is a broad collar of 
the same chocolate brown as the dorsal band and at this end there 
is some indication of segmentation, although the body in general 
is smooth. Another nemertine is quite dark brown all over and 
probably two feet long. 
A small marine leech completes this hurried list of some of the 
more conspicuous worm-like forms from Makuluva; but the special- 
ist will doubtless find others of interest equal to those mentioned 
above. 
CQ@LENTERATA 
As would be expected, this phylum furnishes the great bulk of 
animals on and about the coral reefs, and I imagine that it would 
lead all others in actual number of species. 
Commencing with the aleyonarians, we noticed the absence of 
two of the three groups into which this order is usually divided. 
We found no representatives of the Pennatulacee nor of the 
Gorgonacee ; the Aleyonacex being the only one represented in our 
collection. The absence of sea pens, or Pennatulacee, is not re- 
markable as they are usually deep water forms; but the total lack 
of the flexible corals, or Gorgonacee, is much more noteworthy, 
especially to one accustomed to the multiplicity of these forms in 
the tropical Atlantic. 
One form very closely resembles Sarcophyton in general shape, 
being a good deal like a somewhat irregularly lobed mushroom. 
The stalk is thick and devoid of polyps while the head is much 
expanded to form a somewhat kidney-shaped mass on the upper 
surface of which the completely retractile polyps grow. There 
are no calyces, at least there is no evidence of them when the 
polyps are retracted. At first I could find no zooids, but they are 
evident under the low power of the compound microscope. The 
polyps themselves are of the ordinary aleyonarian type with eight 
fringed tentacles which do not close over the disk, and with small 
spicules. The general cenenchyma is a spongy mass with numer- 
ous, slender, spindle-shaped, warty spicules. There are two spec- 
imens of this form in the collection from Makuluva, which agree 
