ANNOTATED LIST. 161 
Leptosynapta latipatina! sp. nov. 
(Plate 36, Figure 12.) 
Anterior end, including tentacles, calcareous ring, polian vessel, etc., wanting. 
Calcareous particles, anchors, plates and miliary granules as in other members of the 
genus, but essentially alike at both ends of the animal and quite uniform in size 
and proportions. 
Anchors (pl. 36, fig. 12a) 0.135 to 0.168 mm. long, averaging about 0.150; the vertex 
is flattened, and the flukes bend down rather abruptly, tending to be parallel with the 
shaft; the width across the flukes at their tips is about 0.060 mm. and their length is about 
one-fourth that of the anchor as a whole; the flukes are often smooth, but when fully 
developed have 3 to 5 small teeth near the tip; the stock is uniformly convex and rather 
coarsely toothed distally, but nearly straight next to the shaft. 
Plates (pl. 36, fig. 126) broadly oval, 0.122 to 0.126 mm. long, averaging about 0.125; 
they are about 0.090 mm. wide where broadest, just distal to middle. They have the 
usual large, toothed and small, smooth perforations; the bridge seems to be a little higher 
and less fused with the plate itself than in some related species, but on the whole there is 
little that is distinctive about the plates. 
Miliary granules (pl. 36, fig. 12c) are confined to the longitudinal muscles where they 
are fairly numerous. They are 0.015 to 0.030 mm. long and for the most part C-shaped 
with thickened ends, but they vary greatly in relative length and thickness of the different 
parts; at one extreme are nearly straight rods with enlarged and perforated ends (some- 
times several perforations in each end), while at the other are doughnut-shaped bodies, 
apparently formed by the union of the two ends of the C. Rarely they are more or 
less branched. 
Color.—In life, translucent white, with numerous minute spots of pinkish; in alcohol, 
pale pink with numerous minute spots of reddish. Examination under the microscope 
shows that the spots are very small verruce crowded with pigment; of course, the number 
per square millimeter and the relative position of these verrucz depend upon the amount 
of contraction of the body-wall, and therefore the animal is most deeply colored where 
most contracted and palest where most relaxed. 
The larger of the two fragments on which this species is based is, in alcohol, about 
80 mm. long and 3 to 4 mm. in diameter. In life the animal was evidently more than 
100 mm. long and relatively slender; my field-notes say ‘‘4 inches” but this obviously 
applies only to the portion collected; how much is lacking is unknown. 
Holotype, M. C. Z. No. 990; in sand, under a rock fragment, on flat southwest of 
Friday Island, Torres Strait. 
When this specimen was taken, it was supposed to be complete but with the tentacles 
fully contracted. Later examination in the laboratory revealed its damaged condition and 
it was my hope and expectation that further collecting where it was found would furnish 
perfect individuals. But a sudden change in our plans took us out to the Murray Islands, 
and I never again set foot on the sand flat southwest of Friday Island. 
This synaptid is clearly very near to both inherens and dolabrifera, especially the 
latter. Joshua (1914) says, in connection with the Australian species: ‘‘There is no doubt 
in my mind that if dolabrifera was collected at a locality north of the equator, it would be 
identified without hesitation as inherens.”’ Probably a superficial examination would lead 
to such a blunder, but any careful study shows such well-marked and constant differences 
in the form of the anchors and plates and the calcareous particles of the longitudinal 
muscles, in the number of polian vesicles, and in the calcareous ring, that there is no reason 
to doubt their specific distinctness. There are numerous genera, not only of holothurians 
1 Latus =broad + patina =a small plate, in reference to the relatively wide anchor-plates. 
