214 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
in shape; the denticles are small and very numerous; some of the pharyngeal glands open on conspicuous 
papilla* on the sides of the jaws. To this the color pattern as described by Blanchard for Pcecilobdella 
will probably need to be added. 
Hirudinaria blanchardi, sp. nov. 
Diagnosis . — Genital pores separated by five annuli, the male being situated at xi&5/6, the female 
at xii&5/6. Annulation as in II. javanica (Wahlberg) Whitman, except that xxiv65 and 56 and xxvbl 
and 12 are developed (that is, the annuli numbered 95 and 96 in Whitman’s figure (’86, pi. xx, fig. 56) 
are in the present species each represented by two partially separated rings). 
Named for Prof. Raphael Blanchard, of Paris. 
External characters . — All of the examples are very much contracted. The type specimen, which 
is of medium size, measures as follows: Length, 39 mm.; greatest width (xvm or xix), 11 mm.; depth 
at same point, 5.6 mm.; diameter of mouth at base of upper lip, 2.5 mm.; diameter of sucker, 6 mm. 
The species reaches a much larger size, probably equaling our Macrobdella decora. The largest example 
is 64 mm. long and its greatest width is 18.5 mm., but most of those in this collection are much smaller, 
being from 15 mm. to 25 mm. long. 
Owing chiefly to their contracted state the larger examples are short and thick, slightly depressed 
behind but becoming more and more terete toward the mouth. The greatest width occurs at the 
beginning of the posterior third, in which region the dorsal surface is much more convex than the 
ventral, as indicated in fig. 4, plate 12, by the greater distance m dm than in vm. A strong annular 
contraction occurs in all the smaller examples at about somites vm and ix, resulting in the appearance 
of a short rounded head united by a neck to the body, which is of a flattened, narrow, elliptical form. 
The lips and margins of the mouth are so much contracted that the folds which lie anterior to the jaws, 
and in some examples even the jaws themselves, are plainly visible. This would indicate that under 
normal conditions the mouth is of large size, as in II. javanica. No distinct clitellum is indicated. 
There are 104 annuli, beginning with the prostomium and ending with the postanal annulus at 
the base of the acetabulum (pi. 12, figs. 2 and 3). Owing to contraction they become very short and 
crowded at the posterior end, but much less so anteriorly. The annuli are marked off into quadrate 
areas, each of which contains one or more pointed papillae and very numerous smaller sense organs 
(pi. 12, fig. 4). The larger papillae become very prominent posteriorly and at the margins of the 
body. Some further details are added below in connection with a description of the annulation and 
rnetamerie sensillae. 
The broad upper lip consists of the preocular region, here counted as one somite and one annulus, 
together with the first three eye-bearing annuli and the fifth annulus (pi. 12, figs. 1 and 2). Like the 
remainder of the body, this region is roughened by numerous non-segmental papillae. A deep longi- 
tudinal median sulcus (pi. 12, fig. 1) divides the lower surface of the lip, as in Limnatis, into equal 
halves. Posteriorly this sulcus widens into a triangular depressed area from which the median jaw 
rises. On each half of the lip are about three less deep sulci about equidistant and extending parallel 
to the median one. Between these the lip is nearly smooth, but is studded with numerous minute sense 
organs, which are especially plentiful near the anterior margin. The mouth is bounded posteriorly 
by the coalesced sixth and seventh annuli (pi. 12, fig. 1). 
A full somite separates the sex pores, the male being situated at xi65/6, the female between the 
corresponding annuli of xii. Both of these orifices are inconspicuous and not indicated by any eleva- 
tions, glandular areas, or pits. The male pore is somewhat the larger, but in no case does the penis 
protrude. No clitellum is visible even on the largest specimens. Nephridiopores are found in the 
position and number usual in the family (pi. 12, fig. 4, np . ). They are placed exactly on the inner 
margin of the ventral black band. 
The posterior sucker (pi. 12, fig. 3) , like the posterior region generally, is much contracted, but still 
large. Its anterior margin reaches as far forward as somite xxm, so that when relaxed it would probably 
bave the size and proportions of the corresponding part in II. javanica. Dorsally it is marked by six 
or eight irregular transverse wrinkles, and is somewhat roughened and bears papillae, as in the body 
annuli. Numerous elongated sensillae are also found here, but they vary much in number, size, and 
position in different individuals. Ventrally, the sucker in its contracted state is .more or less funnel- 
form, with a deep central depression and sloping sides which are marked by numerous faint radiating 
furrows. The anus is of small size and is situated between somite xxvri and the base of the sucker. 
