BIOLOGICAL, SURVEY OF WOODS HOLE AND VICINITY. 
5 8l 
Polychaerus caudatus Mark. 
Mark, 1892 p. 298; Verrill, 1892b, p. 511; Gar- 
diner, 1895, p. 155; Bumpus, 1898 b, p. 856: 
Graff, 1911, p. 326. 
Woods Hole Harbor, Hadley Harbor. — Mark. 
Newport, Woods Hole; found “especially in 
sheltered harbors, adhering to eelgrass ( Zos - 
tera ) and creeping over the vegetable debris, 
shells, etc., on the bottom in shallow water, 
where it is often extremely abundant.” — 
Verrill. “Northwest Gutter,” near Hadley 
Harbor.— Gardiner. On Ulva in Little Harbor 
Polychaerus caudatus — Continued. 
and eelgrass in front of Breakwater Hotel. — 
Graff. 
Mark records finding egg-capsules of this species 
on dead shells and stones in Woods Hole 
Harbor. J. P. McMurrich (in Marine Biologi- 
cal Laboratory card catalogue) notes their 
presencg on Pecten shells, July 15 (1890). 
E. G. Gardiner (cited by Bumpus) found the 
eggs from June 6 to August 25, and noted that 
“the eggs are deposited at night in transparent 
gelatinous capsules.” 
The paper of Graff (1911), recording a considerable number of turbellarians, many of them new to 
science, which were taken at Woods Hole and vicinity, appeared too late to allow of our including Graff’s 
list except as an appendix to our own. These added species are accordingly arranged serially, without 
relation to those previously listed. One of them, Graffilla gemellipara, had been described by 
Dr. Linton in 1910. 
Anaperus gardineri Graff. 
1911, p. 327 (sp. nov.). 
In beds of Ulna and eel-grass, burrowing in the 
sand; taken with Polychaerus caudatus, but far 
less common. 
Childia spinosa Graff. 
1911, p. 341 (sp. nov.). 
Juniper (Butlers) Point, in % to 1 fathom of water, 
on Laminaria; Little Harbor, at ebb tide, on 
Ulva; about a dozen specimens taken. 
t Stenostomum coluber Leydig. 
I 9 IX , P- 348. 
Doubtfully identified by Graff among material 
taken by Child and Wilhelmi from a brackish 
pond at Falmouth, under stones. 
Microstomum davenporti Graff. 
1911, p. 349 (sp. nov.). 
Eel Pond and breakwater, on Ulva. 
Prorhynchus stagnalis Schultze. 
1911, p. 351. 
Brackish ponds at Falmouth, under stones; a 
number taken by Graff. 
Graffilla gemellipara Linton. 
Linton, 1910, p. 371 (sp. nov.); Graff, 1911, p. 
351; Patterson, 1912, p. 173. 
Discovered by Linton at Woods Hole, in the 
ribbed mussel Modiolus demissus, from the 
gills of which the parasites were washed. 
According to Linton, this species is especially 
numerous in mussels exposed to rather free 
tidal currents, being absent from those taken 
in confined coves. Patterson finds evidence 
that the parasite inhabits the kidneys of the 
host, rather than the gills. He has taken it in 
abundance during the latter part of June and 
the latter part of August, finding it to be rare 
in the intermediate period. 
Dalyellia dodgei Graff. 
I 9 II > P- 354 (sp- nov.). 
This and the two following species were taken by 
Graff in the brackish pond behind the Episco- 
pal Church at Falmouth. 
Dalyellia rossi Graff. 
I 9 II > P- 359 ( S P. nov.). 
Dalyellia mohicana Graff. 
1911, p. 362 (sp. nov.). 
Proxenete r modestus Graff. 
I9 XI > P- 374 (sp- nov.). 
Eel Pond, 5 specimens found by Graff. 
Promesostoma marmoratum nudum Graff. 
I 9 II > P- 375 ( var - nov.). 
Woods Hole, on Ulva, 3 specimens. 
Trigonostomum marki Graff. 
1911, p. 380 (sp. nov.). 
Little Harbor, on Ulva; Red Ledge, among 
Zostera; several specimens. 
Woodsholia lilliei Graff . 
1911, p. 381 (sp. nov.). 
Woods Hole, very common, being taken in Eel 
Pond, Little Harbor, Grassy Island, and Red 
Ledge, on Zostera. 
Phonorhynchus helgolandicus (Meczn.). 
1911, p. 385. 
Eel Pond, Grassy Island, Red Ledge, Juniper 
(Butlers) Point; one of the commonest species. 
Gyratrix hermaphroditus maculata Graff. 
1911, p. 388 (var. nov.). 
Woods Hole, in salt marsh near Gardiner cottage. 
