BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



581 



Polychcerus caudatus Mark. 



Mark, 1892 p. 298; Verrill, 18925, 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 



Polychcerus 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 

 presence 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." 



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. 



1911, 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. 



P- 359 ( S P- nov.). 



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 Ulva and eel-grass, burrowing in the 

 sand; taken with Polychcerus caudatus, but far 

 less common. 



Childia spinosa Graff. 

 1911, p. 341 (sp. nov.). 

 Juniper (Butlers) Point, in % to i fathom of water, 



on Laminaria; Little Harbor, at ebb tide, on 



Ulva; about a dozen specimens taken. 

 tStenostomum coluber Leydig. 

 1911, p. 348. 

 Doubtfully identified by Graff among material 



taken by Child and Wilhelmi from a brackish 



pond at Falmouth, under stones. 



Alicrostomum davenporti Graff. 

 1911, p. 349 (sp- nov.). 

 Eel Pond and breakwater, on Ulva. 



Prorhynchus stagnalis Schultze. 



I9 11 - P- 35 1 - 



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 



Dalyellia mohicana Graff. 

 1911, p. 362 (sp. nov.). 



Proxenetes modestus Graff. 



1911, p. 374 (sp. nov.). 



Eel Pond, 5 specimens found by Graff. 



Promesostoma marmoratum nudum Graff. 

 1911, 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. 



Gyrairir. hermaphroditus maculata Graff. 

 1911, p. 388 (var. nov.). 

 Woods Hole, in salt marsh near Gardiner cottage. 



