DEPARTMENT OF MARINE BIOLOGY. 215 



Of the smaller Leodicidse, L. stigmatura of Verrill was the most abundant, 

 occurring practically everywhere in tubes on the undersides of stones. I did 

 not find L. tenuicirrata of Verrill, and am not clear as to its distinction from 

 stigmatura. Some specimens of the latter species answered very closely to 

 Verrill's description of tenuicirrata. L. unifrons was collected, but was not 

 so abundant as stigmatura. 



From under stones in Flatt's Inlet were collected considerable numbers 

 of L. articulata of Ehlers. Verrill described L. margaritacea from this locality, 

 but his species is evidently synonymous with Ehler's articulata. It is possible, 

 also, that his L. elegans should be referred to this same species. L. denticulata 

 of Webster, which, as Verrill has stated, is synonymous with L. conglomerans 

 of Ehlers, was abundant on the underside of stones in membranous tubes. 

 At the Tortugas this occurs only in sponges and grows to a much larger size 

 than any that were seen in Bermuda. This may be a distinct subspecies 

 from that found in the Tortugas. 



What was probably L. filamentosa of Grube was collected in small numbers 

 in mud at the southern end of Tuckerstown Bay, and a single specimen of 

 L. hinominata Verrill was found in Tucker's Bay. A few L. culehra Treadwell 

 occurred in porous rock in association with Nicidion kinhergii Webster. As 

 is the case in the Tortugas, this latter species is common in the porous outer 

 layer of the rocks, a few specimens of Lysidice hilohata Verrill occurring 

 with it. 



Three species of Marphysa were collected. The most abundant species, 

 occurring everywhere in the loosely compacted limestone rock, was M. regalis 

 of Verrill. Verrill's description of this species did not include the coloration 

 of the hving animal, which is most striking, and on finding it in the Tortugas, 

 I was misled into giving it a new specific name, fragilis. This is clearly 

 synonymous with regalis, the latter name having priority. Marphysa 

 acicidorum of Webster was abundant in muddy bays, and occurred also in 

 porous rocks at the entrance to Flatt's Inlet. Associated with it in Ely's 

 Harbor and at Fairyland Creek was another form, probably a distinct species. 

 The two are quite similar, but whereas in M. aciculorum the gills are slender, 

 arising from a comparatively short stem, the gills of the other species have a 

 heavy tapering stem with a diminishing series of filaments along the side. 

 The head has also a greenish tinge not found in aciculorum. Further study 

 is necessary to establish its identity. 



Stauronereis melanops of Verrill and S. vittata of Grube occurred very 

 rarely. S. rubra of Grube, fairly abundant at the Tortugas, did not appear 

 in my collections. Aglaurides diphyllidia of Schmarda was fairly common. 



Specimens of Lumbrinereis and Arabella were common in all muddy and 

 sandy places, but as surface markings are of httle importance in distinguish- 

 ing the species of these genera, further study is necessary before making any 

 statement concerning them. One Lumbrinereis, which I shall describe as a 

 new species under the name L. cingidata, was fairly common in Bermuda. 

 Only three specimens have been found in the Tortugas, and these were dredged 

 in 15 fathoms south of Loggerhead Key. It is unusually small, the type 

 measuring 60 mm. in length, with 60 somites. It is nearly colorless, but 

 has brown transverse bands on the anterior somites and brown patches on 

 the head. The surface is thickly studded with minute tubercles, visible 

 under rather high magnification. At Bermuda it was collected in the porous 

 surface-rock in several localities, while the type, from Fairyland Creek, was 

 found in a sponge. 



