520 NAINEREIS. 



in Laminarian roots at the Birnie Rocks near Grranton Quarry. They describe it l as 

 having an obtuse rounded head, and a pair of eyes; branchise commencing on the fifth 

 segment ; feet with a dorsal division of a single cylindrical process with a fascicle of long 

 capillary bristles in front, a ventral division consisting of a mammiform projection with a 

 nipple-like process at the end, on the anterior surface exteriorly a row of capillary setae, 

 proximally a large number of short thick setse, bifid at the apex (the latter being present 

 only in the first ten to fifteen segments). Amongst the dorsal bristles in the middle of the 

 body are some two-pronged. 



As the preparations made by the authors have disappeared, it is not possible to 

 re-investigate the subject at present. The form, described as Theodisca Mamittata, 

 appears to be a Nainereis. 



Nainereis, sp. 1. Plate LXXXV, figs. 10 and 10 a— bristles. 



A form which appears to be related to the above genus has more than once occurred 

 at St. Andrews, but the condition of the examples is such that no complete account 

 can at present be given, and since the bristles were drawn the preparation has been 

 mislaid. 



Habitat. — Tossed on shore at the West Sands after storms both in summer and 

 spring. It would appear, therefore, to reside in the sandy ground in the bay. 



Head somewhat flattened, bluntly conical. Body of considerable size, probably 6 

 to 8 ins. long, somewhat flattened dorsally and ventrally, rounded at the sides. It is 

 slightly narrowed anteriorly and more distinctly tapered posteriorly, where it terminates 

 in four short cirri. A median ridge occurs at the ventral surface. Claparede's form had 

 longest dorsal cirri at vent. A folded proboscis seems to have issued from the anterior 

 end, but it is injured. The segments are both narrow and numerous. Dorsally each 

 segment anteriorly has a long narrow bar with pointed ends, and behind it a ridge con- 

 necting the dorsal papillse of opposite feet. Ventrally each segment has three transverse 

 furrows or creases. 



Nainereis, sp. 2. Plate LXXXV, figs. 10 and 10 a— bristles; Plate LXXXVI, fig. 19— 



bristle. 



Specific Characters. — Head somewhat flattened, bluntly conical (from above). Eyes 

 unknown. Body rather large, flattened, slightly narrowed anteriorly. Ventral surface 

 with a median ridge. Segments narrow ; dorsally each has a narrow bar with pointed ends 

 in front, and behind it is a ridge connecting the dorsal papillge of opposite feet. Ventrally 

 each segment has three transverse furrows. Tenth foot has a prominent dorsal papilla 

 for the bristles, which are simple, golden, stout, and slightly curved. After an interval 

 a long elevated ridge represents the inferior division, and by-and-by this forms a flap 

 sloping backward, the dorsal papilla fusing with it superiorly. Ventral bristles have a 

 sharp hook at one side of the blunt tip, with a wing. At the ventral edge are long, simple 

 bristles with finely tapered tips. 



1 'Trans. Roy. Soc. Edin./ vol. xxxiii, pp. 642—643, 1888. 



