Gutty Marine Laboratory^ St. Andrews. 175 



moou-sliaped. Tliey are smaller than those of S. limicola, 

 and the pairs on each side nearer each otlier. The ])alpi are 

 very long and slender. The first pair of feet and the parts 

 amalgamated with them agree with the tyjncal form. 



The body is slender and elongated, tapering to the vent on 

 the tip of the tail dorsally. The only complete example had 

 about 80 bristled segments, and in spirit measured an incii 

 and a half. The feet are prominent, but the nephridial 

 eminence is indistinct and devoid of a ])apilla. The scales 

 are thin, someuhat translucent, and entirely cover the dorsum 

 — indeed, they overlap considerably. The first pair are small, 

 ovate in outline, and have the margin surrounded by a series 

 of short clavate cilia, while the surface is studded with small 

 conical pajiilhe. The typical scale (PI. III. fig. 5) is more 

 or less reniform, and, with the exception of the anterior 

 portion of the inner border and the anterior margin, the 

 circumference has a close series of clavate cilia, which are 

 largest on the external border and diminish before disappearing 

 from the inner edge. The entire surface of the scale is dotted 

 with the minute conical papillaj. Posteriorly the chief changes 

 are the diminution in the size of the scale, its shorter and 

 broader reniform outline, its greater translucency, the reduc- 

 tion in number and size of the cilia on the external and poste- 

 rior border, and the paucity of the conical papillaj on the 

 surface. The scales thus differ from those of known species. 



The first foot has a single spine, and bears the dense tufts 

 of bristles conforming to the dorsal type, but somewhat 

 stronger than those of the typical foot. The second foot has 

 curved dorsal bristles springing from a division a little less 

 prominent than the ventral, and with several lobulated papillge 

 (" stylodcs," Vruvot and Racovitza) at its tip, each bristled with 

 stout clavate cilia. The ventral lobe is massive, with several 

 blunt clavate papilla?.. The upper bristles have numerous 

 rows of spines on the convexity at the end of the shaft, and 

 long, slender, six- or seven-jointed distal pieces with a 

 minutely bifid tip, such bristles thus conforming to the inferior 

 ventral series in the typical foot. The stronger bristles in 

 the middle of the foot have distal pieces of two joints, while 

 inferiorly the bristles again become slender and the terminal 

 pieces longer, while the rows of spikes on the end of the 

 shaft are fewer. The ventral cirrus is subulate and smooth. 

 In the typical foot the dorsal curve bears three top-shaped 

 ctenidia, and a group of clavate papillai bristled with minute 

 clavate cilia project from the tip of the dorsal division. The 

 bristles are long, tapering, and slender, their tips extending 

 beyond those of the inferior division. The ventral lobe like- 



