1902.] NATURAL SCIENCES OF PHILADELPHIA. 263 



distinct longitudinal groove in which short transverse ctenoid plates 

 are situated. The non -spinous basal portions of these setse and 

 the smooth interval on the convex border are covered with numer- 

 ous minute granulations (PI. XIII, fig. 8) which become less 

 numerous and finally disappear distally. 



The neuropodial setse (PI. XIII, figs. 9-13) are less character- 

 istic. They are arranged in eight or nine horizontal rows and are 

 less numerous and rather stouter than the notopodials, notably at 

 the distal end, where their enlarged spinous portions contrast con- 

 spicuously with the attenuate tips of the former. From ventral to 

 dorsal the spinous tips increase in length much more rapidly than 

 the entire free porlion of the setae, these regions being as one to five 

 or six in the ventral, and as one to three in the dorsal. The num- 

 ber of spinous rows is large, but varies only from twenty -three in 

 the ventral to twenty-seven in the most dorsal. Distally the teeth 

 are coarse and the rows rather widely separated, proximally they 

 are tine and the rows crowded. The smooth tips are rather long, 

 without accessory processes and on typical set^e strongly hooked and 

 sharp-pointed. Probably as a result of wear, the tips of the prom- 

 inent dorsal neuropodial setpe are blunt. On the second and third 

 parapodia the neuropodial setae are intermediate in form between 

 the typical neuropodial and notopodial setse just described; their 

 tips are straight and slender, and the spines very long aud few in 

 number. The first foot bears a tuft of four or five of the noto- 

 podial type. At the posterior end the setse show modifications from 

 the type similar to the anterior. 



Pigment, if originally present, has almost entirely disappeared. 

 A general pale-yellow hue results from the dull yellow of the spines 

 on the elytra, the hay color of the notopodial, aud the rich amber 

 of the neuropodial setse. 



Two specimens. McCormick Bay, P. R. E. 

 Gattyana oiliata sp. nov. 



In ventral aspect the body is rather slender aud nearly linear, 

 and tapers very gently from about X to the posterior end. Dor- 

 sally it is strongly convex. The type consists of two imperfect 

 individuals, one consisting of twenty-one anterior somites, the 

 other of thirteen posterior somites, together constituting nearly the 

 total number. These measure respectively 30 and 12 mm. long, 

 so that length of a complete example of this size would probably be 



