A NEW ANNELID FROM FLORIDA — HARTMAN 505 



and distributional data indicated; more complete bibliographic ref- 

 erences are given elsewhere (see Hartman, 1944). 



SABELLARIA FLORIDENSIS STEPHENSONI, new subspecies 



Figure 40 



Collection. — Marineland, northern shore of eastern Florida, between 

 tide marks ; clump of tubes with many specimens. 



The relative proportions of peduncle, thorax, abdomen, and cauda, 

 for a smaller individual, are illustrated in figure 40, a. Opercular 

 paleae are straw-colored ; the peduncle is dorsally traversed by seven to 

 nine slightly oblique broken bands of dark pigment, which is most 

 intense along the middorsum and extends laterally with diminishing 

 intensity toward the oral tentacular region. Similar though darker 

 pigment spots occur on thoracic and abdominal neuropodia. Cauda 

 and branchiae are paler than the other parts of the body (preserved). 



Length of a larger individual is 12 mm., excluding the cauda, which 

 is usually turned under. Setigerous segments consist of two anterior 

 thoracic, three parathoracic, and 20 to 24 abdominal ones. The first 

 two are uniramous: all subsequent ones are biramous, as typical of 

 other species of the genus. The uncinial tori of the last eight setig- 

 erous segments are slenderer and longer than the others. The cauda 

 lacks visible amiulation ; when turned under it extends forward to the 

 twelfth abdominal segment. 



The opercular crown has 15 to 17 paired outer paleae, 4 or 5 shorter, 

 and an equal number of alternating longer paired middle, and nine 

 paired inner paleae; the total number in the outer row (30 to 34) is 

 thus about the same as that of middle and inner rows combined. In 

 addition, the dorsal end of the outer row has two pairs of projecting 

 acicular spines (fig. 40, g) that project freely and tend to overlap at 

 their distal ends; their embedded bases extend back through the 

 peduncular tissue. The outer paleal row is bound by a circlet of pale, 

 tapering papillae that number about 24 ; they are smallest and closest 

 together on the dorsal side. 



The outer opercular paleae are long, distally serrated (fig. 40, /) 

 with about 15 points; their flat surface is nearly smooth. Middle 

 paleae, under low magnification, also appear smooth but under higher 

 power are seen to be delicately spinous. The longer (fig. 40, e) and 

 shorter (fig. 40, c) are similar to each other except in their distal ends. 

 Inner paleae are delicately spinous along their free portions; they 

 end in a serrated edge (fig. 40, d) . 



Oral tentacles number about five rows on a side, and four to eight 

 in a row ; they are crowded and fill the oral area. Individually they 

 are seen to be uniformly slender and ciliated and to have longitudinal 



