NO. 1 hartman: goniadidae, glyceridae, nephtyidae 37 



Ophioglycera gigantea Verrill, revised 

 Plate 5, figs. 1-3 



Ophioglycera gigantea Verrill, 1885b, pp. 436-438; Arwidsson, 1899, 

 pp. 31-32; Hartman, 1944a, p. 339, pi. 47, fig. 1, pi. 50, fig. 4, 

 pi. 57, fig. 1. 

 Ophioglycera grandis Verrill, 1885a, pi. 42, fig. 185. 



Material examined. — Off Prudence Light, Narragansett Bay, Rhode 

 Island in 14^4 fms, bottom sandy mud broken shells, collected August 

 31, 1880, U.S. Fish Commission Steamer Fish Hawk, locality 846 

 (1 specimen). 



The available individual was dredged and is thus not the epitokous 

 one used by Verrill (1885b) but the label in the vial is believed to be 

 in Verrill's handwriting and undoubtedly represents the same species as 

 the type taken in the same locality. The appended label reads "off New- 

 port, R.I. U.S.F.C. 1880, Loo 846," together with the name of the 

 species. 



The specimen is fixed and preserved in an awkward misplacement 

 such that the prostomium and first 30 segments are entirely telescoped 

 within the last 37 segments of the piece. The prostomium is thus with- 

 drawn to the inside of segments 67 and the anterior segments are re- 

 versed so that exterior parts lie within. Furthermore, the proboscis 

 has been completely dissected away in such manner that the basal end 

 of the dorsal side of the prostomium is also cut away, but the ventral 

 side of the prostomium is intact and firmly connected with the body. 



Contrary to the original account, the prostomium is not smoothly 

 rounded in front, but is annulated and conical, as in other members of 

 the GONIADIDAE. It consists of a depressed lobe, ending in front in 

 4 short antennae (fig. 1). The prostomial rings number 8 or 9, includ- 

 ing the incompletely separated distalmost ring. At the sides and dorsally 

 the rings are uniannulate, but ventrally each ring is crossed by a shal- 

 low, transverse sulcus. No eyes have been seen but the ocular areas on 

 the sides of the basal ring have been dissected away. 



The first few parapodia are small and inconspicuous but they in- 

 crease in size gradually. By the third segment the bifurcated setal lobe 

 and the long dorsal and ventral cirri are already well developed. Farther 

 back these parts increase in size and the presetal lobes diverge so that 

 the acicular lobe can be seen between them (fig. 2). The postsetal lobe 

 is long, triangular and surpasses the presetal lobes. Composite setae 

 emerge in a spreading fascicle but the uppermost and lowermost ones 

 are continued so as to partly surround the presetal lobes at their upper 

 and lower bases. 



