14 LEODICID^ OF THE WEST INDIAN REGION. 



The setae are of three kinds, simple, compound, and pectinate, probably present in 

 all somites, though I was unable to find any pectinate ones in the first parapodium. Of 

 the simple setae (text-figure 8) the dorsalmost ones in each parapodium are longer than 

 the others, but otherwise they are of exactly the same form, the difference of length 

 being due to length of shaft. They are slightly broadened toward the ends, one margin 

 of this being striated, and taper to an acute tip. The compound (text-figure 9) have 

 rather a heavy basal portion, with its apex beveled and striated, its terminal portion 

 with a large apical and small subapical tooth, covered by a hood with serrated edge. 

 The pectinate setae (text-figure 10) have a long tooth at either end of the row, with 

 about 14 small, sharp-pointed, intermediate teeth. 



The jaw apparatus is comparatively light in color, becoming darker with increase 

 in the size of the animal. In the maxilla the carrier is short (text-figure 11), the outer 

 portion of either half is rounded and wing-like, thinner than the inner portion. There is 

 a dark-brown band along the junction of the two halves. The forceps are long and 

 slender, dark brown at the apices, with little color elsewhere except at the base. The 

 right proximal plate has 7 teeth, the left 6, both plates dark brown along the edges 

 but lighter elsewhere. The right distal plate has 10 teeth, the left not more than 8, 

 the unpaired has 6. All of these plates have the toothed margins colored, but with 

 scarcely any color elsewhere. There is a dark-brown patch anterior to each distal 

 paired plate. The mandible (text-figure 12) is much lighter in color than the maxilla, 

 each half with a dark-brown patch along its inner anterior margin and with a faint 

 coloration along its beveled portion. 



Webster described his species longicirrata as having long, delicate, smooth tentacles, 

 this being the main difference between this and articulata. I have examined Webster's 

 type in the U. S. National Museum and find that while the articulation is not very clear 

 in this preserved specimen, it certainly is present. The removal of this distinction 

 makes it clear that the species are identical. Ehlers gives only a brief description of 

 the species articulata and figures the dorsal cirri as sharply articulated. As I have 

 stated above, they appear articulated, but a more careful study shows this to be an 

 irregular wrinkling and not a true articulation. Verrill records neither articulata nor 

 longicirrata from Bermuda, but describes two species, elegans and margaritacea, the first 

 from only a single individual. From a comparison of his descriptions with specimens of 

 longicirrata collected by myself in Bermuda, in the locality where he records margari- 

 tacea as abundant, I am convinced that both species are identical with longicirrata. 



At the Dry Tortugas, Tobago, and Bermuda I found L. longicirrata living in tubes 

 covered with small stones and bits of shell on the under side of stones in tide pools, but 

 never abundant. Ehlers's specimens were taken "off French Reef in 15 fathoms." 

 Augener's material was collected in latitude 41° 34' 30" N. and longitude 65° 54' 

 30" W., and in latitude 33° 42' 15" N. and longitude 76° 00' 50" W., the first in 306 

 fathoms, the second in 464 fathoms. It was described by Treadwell from Porto 

 Rico, and the collection of the American Museum of Natural History contains specimens 

 from the Bahamas. The U. S. National Museum has specimens from Pernambuco, 

 Brazil; from St. Thomas in the Virgin Islands; from Cuba; from Key West; from latitude 

 27° 04' N. and longitude 83° 21' 15" W. in 26 fathoms; from latitude 28° 45' N. and 

 longitude 85° 02' W. in 30 fathoms; from latitude 29° 11' 30" N. and longitude 85° 29' 

 W. in 26 fathoms; and from latitude 28° 9' N. and longitude 82° 50' W. in 12 1^ 

 fathoms. It seems to me probable that the specimens described by Mcintosh as a 

 variety of Eunice (Leodice) vittata were of this species, since the agreement in tentacle 

 structure and gill arrangement is very close between the two. 



