LEODICID^ OF THE WEST INDIAN REGION. 39 



saw no other specimens. Verrill lists it from Bermuda and I collected it at Tucker's 

 Bay, Bermuda, and in the Dry Tortugas. It is not common in either locality, as I 

 found only one individual in Bermuda and not over six in five seasons' collecting at the 

 Dry Tortugas. Augener's specimens were collected from Barbados at 69 fathoms and 

 Santa Cruz at 115 fathoms. Ehlers's were collected at the Tortugas and at latitude 

 24° 43' N., longitude 83° 25' W., in 37 fathoms. 



Leodice guanica, new species. 



(Plate 2, figures 9 to 12; text-figures 107 to 116.) 



The first specimen collected was small, 70 mm. long, with 95 somites, and a head- 

 width of 2 mm.; figures 10 to 12, plate 2, were drawn from it. Larger individuals were 

 obtained later, and figure 9 was drawn from one of them. In the smaller specimens 

 the entire animal has a decidedly greenish tinge, though as seen under high power this 

 is more intense in the anterior than in the middle or posterior region. In the larger 

 specimens the tentacles were colorless except for narrow brown bands which sometimes 

 seem to extend entirely around the tentacle. In the larger specimen the anterior region 

 of the body is a dark-brown color, with the sixth somite uncolored dorsally. The 

 nuchal cirri are colorless and much shorter than the peristomium. The eyes are large 

 and of a purple color. The prostomium varies in the two specimens, being large and 

 green in the smaller and much smaller and reddish brown in the larger. The peristo- 

 mium structure differs also in the two individuals, as may be seen by a comparison of 

 figure 9 with figure 10. A comparison of these figures would lead to the conclusion 

 that the two are of entirely different species, but from a careful study of the two animals 

 I am convinced that they are really the same. 



The first parapodium (text-figure 107) has relatively large dorsal and ventral cirri 

 with needle aciculse in the former and large aciculse in the setal lobe. The tenth para- 

 podium (text-figure 108) has an anterior and posterior lip and two large aciculse. The 

 dorsal cirrus is lanceolate with needle aciculse; the ventral cirrus is a rounded conical 

 lobe on a basal swelling. A parapodium from the middle of the body shows a very 

 great reduction in the size of the cirri, the dorsal being much smaller than the single 

 gill-filament and the ventral a conical lobe on the lower surface (text-figure 109). The 

 setal lobes are low and equal and there is a ventral hooked acicula not represented in 

 anterior somites. There are two pairs of very unequal anal cirri (plate 2, figure 12). 



The gills begin on about the seventeenth somite and continue to the extreme 

 posterior end of the body, being relatively more prominent posteriorly. In most cases 

 there is but a single filament (text-figure 109), though some may be bifid (plate 2, 

 figure 11). They are always much more prominent than the dorsal cirrus. 



The simple setse (text-figure 110) are expanded and curved toward the ends, with- 

 out denticulations, the apices being very fine-pointed. The compound setse (text-figure 

 111) have each a basal joint with the apex slightly expanded and very minutely den- 

 ticulated, the terminal joint with 2 equal teeth (apical and subapical) covered by a 

 denticulated hood. The pectinate setae (text-figure 112) have about 13 teeth, the 

 terminal ones the longer. 



The aciculse are light brown, the apex of the simple one being much darker than 

 the shaft (text-figure 113). Throughout the middle and posterior region of the body a 

 second form of acicula occurs with a curved and bidentate apex. This does not show 

 as dark a tip as do the others (text-figure 114). 



The maxilla (text-figure 115) is grayish brown with darker edges. The carrier is 

 small, the forceps rather large and heavy. Each proximal paired plate has 4 teeth, the 

 distal paired have 9 on the right and 4 on the left, the unpaired has 4. There are 



