LEODICID^ OF THE WEST INDIAN REGION. 



53 



95 somites. It was collected on Buccoo Reef in Tobago in the same localities as Nicidion 

 kinbergii, which it resembled in general appearance. 



The prostomium is distinctly bilobed, with prominent eyes (plate 4, figure 12). 

 Its dorsal surface is yellowish brown with a colorless patch on either side of the base of 

 the median tentacle. This patch may be described as starting in three points from the 

 posterior border of the prostomium. The median one surrounds the base of the median 

 tentacle and broadens in front of it to meet the others on either side. The lateral 

 patches also start from the posterior border, surround the eye and bases of inner and 

 outer paired tentacles, and unite with the median one, so that the greater part of the 

 dorsal surface is covered. The cirrophores are colored, but only in the larger speci- 

 mens was any color present on the tentacle. The whole anterior region is yellowish 

 brown with numerous white spots, this coloration being more intense toward the 

 anterior end. Behind the region of somite 25 the color is gray, with a tendency toward 

 a grouping in transverse bands. On the dorsal surface of somite 6 is an irregular patch 

 of white, which may extend over onto somites 5 and 7. 



The tentacles are rather short. The median, which is the longest, extends as far 

 as the posterior border of the peristomium. 



The peristomium is as long as the following three somites (plate 4, figure 12), the 

 second somite about one-third as long as the first. There is little narrowing of the body 

 until near the posterior end. 



Text-figures 164 to 173. Leodice notata Treadwell. 



164. First parapodium xSO. 



165. Tenth parapodium x50. 



166. Gilled parapodium x50. 



167. Compound seta x380. 



168. Simple seta x3S0. 



169. Pectinate seta x 380. 



170. Dorsal acicula x200. 



171. Ventral acicula x200. 



172. Maxilla x34. 



173. Mandible x34. 



