TYPES OF POLYCHAETE WORMS HARTMAN 117 



ARCTONOE TUBERCULATA (Treadwell), new combination 



Figure 37, e, f 



Harmothoe tuierculata TREAowELii, 1906, p. 1154 (U.S.N. M. no. 5205; Hawaii). 



The type is an ovigeroiis adult, its total length about 15 mm, its 

 greatest width between segments 12 and 14 about 3 mm. All elytra and 

 dorsal cirri have been lost. Ventral cirri of the first two segments 

 remain and are moderately developed, as typical of the genus Arctonoe, 

 defined above. The ventral cirri are completely lacking (fig. 37, /). 

 Parapodia are short, broad, thick, similar throughout. The noto- 

 podium is reduced to a fingerlike lobe, extending distally beyond the 

 neuropodium (fig. 37, /) , provided with a slender aciculum and a few 

 (3 to 6) falcate setae, smooth along their lateral margins except for a 

 few closely set, transverse rows of minute pectinae in the subterminal 

 region (fig. 37, e). 



The prostomium is macerated, its anterior appendages not dis- 

 cernible, its posterior margin partly overlapped by a peristomial 

 nuchal hood. 



Genus HARMOTHOE Kinberg 



HARMOTHOE ACULEATA Andrews 



Harmothoe aculeata Andrews, 1891, p. 278 (U.S.N.M. no. 4876; North Carolina). 



The type vial contains several specimens, 7 with anterior ends of 

 which 3 are more or less complete. Total number of setigerous seg- 

 ments varies from 34 to 36. II. aculeata resembles the European 

 H. areolata Grube ; the areolations of the elytra, however, are much 

 less marked in //. aculeata, and the spines of the first pair of scales 

 are shorter than those more posteriorly. A characteristic feature 

 is the neuropodial lobe, which is prolonged into a slender, dorsal, 

 attenuated tip (see Andrews, 1891, fig. 3). 



HARMOTHOE VILLOSA Treadwell 



Harmothoe viUosa Treadwell, 1926, p. 10 (U.S.N.M. no. 19190; Samoa). 



Both dorsal and ventral cirri are hirsute, as are also the prostomial 

 antennae. Palpi are smooth. This species approaches H. hirsuta 

 Johnson in tlie character of its prostomium and appendages, its noto- 

 podial and neuropodial setae, and the proportions of the parapodia. 

 The elytra are ciliate along their outer, lateral margins and spiny, 

 but there are no definite polygonal areas such as Johnson first de- 

 scribed for//, hirsuta (Johnson, 1897). 



Ditlevsen (1917, p. 36) assigned Eucranta viUosa Malmgren (1865, 

 p. 80) to the genus Harmothoe. This species is a Eiwranta Malm- 

 gren. 



