730 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. xxxn. 



Genus ANAPTA Semper. 



Anapta Semper, Rei^eii iin Archipel I*liilippiiien, Pt. 2, I, Holotlinrien, 1808, p. 

 17. Type, Amipta yrucUiH Semper. 



Tentacles 12, pinnate. Deposits in form of oval or elongate grains, 

 or entirely absent. General form, synaptoid. 



ANAPTA INERMIS, new species. 



Plate LXXIII, tio;. 2; Plate LXXXII, %. 1. 



Tentacles 12, digitate, each with about 12 to 16 very small, slender 

 digits; end of tentacles rounded without an evident odd terminal digit. 

 Digits increase slightly' in size distad. General form of bod}" rather 

 robust, with rounded posterior extremity. Body wall thin, tran.slu- 

 cent, the five longitudinal muscle bands showing plainl}'. Deposits 

 entirely wanting. Color in alcohol, bleached grayish, profusel}^ cov- 

 ered with small reddish brown or 3 ellowish brown spots, more abun 

 dant in anterior than in posterior part of bod3^ In type these spots 

 are fused on anterior half of body, giving a raw sienna tint with larger 

 grayish spots and smaller dark brown dots. Often the brownish mud 

 in alimentary canal gives the bodj^ a brown hue. In some specimens 

 the small l)rown spots are few in posterior portion of bod}". Calcareous 

 ring stout, composed of ten and eleven pieces in two specimens dis- 

 sected. Pieces unequal, both radial and interradial with an anterior 

 tooth and nearly straight posterior border. One large Polian vesicle. 

 (Plate LXXXII, tig. 1.) One very short, rather inconspicuous, madre- 

 poric canal at ante rior^ edge of dorsal mesentery. Gonad large, with 

 a central trunk to either tuft, from which spring branches either sim- 

 ple or once dichotomously branched. Alimentary canal veiy large 

 and usually gorged with mud, giving the animal a plump appearance. 

 Length, about 100 mm.; greatest breadth, about 14 to 20 mm.: in life 

 probably somewhat longer and slenderer. 



Localities.— Ty^Q (Cat. No. 21228, U.S.N.M.) from Station 3910, 

 south coast of Oahu Island, 311 to 337 fathoms, tine gray sand and 

 mud; bottom temperature 43.7 ; 2 specimens. Taken also from the 

 following stations, in all, 11 specimens. 



List of stations. 



