CLASSIFICATION. 45 



Pachymenia, gen. nov. 



Body stout, measuring 27 l)y 4.5 mm. One layer of awl-like spines, papillae 

 multicellular with broad bases, posteriorly ill defined. Pharynx very large 

 and muscular with numerous glands some of which open by one pair of ducts at 

 forward border of pharynx. Dorsal and ventral limbs of coelomoducts provided 

 with numerous glands. One pair of small seminal receptacles. Cloacal wall 

 covered with glands except region of branchial folds. No copulatory spines. 

 T>T)e of genus 

 P. abyssorum, sp. nov. 



With characters of the genus. California, (p. 72.) 



PRONEOMENIIDAE Simroth. 



Worm-liko. Radula distichous or polystichous, sometimes lacking. Sali- 

 vary gland-; tubular, lobed or lacking. Cuticle thick, spicules mostly needle- 

 like in several layers. Epidermal papillae present. Gills usually lacking. 

 Coelomoducts usually united into shell gland, sometimes separated. Copulatory 

 apparatus may be present. Free living, partly or entirely parasitic. 



Proneomenia Hubrecht, 18S0. 

 Body elongated, vermiform, the length 9-50 times the tliameter. Cloaca 

 opening ventral. Foot present, the groove passing into the cloaca. Cuticle 

 thick with crowded spicules. No gills. Radula multidentate. Two salivary 

 glands. Copulatory organs present or absent. Type of genus, P. sluiteri. 



P. hawaiiensis, sp. nov. 



Length 36 by 2 mm. Dorsal and ventral salivary glands. Radula with 

 38-40 teeth in each transverse row. One pair of seminal receptacles. No 

 copulatory organs. Hawaii, (p. 82.) 

 P. insu'aris, sp. nov. 



Anterior end similar to the foregoing species (posterior end missing). One 

 pair long, tubular salivary glands. Radula polystichous with 28 transverse 

 rows. Hawaii, (p. 90.) 



Driomenia, gen. nov. 



Measurement 9 by 1 mm. Cuticle thick, papillae present, spines needle- 

 shaped, slightly curved. Atrium separate from mouth opening, no radula, one 

 pair globular ventral salivary glands. Antero-lateral pericardial wall prolonged 



