48 CLASSIFICATION. 



DONDERSIIDAE Simikitii. 



]k)dy often worm-like. Cuticle thin; siiines flat and solid. Papillae lack- 

 infi;. Radiila distichous, nionoserial or lackins;. Salivary glands globular, sac- 

 or tulM'-like. (lill folds lacking. C'oeldnmdiicts united or s(>]iarate. C'opulatory 

 apparatus may be j^resent. Ventral fold and fvuidw may be absent. Living 

 free, or on corals, etc. 



Herpomenia, fjcn. nov. 



Length 11-lS mm. by ().()-(). 9 mm. Foot smoothed out, ciliated. Ventral 

 salivary glands very large, encircling the thick walled \'ery muscnlai' jihai'ynx. 

 Radula lacking. 1 jiair seminal rece]itacles. Shell gland almost globular. 

 Type of genus 

 H. platjipoda, ^Y>. ncjv. 



With the characters of the genus. Aleutian Ids., Alaska. (]). 151.) 



Dondersia Hiji)hk<'iit, 18SS. 



Body long, length index 10-4S. 1 ventral fold. S]iicula, needle- or spatula- 

 shaped, flat. Cuticle very thin, no pai)illae. Dorso-terminal sense knots 

 present. 1 ]iair of short ventral s;di\'ary glands, which unite before opening 

 out into the pharynx. Radula small, nionoserial or biserial. Mouth ca\'ity and 

 pharynx opening separated frcmi each other. No copulation spicula. Type 

 of genus, D.fesliva. 

 D. califiiniivd, sp. nov. 



Dorsal salivary glands very scant; ventral small. Radula with at least 

 12 i)airs of teeth. Inunature. Califoi'nia. (p. 155.) 



Ichthyomenia I'li.siun, Isiis. 



Body cyliiulric-couic, broader behind, narrowed in front. Cloaca opening 

 a terminal transverse slit, a jiromincMice in front of it. IuhA groove and foot 

 present, dis;i])])earing posteriorly. Cuticle not jtapillose, the ventral spicules 

 Ieaf-sha]ied, the rest scale-like, imltricating. No gills. Radula well developed 

 or i-uilimenta,ry, with appai'cntly two rows of teeth. Length 5 to 13 times the 

 breadth. Tyjie of genus, /. icltlhyodes. 

 I. iMronii, s]i. nov. 



Body pale yellowish white, Ki mm. long by 1.2 nnu. thick. Scales fish-like 

 and club-shaped. U])wards of 50 sensoiy pits in the anterior end. No radula. 

 California coast, (p. 159.) 



