44 CLASSIFICATION. 



thorax and preabdomen respectively. Buccal plate shield-shape. Largest 

 spines relatively slender without definite keel. Alaska, (p. 68.) 



C. scabra, sp. nov. 



Small, measuring 12 mm. in length by 2 mm. greatest diameter. Body 

 wall relatively thin. Brownish, becoming olive-green in region of digestive 

 gland. Monterey Bay, California (p. (i3.) 



Limifossor Heath, 1904. 



Body short. Radula very large, distichous, with twenty-eight transverse 

 rows in L. talpoideus (about the same number in L. Jratida). Dorsal salivary 

 glands present. Stomach and digestive gland well developed, and distinct from 

 intestine. Type of genus, L. talpoideus. 

 L. fratula, sp. nov. 



Slaty gray with yellowish cast. Spines from middle of body 0.5 mm. long. 

 Length index 1.3-4.7. Cahfornia. (p. 72.) 

 L. talpoideus. 



Slaty gray in color. Spines, from all parts of the body, 0.02-0.38 mm. in 

 length. Length index 1-6. Alaska, (p. 69.) 



NEOMENIIDAE Sim roth. 



Body compressed, more or less crescent-shaped, without distinct divisions. 

 Index 7 at most. Opening of atrium ventral, of the anal chamber ventral or 

 terminal. Ventral furrow present, usually with several folds. Cuticle some- 

 times comparatively thick, spines mostly needle-like, flat, grooved, or hollow. 

 A circlet of gills in the anal chamber. Radula and salivary glands usually lack- 

 ing. Epidermal papillae, of simple structure, usually present. Fore gut pro- 

 trusible. Coelomoducts separate or united to form shell gland or copulatory 

 organ. Digestive gland lacking. Penial spines usually present. Free, creep- 

 ing about over bottom. 



Drepanotnenia, gin. nov. 



Body short and thick. Hollow needle-like spines with truncateel bases; 

 slender stalked papillae. Ventral salivary glands long and tubular. Coelomo- 

 ducts simple, without appendages. No copulatory apparatus. Tyjie of genus 



D. vampyrella, sp. nov. 



With characters of the genus. Hawaii, (p. 77.) 



