NO. 2 HARTMAN : POLYCHAETOUS ANNELIDS 277 



1927, pp. 285-286), A. accraensis Augener (1918, pp. 561-562) from 

 the African Gold Coast, and J. antipoda Augener (1926, pp. 241-242) 

 from New Zealand. A. occidentalism new species, is the first record of this 

 genus from the Western Hemisphere. 



KIeyto Species 



1. With 10 anterior setigerous segments . . A. trilobata (Sars) 



2. With 11 anterior setigerous segments . A. antipoda Augener 



3. With 11 left, 13 right, anterior setigerous segments .... 

 A. accraensis Augener 



4. With 12 anterior setigerous segments . . . A. occidentalis 



Amaea occidentalis, new species 

 Plate 26, Figs. 66, 69 



Two nearly complete, well-preserved individuals were collected at 

 Inverness, Tomales Bay, during the summer of 1935 ; another was found 

 in Bodega Lagoon, in June, 1941, by T. L. Rodgers. In the largest one, 

 the body is coiled, but its total length attains about 50 mm; the greatest 

 width, in the anterior thoracic region, is 6 mm. The anterior end is 

 concealed by the innumerable tentacles, but the prostomium is easily 

 discerned, on the ventral side, as a great spatulate lobe (pi. 26, fig. 66). 

 The peristomial ring forms the lower lip; its lateral and dorsal portions 

 are the base of attachment for the 2 kinds of tentacles. Its ventral portion 

 is broad, weakly trilobed (pi. 26, iig. 66) ; this is continued laterally as 

 a full, folded membrane, to which many slender tentacles are attached. 

 The lateral portions are more or less separated from the dorsolateral and 

 dorsal portions. The former is also provided with many slender tentacles, 

 and the dorsal portion is a crescentic area to which the broadly dilated, 

 large tentacles are attached. The slender tentacles obviously function for 

 food-getting, since they immediately surround the oral aperture. The 

 larger tentacles, attached along the base of the dorsal side of the pro- 

 stomium, may function for cleaning the slender tentacles, suggested by 

 the deep groove (pi. 26, figs. 68, 69) on their ventral side. 



Dorsal and ventral sides of the first 9 or 10 segments are closely 

 covered with fine, low papillae, but they do not conceal the shallow, 

 intersegmental furrows (pi. 26, fig. 66). Thereafter the epidennalsur- 

 face comes to be increasingly smoother, translucent, and continues so to 

 a far posterior region, where it comes to be increasingly rugose. 



