82 THE ANNELIDA POLYCHAETA. 



Laetmonice "wtvillei (Mcintosh). 



Laetmonice producta var. wyvilUi McIntosh, Challenger Annelida, 1885, p. 44, pi. 7, fig. 3, pi. 4A., 



f. 9-11. 

 Laetmonice producta wyi'illei Treadwell, Bull. U. S. fish comm., 1906, 1903, 23, pt. 3, p. 1157; Moore, 



Proc. Acad. nat. sci. Philad., 1910, p. 386. 



Plate 11, fig. 1, 2. 



Locality. Off Peru: Sta. 4675 (lat. 12° 54' S., long. 78° 33' W.). Depth 

 3,120 fms. 22 November, 1904. Four specimens. 



These specimens agree in general with the form described by Mcintosh. 

 They show the same papUlose ventral surface, and the very dark, dull, coarse 

 dorsal setae. The dorsal setae agree well in structure with those of the types 

 excepting that the tip is perhaps proportionately a little more slender. There 

 are three or four recurved teeth on each side but in one of the spines there 

 are proximad of these principal teeth a series of reduced ones on each side such 

 as noted also in certain spines of the typical L. benthaliana Mcintosh. The 

 ventral setae are nearly typical, excepting that the terminal hook seems longer, 

 approaching more the condition in L. producta Grube; the pinnae are very 

 numerous, seventy or more in number, and the basal hook is small and short 

 as in the types. The ventral cirri differ in being minute, more as is typical for 

 benthaliana. The precise relationship of the forms grouped under and about 

 producta has yet satisfactorily to be worked out when sufficient material becomes 

 available. 



Laetmonice benthaliana (Mcintosh). 



Laetmonice producta var. benthaliana McIntosh, Challenger Annelida, 1885, p. 45, pi. 8, fig. 4, 5, pi. 4A, 



fig. 12, pi. 5A, fig. 1, 2. 

 Laetmonice producta benlhaliana Moore, Proc. Acad. nat. sci. Philad. , 1903, p. 420; Izuka, Journ. Coll. 



sci. Imper. univ. Tokyo, 1912, 30, p. 84, pi. 9, fig. 7-10. 



Localities. Off Panama: Sta. 4458 (lat. 6° 30' N., long. 81° 44' W.). 

 Depth 555 fms. Bottom, green sand. Bottom temp. 40.2° F. 24 February, 

 1891. Two specimens. 



Off the Galapagos Islands: Sta. 3402 (lat. 0° 57' 30" S., long. 89° 3' 30" W.). 

 Depth 421 fms. Bottom rock and Globigerina ooze. Bottom temp. 42.3° F. 

 28 March, 1891. 



Between Panama and the Galapagos Islands: Sta. 4630 (lat. 6° 45' N., 

 long. 81° 42' 30" W.). Depth 556 fms. Bottom green sand. Bottom temp. 

 40.5° F. 3 November, 1904. Four specimens. 



