RHYNCHONERELLA PYCNOCERA. 147 



than the type, though none is wholly complete. A fragment about 10 mm. 

 long (Sta. 4588) consists of sixty-one somites. This is a very slender species 

 characterized especially by the long posterior tentacular cirri, this pair much 

 exceeding the others. The axes of the eyes meet at a considerable angle, the 

 lenses being directed cephalad of directly ectad. In most of the specimens the 

 proboscis is protruded; this is short and regularly cylindrical, with its surface 

 uniformly roughened with small granular elevations; about thirteen small 

 tubercles about the opening. 



Localities. Off Southwest Coast of Mexico: Sta. 4588 (lat. 19° 52' N., 

 106° 02' W.) Surface. Surface temp. 81° F. 12 October, 1904. Several 

 broken specimens. 



Off Southwest Coast of Mexico: Sta. 4598 (lat. 15° 58' N., 98° 13' W.). 

 Surface. Surface temp. 84° F. 15 October, 1904. 



Off Southwest Coast of Mexico: Sta. 4600 (lat. 15° 36' N., long. 96° 59' W.). 

 Surface. Surface temp. 82° F. 15 October, 1904. One broken specimen taken. 



Off Central America: Sta. 4613 (lat. 9° 43' N., long. 86° 15' W.). 300 fms. to 

 surface. Surface temp. 80° F. 19 October, 1904. One specimen. 



Off Peru: Sta. 4663 (lat. 11° 20' S., long. 88° 55' W.). Surface. Surface 

 temp. 69° F. 16 November, 1904. One specimen. 



Between Peru and Easter Island: Sta. 4689 (lat. 24° 05' S., long. 100° 20' W.). 

 300 fms. to surface. Surface temp. 72° F. 12 December, 1904. 



Between Easter Island and the Galapagos: Sta. 4702 (lat. 18° 40' S., long. 

 102° W.). 300 fms. to surface. Surface temp. 73° F. 



Between Easter Island and the Galapagos: Sta. 4708 (lat. 11° 40' S., long. 

 96° 55' W.) . Surface. Surface temp. 72° F. 29 December, 1904. Two fragments 

 taken. 



RHYNCHONERELLA PYCNOCERA, Sp. nOV.^ 



. Plate 25, fig. 7, 8; Plate 26, fig. 1-6. 



The general color at present is brownish, with the parapodia paler. The 

 segmental glands in full color are deep purplish, but some are only irregularly 

 pigmented. In the type they are most deeply and solidly colored on somites 

 near the thu-ty fifth. The eyes dorsally, the prostomial elevation, the base 

 of the median tentacle, and the ventral paired tentacles are colored, though 

 irregularly and not solidly, with a siirdlar dark pigment. Some dark pigment 



' TTVKi'os, tliick, and ic^pas, horn, tentacle. 



