I. On toe ANATOMY OF SutrRoa RosTRATA, A NEW ANNELID OF THE FAMILY OF 
LUMBRICULINA. 
By Gustav EIsEn. 
The oligochetous annelid, which is the subject of this monograph, was first 
found by me some ten years ago in the small body of water known as Mountain 
Lake, situated close to the Marine Hospital, on the Reservation west of San 
Francisco, California. During a recent visit to the same locality, in May, 1887, 
I found the same worm in exactly the same part of the lake, but, as before, 
in very few specimens. Perceiving the necessity of creating a new genus for this 
oligochete, I have done myself the honor to dedicate the same to Mr. Adolph 
Sutro, whose magnificent public scientific library, marine aquarium and zodlogical 
station on the Pacifie Coast will in the near future become one of the most promi- 
nent and valuable institutions of learning in this country. 
OLIGOCHALTA. 
Family. Lumpbriculide. 
A. Sub-family Trichoprittva Vejd. 
No solitary albuminous gland opening on the ventral side of the body. 
B. Sub-family Lumpricocina Vejd. 
A solitary albuminous gland opening on the ventral side of one of the ante- 
rior segments. Of this sub-family three genera are now known: 
1. Lumbriculus Grule 
Four pairs of seminal receptacles in segments 8, 10, ll and 12. A solitary 
albuminous gland in the ninth segment. The free secondary perigastric vessels 
begin in the thirteenth segment, and are all pulsating. The preseptal secondary 
vessels not branching, the postseptal one branching. Spines not distinctly forked.* 
Cephalic lobe not filiform. 
" Vejdov-ky, System, ete., der Olig chaeten, Prague, 1554, pag. 52. 
Mem. Von. I. 1. January, 1888. 
