Notes on the morphology of the Tunicata. 585 



The Wood's Holl specimens which I have, I at first thought be- 

 longed to a new genus, but more careful study of Traustedt's 

 description of Bosirichohranchus nianhattensis convinces me that my 

 specimens shoukl be classed as a new species of the same genus 

 and I therefore name them B. molguloides from their general super- 

 ficial resemblance to the Molgulas. I give a translation of Trau- 

 stedt's description B. manhattensis and a description of the Wood's 

 Holl species B. molguloides. 



''BosiricJiohranchus (Traustedt) because of 1) the branchial 

 sac's lack of real folds, 2) the presence of the genital organs on 

 only one side, and 3) the said organs being located within the in- 

 testinal loop, is closely connected with the genus Eugyra Alder 

 and Hancock. The exceedingly peculiar coiled or cork-screw-like shape 

 of the numerous infundibula in the meshes of the branchialsac — I 

 believe — will explain the justification of a separation from Eugyra" 



''Bosirichohranchus manhattensis (De Kay)". "The body is more 

 or less globular in form, somewhat compressed, 18 mm long, 19 mm 

 high, 8—9 mm thick." 



"The mantle is quite thick and tough; the surface is wrinkled, 

 most frequently covered with sand, fragments of zostera, small 

 gastropods, and the like. The color of the specimens in alcohol is 

 a light olive green." 



„The muscles of the body have a peculiarly characteristic distri- 

 bution, because the strongly developed muscles around the apertures 

 extend both in front and behind on the animal, on each side of the 

 midline where the muscles are lacking, in a row of transverse fibres ; 

 these two rows reach around the ventral surface, so that a large 

 round region on each of the sides of the animal, as well as the inter- 

 mediate space between the two rows of muscle fibres in front, behind 

 and below, are completely destitute of muscles." 



"The mouth aperture and cloacal aperture are upon siphons of 

 medium length situated close to each other." 



"The tentacles, 10—12 in number, 6 of which are very long." 



"The ciliary organ quite large, shaped like a horse-shoe; the 

 opening between the two incurved horns turns to the left and some- 

 what forward. The ganglion is rather long and is situated somewhat 

 behind the ciliary organ." 



"The branchial sac has on each side 7 very strong longitudinal 

 bars. The compartments are elongated, rectangular, and provided 

 with a multitude of spindle-shaped projections which extend into the 



