496 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol. 45. 



PHALLUSIA VERMIFORMIS, new species. 



Plate 36, fig. 42. 



Superficial characters. — Long and irregularly cylindrical, the gen- 

 eral appearance being considerably that of the tubes of some of the 

 tubicolous worms, particularly some of the chsstoptera. Length of 

 longest specimen 140 mm., width 30 mm. ; surface uneven, bearing on 

 and embedded in it various foreign bodies as sponges, hydroids, cal- 

 careous algse, etc. Test rather thick, opaque white, semicartilagi- 

 nous. Animal apparently attached along whole right side. Bran- 

 chial orifice at anterior end, atrial nearly half way back on dorsal 

 side; lobing of orifices obscure, apparently eight for each; scarcely 

 siphonate, though atrial orifice a.t the summit of a prominence. 

 Mantle very thin and delicate on the left side, but thick and strong 

 on the right, forming on this whole side a distinct pad or "sole." 



Respiratory system. — Tentacles 100 to 150, long and slender, sev- 

 eral sizes. Hypophysis mouth horseshoe-shaped, the left Hmb nearly 

 straight, the right strongly hooked inward but not coiled. Branchial 

 sac drawn out behind the digestive tract into a straight appendage 

 considerably longer than the portion in front of the intestine (pi. 36, 

 fig. 42 h. p.), and about one-half as broad as the anterior part. Wall 

 of sac slightly if at all pHcate; internal longitudinal vessels bearing 

 papillaB only at the points of crossing of the transverse vessels; that 

 is, no intermediate papillge present. Seemingly no exception to this. 

 From 3 to 5 stigmata between the longitudinal vessels. Transverse 

 vessels of nearly same size. Dorsal lamina a rather broad membrane, 

 edge smooth throughout; sides of the membrane ribbed posteriorly 

 but not anteriorly; extending considerably behind the esophageal 

 openmg but not to the end of the posterior pouch of the sac. 



Alimentary system. — A very compact mass small in proportion to 

 the size of the branchial sac, it being hardly longer than the portion 

 of the sac hi front of it, and considerably shorter than the posterior 

 pouch of the sac. Esophagus narrow and sharply curved; stomach 

 globose, inner wall longitudinally furrowed, somewhat irregularly, 

 some furrows being bifurcate. Furrows about 14 in number. Loop 

 of the intestine following the stomach long and close. Renal organ 

 a finely ramifying network on intestinal wall and within the intestinal 

 loop. 



Reproductive system. — Lying in the intestinal loop, sperm duct and 

 oviduct following closely the course of the rectal bend of the intes- 

 tine, the oviduct only visible to surface view for the proximal two- 

 thirds of the length of the two, the sperm duct lying deeper and ap- 

 pearing only toward the end of the course (fig. 42, ov. d. and s. d.). 

 Male and female gonads not readUy distmguishable in the specimens 

 at hand. 



