

PKOF. E. EAT LANKESTEE ON GOLFINGIA MACINTOSH!!. 471 



is seen attached loosely to the whole length of introverted proboscis {y). From the middle 

 point between the retractors passes backwards the oesophagus (I) lying in close proximity 

 to the rectum ; a little way back they are twisted round one another. A curious muscular 

 band (the spindle-muscle of Selenka) accompanies the rectum (figs. 9, 10, m), and is 

 attached, after running a length of two inches, to the wall of the intestine. A similar 

 muscular band exists in Sipunculus nudus (and most Sipunculids), arising in that animal 

 from the curious little csecal pouch which exists on the rectum at the distance of an inch 

 or so from the anus. 



I could not find any trace in Golfingia of this caecum, nor of the " bush-like organs " 

 near the anus, which appear in Sipunculus nudus, possibly to represent in a rudimentary 

 form the posterior nephridia (cloaca! trees) of the Echiuridean Gephyrsea. 



Owing to the imperfect state of preservation of the specimen, I am unable to state 

 whether any vascular system of one kind or another exists in Golfingia, nor am I able to 

 give any indication as to the position of the gonads. 



The distinctness of Golfingia from all other genera of Sipunculid Gephyraeans will be 

 obvious at once to those who have studied this group of animals. The species I dedicate 

 to my friend Prof. Macintosh, not only in recognition of his vast services to marine 

 zoology, but in memory of a long-standing friendship marked by many acts of kindness 

 on his part. 



The relation of Golfingia to other genera of Sipunculidean Gephyrseans will be best 

 appreciated by the reader if I make use of the synoptic table recently published by 

 Selenka, and assign Golfingia its place in a modification of that table. It is not far 

 removed from Aspidosiphon, but differs from that genus both in the form of its sclerites 

 and in the disposition of the retractor-muscles and the character of the oral tentacles. 



SlPUNCULOIDEA. 

 (Slightly modified from " Die Sipunculiden " of Dr. E. Selenka, Wiesbaden, 1883.) 

 Marine worms with cylindrical elongate bodies, with obliterated segmentation ; only 

 in the larval stage sometimes lateral, serial pairs of bristle bundles are present. Larva 

 with a well-marked prostomial area, and a ciliate band, which is post-oral. The mouth, 

 lying at the fore-end of the body, is provided with tentacles into which the body-cavity 

 never penetrates, but only the vascular system ; in rare cases there are no tentacles. 

 Skin with numerous glands ; overlying the cerebral ganglion is often a pair of ciliated 

 tubercles. The long, tubular, alimentary canal is almost in all cases spirally rolled; 

 very seldom is it simply thrown into loops ; the anus is dorsal in position and far for- 

 ward. The front part of the body (introvert) is introversible by the action of retractor- 

 muscles ; anteriorly on the introvert are very generally present chitinous hooks. The 

 ccelomic fluid contains corpuscles. The closed vascular system encloses a corpusculated 

 fluid, and consists of one or two contractde sacs (hearts) — which accompany the 

 oesophagus and end blindly after a short course — and of the vascular ring and tentacular 

 vessels. The circulation of the blood is effected both by the contraction of the heart's 

 walls and by the action of ciliated cells ; in very exceptional cases there is no vascular 



