REPORT ON THE ANNELIDA. 
o 
merit the name of lamellae (like those in the ruminant’s “ manyplies ”). The canal then 
bends upward (from the posterior pit) and forms a kind of pylorus, with thick walls 
and bold longitudinal furrows, and terminates in the intestine, into which the part freely 
projects lik e a long os uteri into a vagina. The thick rugose intestine, which agrees in 
structure with that in the ordinary Annelids, terminates in a dorsal anus, with two styloid 
processes, of the usual shape, at the sides interiorly. None of the specimens presented 
developed generative organs, which in the British examples from Herm are in full 
maturity in August. Claparede mentions that they originate at the bases of the 
feet. 
So far as structure shows, the animal would appear to evert its lingual organ and apply 
it with a rasping action to the surface of the sponge, the successive pieces being crushed 
against the firm rugose wall behind by the hardened posterior surface of the tongue, and 
again subjected to the action of the deeply folded or lamellar region behind it. Thus, 
before the (especially soft tissues like those of sponges) food reaches the intestinal surface, 
it has been partially disintegrated and fitted for absorption. Minute shells of Spirorhis 
are of course less affected, though many are broken into fragments, and all are in a 
condition to give up their contents. Like the British Euphrosyne foliosa at Herm, the 
South African form would seem to browse on the patches of Halichondria and other 
sponges which abound under stones between tide-marks ; and there is little wonder 
therefore that there should be so many interesting homologies between its buccal 
apparatus and that of such Nudibranchs as Doris tuberculata and Doris johnstoni, which 
follow precisely similar habits. 
Euphrosyne borealis, (Ersted (PI. I. figs. 2, 3 ; PI. Ia. figs. 4-6). 
Euplirosyna horealis, CErsted, Gronl. Ann. Dorsibrancli., p. 18, Tab. II. figs. 23-27. 
Euphrosyne horealis, Auctorum. 
Habitat. — A small example apparently referable to the foregoing occurred at Station 
49 (off Halifax), May 20, 1873, lat. 43° 3' N., long. 63° 39' W.; depth, 85 fathoms; 
bottom temperature 35°’0, surface 40°‘5 ; gravel and stones. 
Observations, — The specimen agrees in external appearance with the Norwegian form 
— the smooth dorsal bristles projecting far beyond the branchise, and giving the back a 
very hirsute appearance. The serrated bifid dorsal bristles (PL Ia. fig. 4) are strongly 
marked ; and it is to be observed that when viewed antero-posteriorly they are also bent 
laterally. The ventral bristles present rather an elongated tip beyond the spur, and the 
edge above the latter is often marked by a series of irregularly placed serrations — two 
varieties being shown in PL Ia. figs. 5, 6. Each of the processes at the tip has its 
internal canal. Some of the stronger bristles have the terminal portion less bent than 
