Oatiy Marine Laboratory ^ St. Andrews. 381 



cheilus minutus, Grube*, first found in tlie Adriatic in 17-35 

 fathoms by its discoverer. It was procured on a valve of 

 jPec^en entangled by a trammel-net on the ground off Fermain 

 Bay, Guernsey, and also between tide-marks at Herm. In 

 this the head is furnished with two well-marked though not 

 long tentacles and two brownish-red ocular bands which form 

 an inverted /\ by union in front. The body is about | of an 

 inch in length, is somewhat fusiform, resembling a miniature 

 Scalibreyma, slightly tapered anteriorly and more so poste- 

 riorly, the surface being minutely tessellated and marked by 

 transverse furrows. It is flanked by a scries of short fool- 

 lobes, with rather long tufts of pale resplendent bristles. 

 Posteriorly it terminates in an anal segment provided with 

 five slender cirri. The body has a uniform dull brick-red 

 colour or very pale brownish red, more deeply tinted on the 

 dorsum here and tiiere from the blood-vessel. The mouth 

 opens on the under surface of the peristomial segment as a 

 broad /N. in the spirit-preparation, the angle directed forward. 



The first segment is achetous. The second has dorsally a 

 foot-papilla bearing simple bristles, ventrally a papilla 

 holding a series (five or six) of stout simple bristles finely 

 tapered at the curved tip, though sometimes more or less 

 abraded. De St. Joseph associates these with the making 

 of its galleries in shells, just as in the case of the powerful 

 hooks on the fifth segment of Polydora. Their function, 

 whatever it may be, is certainly important, and they are 

 moved by special muscles. They are brownish by trans- 

 mitted light and have no longitudinal stria?. The next and 

 succeeding segments have simple curved bristles of a fine pale 

 golden sheen on the dorsal and ventral papillae, which vary 

 somewhat in the different parts of the body, forming shorter 

 cones in front, longer posteriorly. At the base of these 

 bristles and just projecting beyond the skin is a series of bitid 

 forms, one limb of the fork being longer than the other, and 

 the inner edge in both limbs is spinous. Towards the 

 twenty-second segment a slender cirrus, about a third the 

 diameter of the body at its longest, appears below the ventral 

 papilla. According to De St. Joseph its tip is furnished with 

 palpocils in life. 



This is a southern type so far as present examples go, but 

 it may yet be found on the western shores. It may have 

 been overlooked from its small size and obscure habits. It 

 bores actively with its snout amongst the mud. 



* Arcb. f. Naturges. xxix. i. p. 50 (18G3), ami ' Die Insel Liissiu u. 

 ihre Meeresfauna,' p. 85. 



