BARNACLES FROM DEEP-SEA CABLES. 289 



the two and has about 22 segments. The first cirrus is widely 

 separated from the second. 



Cirri 2-6. The remaining cirri are moderately stout and 

 long. Their anterior fringe is well developed though consisting of 

 rather short chaetae; the posterior armature consists of bunches of 

 fine hairs, of which the longest is about equal in length to the 

 segment, attached to the upper extremity of each segment. Ex- 

 cept at the extremities of the rami, each segment is ornamented on 

 its anterior half by several sloping, sinuous lines constituted by an 

 internal thickening of the cuticle. 



Anal appendages. These are flattened from before backwards 

 ■and expanded. They consist of a single leaf -like segment devoid 

 of all armature except a very minute and scanty pilosity. The 

 outer margins are strongly concave, the inner a little sinuous. The 

 tips of the appendages do not reach as far as the upper end of the 

 basal segment of the peduncle of the sixth cirri. 



Penis. The penis is long, rather broad but compressed lateral- 

 ly, strongly and closely annulate, pointed, armed only with soft 

 fine hairs. 



Mouth-Parts. 



Labrum. The labrum is by no means large and not at all 

 Dullate. It has a sharp chitinous edge posteriorly but no teeth. 

 The palps are rather short and stout. 



Mandible. The mandible is broad and has a large number of 

 teeth, but, as is usual when it takes this form, is probably variable. 

 In the specimen examined the biting margin is almost straight and 

 bears five main teeth, of which the outermost, the 4th and 5th are 

 subequal and larger than the 2nd and 3rd. Between the 1st and 

 2nd, 2nd and 3rd and 3rd and 4th there are smaller subsidiary 

 teeth. Of these the first is the largest and the third much the 

 smallest. The inner angle, which projects very little beyond the 

 hase of the 5th tooth, is asymmetrical. Xone of the teeth are 

 pectinate and the whole appendage is practically naked. 



Maxilla. This appendage is rather broad. The outer chaeta 

 is very stout and is followed by a rather deep but short quadrate 

 ■excavation. There is also a small notch on the margin about half 

 way between the excavation and the inner angle. The marginal 

 hristles are numerous and long but delicate. There is a fringe of 

 fine hairs running almost parallel to and at some distance from 

 the margin on the posterior surface of the appendage. 



Outer maxillae. The form of these appendages is normal. 

 The sensory organ connected therewith is situated on a rounded 

 papilla. 



Accessory Male. 



There are four accessory males attached to the capitulum of 

 the hermaphrodite just below the orifice, but only one of them 

 appears to be mature. It possesses a well differentiated capitulum 



JR. A. Soc, No. 74, 1916. 



