of the Fishery Board for Scotland. 211 



In the female the width of the posterior segments decreases gradually 

 instead of abruptly. 



The antennules of the male are modified to form powerful grasping 

 organs, as shown in the drawing (fig. 2). 



The distribution of this curious species appears to be local rather than 

 rare, and since its discovery in the crevices of decaying fragments of 

 wood, its occurrence in similar situations has occasionally been noticed 

 both in the Firth of Forth and the Firth of Clyde, and it may probably 

 be found in such situations round other parts of our shores. 



Genus Laophontodes, T. Scott. 

 Laophontodes typicus, T. Scott. PI. xiii., figs. 6-15. 



1894. Laophontodes typicus, T. Scott, Twelfth Annual Report of 

 the Fishery Board for Scotland, Pt. III., p. 249. PI. viii., 

 figs. 2-8. 



It is thirteen years since a description of this species was first 

 published in the Board's Twelfth Annual Report. The description was 

 prepared from female specimens, the male being at that time unknown ; 

 and as, so far as I know, it has not yet been recorded, the following 

 observations on its structure, with some additional remarks on the female, 

 will render the former description more complete. 



This species, like the last, is very small, the largest of our female 

 specimens is scarcely *5 millimetre (about -^ of an inch) in length, while 

 the males are only about one-sixtieth of an inch ; they may therefore be 

 easily overlooked. 



In both the male and female the body is elongated and narrow, and is 

 considerably depressed (fig. 6). The male, though smaller than the 

 female, does not differ much from it in general appearance. 



The anterior antennae in the male are composed of the same number of 

 articulations as those of the female, but the last three joints are 

 considerably modified, as shown in the drawing (fig. 7). The third joint 

 is small, the next is dilated and gibbous, while the last forms a slender 

 hook-like process. 



The mandibles are very small, and the biting-edge is armed with a 

 few prominent teeth. The mandible-palp consists of a single small one- 

 jointed branch bearing several setae (fig. 8). 



The maxillae are similar to the same organs in typical species of 

 Laophonte, and consist of a broad masticatory lobe provided with 

 several elongated slender spines, and a small bilobed palp (fig. 9). 



The first maxillipeds are small but moderately stout, and the basal 

 joint, which is somewhat dilated, is provided with a small setiferous 

 process on the inner margin, while the end joint terminates in an 

 elongated and moderately strong claw (fig. 10). The second maxillipeds 

 are as previously described. 



The first pair of thoracic feet are in structure nearly as in Laophonte, 

 the inner branch being short and three-jointed, while the outer, which is 

 two-jointed, is stout and furnished with a strong tejmiiial claw (fig. 11). 

 The second pair, like the first, is somewhat similar in the two sexes ; 

 the outer branch is slender and elongated and composed of three sub- 

 equal joints, while the inner is short and two-jointed ; the first joint of 

 the inner branch is extremely small, but the second, though very slender, 

 is of moderate length and furnished with t\^o slender apical setae. The 

 third pair in the female is similar in structure and armature to the 

 second, but the inner branch of this pair in the male has two peculiar 



