692 MR. H. G. JACKSON ON THE 



Distribution. Litycha ; Alaska ; California ; British Colombia. 

 (See Richardson (1905) for complete list.) 

 Figures in Richardson (1905). 

 This species is nearly related to the foregoing. 



3. LiGiA GLABRATA Brandt. (PL I. fig. 5 ; PI. II. fig. 6.) 



Ligia glabrata Budde-Lund (1885), p. 263. 

 '^^Ligia dilatata Collinge (1920), p. 475, 



Female specimen described. 



Length \Z ram.. Breadth Q Tara. (Another imperfect specimen 

 measured 19 mm. by 9 mm.) 



Surface very slightly granulated or nearly smooth. Eyes 

 of small size, separated by about one and one-half times their 

 horizontal length. Antennoi of moderate length ; flagellum 

 reaching as far back as hind border of 5th thoracic somite, 

 peduncle to hind border of 2nd segment ; flagellum with 15 

 to 17 slightly setose, short, and squat segments. The coxal 

 plates are divided by deep grooves on the 2nd, 3rd, and 4th 

 thoracic somites. Abdomen not abruptly contracted. Telson 

 arcuate ; postero-lateral processes blunt and little produced ; 

 accessory processes almost obsolete. Month-jJarts : 2nd maxilla 

 not bilobed, though a crease indicates the usual division ; without 

 hairy bristles on inner side. Maxillipede with 1st and 5th joints 

 of palp distinct ; remainder only indicated by deep marginal 

 indentations. Peroiopods typical in form. Uropods 4'5 mm. 



Distribution. Cape of Good Hope ; Table Bay. 



Collinge (1920) surmises that L. glabrata is possibly an 

 immature form of L. dilatata. These specimens are, however, 

 undoubtedly mature, and must be identified with the former of 

 Brandt's species. I have seen no male of this species. 



4. Ligia occidentalis Dana. (PI. II. figs. 7 & 8.) 



Ligyda occidentalis Richardson (1905), p. 681 {q. v. for 

 synonymy). 



Male specimen described. 



Length 25 mm. Breadth 11 mm. 



Surface minutely granulated. Eyes large and quadrangular, 

 and separated by less than the horizontal length of one eye. 

 Antennce moderately long and slender ; flagellum reaching as far 

 back as hind border of 6th thoracic somite, peduncle to hind 

 border of 2nd. Flagellum with 22 long and slender segments. 

 Division of coxal plates lightly marked on all thoracic somites. 

 Abdonen not abruptly contracted. Telson very obtusely tri- 

 angulate ; postero-lateral processes are as long as or longer than 

 median process ; accessory processes very small. Moitth-jmrts : 

 2nd maxilla weakly bilobed, with no hairy bristles ; maxillipede 

 with five distinctly marked joints. Propodus of 1st perceopod 

 with prominent process on inner side of distal end, which projects 

 forwards by the side of the dactyl. Cai'pus and merus of 1st and 



