164 Leucothoe 



Peraeopods 3 — 5 subequal and similar. Uropod 2 much the shortest. 

 üropod 3, peduncle long, rami lanceolate, miuutely spinulose., Telson 

 triangulär, long, unarmed. 



Frequently lodged in tuuicates or sponges. 



11 species accepted, 7 doubtful. 



Synopsis of accepted species: 



Gnathopod 1, finger serrate 1. Ij. traillii p. 164 



Gnatliopod 1, finger sniooth — 2. 



Antenna 1 in cJ, basal Joint very tumid ... 2. L. pachycera . . . p. 164 

 Antenna 1 in (5, basal Joint not very tumid — 3. 



Mandibular palp extremely short 3. L. miersi p. 165 



Mandibular palp moderately short — 4. 



Pleon segment 3, postero- lateral angles not 



incised — 5. 

 Pleon segment 3, postero-lateral angles incised — 9, 



Antenna 1, 3d Joint not half length of 2d — 6. 

 Antenna 1, 3d Joint half length of 2d — 8. 



j Gnathopod 2, 6*^ Joint irregularly denticulate . 4. L. farina p. 165 



\ Gnathopod 2, 6th Joint regularly denticulate — 7. 



Eyes red 5. L. spinicarpa . . p. 165 



Eyes black 6. L. commensalis . p. 166 



f Gnathopod 1, 6th Joint widest at base .... 7. L. tridens . . . . p. 166 

 \ Gnathopod 1, 6tli Joint narrowest at base ... 8. L. brevidigitata . p. 167 



Gnathopod 1, 5th Joint, inner margin smooth . 9. L. richiardii . . . p. 167 

 Gnathopod 1, 5tli Joint, inner margin serrate — 10. 



{ 



10 



{ 



/ 

 \ 



{ 



{Telson twice as long as broad 10. Ii. incisa p. 167 

 Telson not twice as long as broad 11. L. lilljeborgii . . . p. 167 



1. L. traiim G. M. Thoms. 1882 L. t, G. M. Thomson in: Tr. N. Zealand Inst., 

 V. 14 p. 234 t. 18 f. la— d | 1893 L. spinicarfa (part.), A. DellaValle in: F. Fl. Neapel, 

 V. 20 p. 652. 



Body rather slender. Eyes rounded, large. Antenna 1, 1^* Joint stout, 

 2^ subequal, slender, flagellum 4-jointed(?). Antenna 2, peduncle rather longer 

 tbanthatof antenna 1, flagellum 5-jointed, shorter tban ultimate Joint of peduncle. 

 Mandibular palp very slender. Gnathopod 1, process of 5**^ Joint about ^g length 

 of 6*^ Joint, apex acute, finger curved, about Ys length of 6*^ Joint, inner 

 margin finely seiTate. Gnathopod 2, 5*^ Joint produced to Ys length of 6*^ 

 and ending in a curved spine, 6*** large, oval, with numerous dentations, 

 finger half as long, Peraeopods slender, 3 — 5 with 2*^ Joint wide, crenate 

 on bind margin. üropods 1 — 3, rami narrowly lanceolate," nearly smooth. 

 Telson naiTOw, tapering to a subacute, entii'e apex. Integument rather thin, 

 semi-transparent. L. 9 mm. 



Port Pegasus and Paterson Inlet [New Zealand]. Depth 9 — 18 m. 



2. L. pachycera DellaValle 1893 L.p., A.DellaValle in: F. Fl. Neapel, «7.20 

 p. 651 1. 19 f. 22, 23, 29—34. 



Pleon segment 2, postero-lateral angles not acute, in segment 3 incised, 

 with upturned acute angle. Antenna 1 in (5, 1^* Joint very tumid, ellipsoidal, 

 2*^ widening from naiTow base, distally truncate, flagellum 7-jointed. Antenna 2 

 slender, flagellum 5-joiuted. Gnathopod 1, process of 5^'* Joint irregularly 

 serrate, uncinate at apex. Gnathopod 2, 2*^ Joint narrow at base, 6*^ elongate, 



