594 Microdeutopus, Lembos 



M. titii Heller 1866 M. t, Cam. Heller in: Denk. Ak. Wien, i'. 26ii p. 48 t. 4 

 f. 8 I 1893 M. t, A. DellaValle in: F. Fl. Neapel, v.20 p.420. 



Perhaps ideatical with M. damnoniensis (p. 593); but antenna 2 considerably longer 

 than antenna 1. L. 5 mm. 



Adriatic (Pirano). 



4. Gen. Lembos Bäte 



1855 [Subgen.] Gammaropsis (part.), W. Liljeborg in: Vetensk. Ak. Handl., 1853- 

 p. 455 1 1856 Lembos (nom. nud.) (part.), Bäte in: ßep. Brit. Ass., Meet. 25 p. 58 | 1857 L. 

 (part.). Bäte in: Ann. nat. Hist., ser. 2 v. 19 p. 142 | 1895 L., T.Stebbing in: Ann. nat. Hist., 

 ser. 6 u 16 p. 207 | 1859 Autonoe (part.), R. M. Bruzelius in: Svenska Ak. Handl., n. ser. 

 V.3 nr. 1 p.23 I 1888 A., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 1081 | 1893 A.r 

 A. Della Valle in: F. Fl. Neapel, v.20 p. 398 | 1894 Autonoe, G. O. Sars, Crust. Norway, 

 V. 1 p. 546. 



In general agreement with Aora (p. 587), also with well developed 

 flagella of antenna 1, but in gnathopod 1 of the ö the 4*^ Joint is not 

 elongate, the 5*^ and 6*^ joints are stout, subequal in width, strongly setose^ 

 and the palm of the 6^^ has tooth-like projections. In L. arcticus the maxilli- 

 peds have the outer plates exceptionally small. 



9 species accepted, 2 doubtful. 



Synopsis of accepted species: 



Without trace of eyes 1. L. longidigitans . p. 594 



Not without trace of eyes — 2. 



M 



Maxilllpeds, outer plates very short; peraeopods 



3 — 5, 2d Joint very narrow 2. L. arcticus . . . . p. 595 



Maxillipeds, outer plates not very short; peraeo- 

 pods 3 — 5, 2d Joint moderately narrow — 3. 



Ventral surface of peraeon armed with many spines 3. L. spiniventris . . p. 596 

 Ventral surface of peraeon not armed witli spines — 4. 



i Peraeopods 1 and 2 in (5 both having 4tli Joint 

 strongly setose 4. L. hirsutipes . . . p. 596 

 Peraeopod 1, but not peraeopod 2, in (5 having 

 i** 4tli Joint strongly setose 5. L. megacheir . . . p. 596 

 Peraeopods 1 and 2 in (J neither having 4th Joint 

 strongly setose — 5. 



(Gnathopod 1 in (J, 2d Joint densely setose at lower 

 hind corner 6. L. longipes . . . p. 597 

 Gnathopod 1 in (5, 2d Joint not densely setose at 

 lower hind corner — 6. 



/ Lower lip, hind processes very long; mandible, 



j spines of spine-row very numerous 7. L. philacanthus . p. 598 



6 ' Lower lip, hind processes of moderate length; 

 I mandible, spines of spine-row in moderate 

 l number — 7. 



Gnathopod 2, 2d Joint strongly dilated 8. L. kergueleni . . p. 598 



Gnathopod 2, 2d joint not dilated 9. L. -websterii . . . p. 599 



7 





1. L. longidigitans (Bonnier) 1896 Autonoe l., J. Bonnier in : Ann. Univ. Lyon, 

 t?.26 p. 659 t.40 f. 1 I 1899 Lembos l, T. Stebbing in: Ann. nat. Hist., ser. 7 v.3 p.350. 



Head without rostrum, lateral lobes not at all prominent. Side-plate 

 1 in d quadiiate. Pleon segment 3, postero-lateral corners much rounded. 



