50 



This genus includes two species: A. steenstrupi and A. stebbingi. 

 The latter is known from a single specimen, very briefly described and 

 schematically (total outline) illustrated by Woltereck. Thus the species 

 validation of A. stebbingi is doubtful. 



1. Archaeoscina steenstrupi (Bovallius, 1885) (Fig. 3) 



Bovallius, 1885a: 2 (Mimonectes), 1887a: 558 (Mimonectes); Step- 

 hensen, 1923: 7 (Mimonectes, part.); Stephensen and Pirlot, 1931: 534 

 (Micromimonectes); Virlot, 1939: 18; Vinogradov, 1956: 200. — bonnieri 

 Stebbing, 1904; 19; — irene Woltereck, 1906a: 190 (Micromimonectes); 

 Barnard, 1932: 250. — typus physosoma Woltereck, 1906a: 191 {Micro- 

 mimonectes). 



Sexually mature females 3.5-4.0 mm long, males 2.5-3.5 mm long. 

 The peduncle of antennae I is nearly equal in length, or shorter than 

 the broad proximal segment of the flagellum; the three distal segments 

 are comparatively well developed and together nearly equal to half the 

 length of the proximal segment; the 3rd distal segment is longer than the 

 two preceding segments together, with two apical setae, equal in length. 

 Antennae I in males are longer (almost equal to the first three somites 

 of the pereon in length and, together with the apical setae reach up to 



45 pereon somites IV-V) and narrower than in females; the proximal seg- 

 ment of the flagellum is 2.0-2.5 times longer than the peduncle; the distal 

 segments are small, their total length 1/5-1/4 of the proximal segment; 

 the 3rd distal segment is nearly equal to the 2nd, and apically bears 

 two setae. Antennae II are shorter than antennae I; in females they are 

 six-segmented; the 4th segment is conical and the longest, equal to the 

 2nd and 3rd together, and three times longer than the 5th and 6th seg- 

 ments together; the 6th segment has one long apical seta. Antennae II in 

 males are seven-segmented, almost two times longer than antennae II in 

 females. 



The structure of the mouthparts and pereopods is similar in both 

 sexes. The mandibular palp is much longer than the mandibular body, 

 with a thin, curved 3rd segment somewhat larger than the two preceding 

 segments together. Maxillae I have a weak palp, comparatively narrow 

 outer lobes, and narrow apically rounded inner lobes. The inner lobes 

 of maxillae II are broader and shorter than the outer; the outer lobes 

 have two apical setae and the inner lobes three short stiff setae. The 



46 maxillipeds have an oval unarmed outer lobe, the distal part of its inner 

 margin being denticulate; the inner lobe is small. 



In pereopods I the 5th segment is almost not enlarged distally and the 

 6th segment equally long and transversely oval; the claw is not attached 

 apically but distally on the posterior margin, and is strong and straight. 

 Pereopods II are longer and thinner; their 5th segment is shorter than the 

 transversely oval 6th segment and the claw is terminal. Pereopods III 



