28. Anchialina typica Kröyer. PI. VII, figs. 2a — ik. 



1SÓ1. Ancliialus typicus Kröyer, Naturh. Tidsskr. 3 Ra;kke B. I, p. 53, Tab. II, fig. y,a — /. 



Stat. 16. March 15/16. Lat. 6°59'S., long. II5°24'.7E. Bay of Kankamaraan, S. coast of 



Kangeang. 22 m. HENSEN vertical net with electric light. 9 specimens. 

 Stat. 35. March 28. Lat. 8°o'.3 S., long. n6°S9'E. 13 10 m. Plankton, surface. 6 specimens. 

 Stat. 37. March 30/31. Sailus ketjil, Paternoster-islands. 27 m. and less. Plankton, surface. 



1 specimen. 



Stat. 40. April 2. Anchorage off Pulu Kawassang, Paternoster-islands. 12 m. 30 specimens. 

 Stat. 99. June 28/29/30. Lat. 6° 7'. 5 N., long. I20°26' E. Anchorage off North-Ubian. 16 — 23 m. 



Plankton, surface. 4 specimens. 

 Stat. 106. July 4. Anchorage off Kapul-island, Sulu-Archipelago. 13 m. Plankton. 3 specimens. 

 Stat. 109. July 5/6. Anchorage off Pulu Tongkil, Sulu-Archipelago. 13 m. Plankton. 3 specimens. 

 Stat. 142. August 5/7. Anchorage off Laiwui, coast of Obi Major. 23 m. HENSEN vertical net 



with electric light. 5 specimens. 

 Stat. 315. February 17/18. Anchorage East of Sailus Besar, Paternoster-islands. Plankton. 



2 specimens. 



Description. - It is so closely allied to the species represented by G. O. Sars as 

 A. typica, but two years before described by him as A. trtincata, that it may be useful to refer 

 to his figures for comparison.- Carapace as in A. truncata excepting the frontal plate; this plate 

 (fig. 2a) is shorter than in A. truncata, with the anterior margin distinctly emarginate which 

 is due to the fact, that the postenor part of the plate is somewhat concave and curved a little 

 downwards, while a short anterior part is bent downwards so strongly, that it is invisible from 

 above, the visible anterior margin being formed by the limit between this short, deflexed part 

 and the remainder of the concave plate. Eyes of very moderate size, dark brownish and as 

 broad as the end of the stalk, which is subcylindrical and about as broad as, or a little broader 

 than, the length of its anterior margin. Antennulae and antennal squama as in A. truncata. 



Gnathopods in the male (fig. 26) nearly as in A. truncata-, second joint extremely large, 

 broader than long, with the front margin very long; fifth joint gradually somewhat expanded 

 on the inner side from the base to a little before the end, so that a nearly rectangular corner 

 protrudes a little behind the insertion of the sixth joint, and the margin between the insertion 

 and the corner is somewhat concave; sixth joint not widened. Gnathopods in the female (fig. 2/) 

 simple. First pair of thoracic legs in the male (fig. 2 c) with the distal part of the endopod 

 very different from that in the other species: sixth joint somewhat widened, undivided, distally 

 a little obliquely truncated (figs. 2 c and 2ci) with 6 terminal, very long, thick and curiously 

 built setae, 2 of which are in the main covered by the 4 others; seventh joint (fig. 2ci, 7) small, 

 but yet larger than that of the following legs, oblong, and when seen from below covered by 

 the setae mentioned. In the female (fig. 2g) the sixth joint is normal, much more slender, without 

 aberrant setae and divided into 3 subjoints. Fig. 2 e shows the terminal part of second pair of 

 legs (in the male); sixth joint is divided by 2 articulations, and seventh joint is very small. 



Lateral wings of first abdominal segment in the female nearly narrowly rectangular, 

 about two and a half times as long as broad, with the outer margin nearly straight and the 

 angles rounded. The plate-shaped four posterior pairs of female pleopods nearly two and a 

 half times as broad as long. Pleopods in the male with the pseudobranchial lamellae somewhat 



