CRUSTACEA MALACOSTRACA. 11. 05 



Distribution. Lilljeborg established L. brcviremts on specimens taken at Bohuslan, 50—60 

 fathoms, and at Molde (the western coast of Norway, at Lat. 62°45' N.), 40— 50 fathoms. vSars possessed 

 it from Christiania Fjord, 20—60 fathoms, and from several places on the South and West coasts of 

 Norway, northwards to Kvalo, at Lat. 70^40' N. In 1910 I mentioned it from two places in the Kattegat, 

 15 and 17 fathoms and from a place in Skager Rak, 125 fathoms. Besides the species has been taken 

 between Norway and the Orkne\s, 150 fathoms (Internat. Investig.), at some places on both sides of 

 Scotland, f. inst. near Aberdeen, 45 fathoni.s, and in Loch Fyne pelagically in a vertical haul (T. Scott), 

 furthermore off Northumberland (G. S. Brady), at Plymouth (A. M. Norman) and off West Ireland, 320 

 fathoms (Tattersall). 



The perusal of the preceding lines and of the "Ingolf" stations shows the bathymetrical occur- 

 rence to be extremely remarkable. In vain I have attempted to find any difference worth mentioning 

 between females from 1870 fathoms in the warm area, from 1003 fathoms in the cold area and Nor- 

 wegian specimens from 20 — 60 fathoms presented by Sars. To begin with I had believed that the 

 specimens from the "Ingolf" belonged to a species different from the L. brevircmis occurring at Den- 

 mark and Norway, bui after a detailed examination I was forced to abandon that opinion, as I could 

 not find any other difference than that the uropods seem to be a little longer and sixth abdominal 

 segment a little less highly vaulted in the Norwegian specimens (fig. 3 c) than in specimens from the 

 deepest "Ingolf" stations. 



60. Leptognathia crassa n. sp. 

 (PI. IX, figs. 4a — 4e.) 



Female (without marsupium). Body uncommonly robust (fig. 4a), from four and a half to 

 slightly more than five times as long as broad, seen from above subcylindrical, with the abdomen 

 slightly narrower than the thorax and the lateral margins of tlie thoracic segments slightly convex. 

 — Carapace a little shorter than the two following segments combined (fig. 4 a), slightly broader than 

 long and at the anterior end about half as broad as a little from the base; frontal process feebly 

 developed, short, broad, acute. 



Antennulse (fig. 4 b) only a little shorter than the carapace, thirst joint a little shorter than 

 the other joints combined, robu.st, not fully twice as long as deep and somewhat produced above; 

 second joint thick, distally much produced above, with the upper margin as long as the depth of tlie 

 first joint; third joint with the upper margin very short; fourth joint slightly shorter than the upper 

 margin of the second, slender and subcylindrical, with the terminal setae somewhat long. — Antennae 

 with fourth and fifth joints completely fused, and this fourtli joint only half as long again as the 

 penultimate joint. 



Chelipeds robust (fig. 4b). Basal joint thick, with the free hind margin of the posterior pro- 

 tuberance reaching to second thoracic segment. Carpus somewhat longer than the basal joint, ovate, 

 somewhat or considerably less than twice as long as deep, with the free lower margin distincth-, the 

 upi)er margin strongly convex. Chela slightly longer than the carpus, somewhat more than twice as 

 long as broad; the hand with two strong sette on the posterior margin at the base of the movable 

 finger and its anterior margin only a little longer than the movable finger. 



