182 THE SCHIZOPODA. 
name Chalaraspis I follow Sars (Challenger Rept., p. 51). Willemoés-Suhm — 
left two figures of a species to which he had given the name Chalaraspis alata. 
The only specimen obtained by the ‘‘Challenger” had been lost, and therefore 
Sars described the genus and the species from the drawings made by Suhm. 
The drawings have been rendered as woodcuts by Sars; they were evidently 
somewhat imperfect or inaccurate in several particulars. The figures show the 
animal as having the carapace exceedingly large, covering the two anterior 
abdominal segments and the lateral part of third segment. Among the ‘“ Alba- 
tross”’ material I found specimens agreeing tolerably with Suhm’s figures in 
all main features excepting the relative length of the carapace, but as specimens 
of allied genera, Gnathophausia and Eucopia, sometimes are contracted to such 
a degree that the carapace covers two segments of the abdomen, no stress can 
be laid on the apparently very long carapace shown by Suhm’s drawings, as 
his specimen in all probability has been very much contracted. And Sars’s 
diagnosis of the genus agrees, so far as it goes, in the main with the description 
‘founded on my specimens. 
1. Chalaraspis alata WiLtLemoiis-Suum, MS. G. O. Sars. 
Plate 1, figs. la—1l. 
1885. Chalaraspis alata G. O. Sars, Challenger Rept., 13, p. 51. (Two text-figures). 
Sta. 4665. Nov.17,1904. Lat. 11° 45’ S., long. 86° 5.2’ W. 300 fms. to surface. 1 very young 
specimen. 
Sta. 4672. Nov. 21,1904. Lat. 13° 11.6’S., long. 78° 18.3’ W. Top of Tanner net, 400 fms. to surface. 
2 immature specimens (bad). 
Sta.4675. Nov. 22,1904. Lat. 12°54’S.,long.78°33’W. 300fms.tosurface. 1immaturespecimen. 
Sta. 4719. Jan. 14, 1905. Lat. 6° 29.8’S., long. 101° 16.8’ W. 300 fms. to surface. 1 male. 
Description — General aspect somewhat similar to that of Lophogaster.— 
The frontal plate somewhat short but very broad, with the anterior transverse 
margin straight or even slightly emarginate and the lateral angles broadly 
rounded (figs. la-lb). The carapace has the cervical groove not only deep 
but very curiously shaped; seen from the side (fig. 1b) the groove seems to be 
formed by two transverse furrows which unite laterally, while the anterior 
furrow is again dorsally bifid; on the side the furrow is bent and is far from 
reaching the lower margin of the carapace. A little more than the anterior 
fourth of the lateral margin of the carapace is hollowed in a peculiar way, and 
somewhat above the whole lateral margin a furrow runs from near the front 
to the hind margin. Between the antero-lateral rounded angles of the frontal 
plate and the cervical groove a pair of feeble longitudinal keels are seen (fig. la), 
and the area between these keels is feebly concave; a branchial groove is feebly 
developed, and rarely the posterior third of the carapace has the middle line 
