the Schizopods collected hy the ' Oceana.^ 9 



A single specimen of this species occurred in each of two 

 hauls — 6^, fishing from 560 fathoms to the surface^ and 4 h, 

 fishing from 1470 fathoms to the surface. It is evidently 

 one of the few known oceanic or strictly pelagic Mysids. 



Gnathojihausia drepanephora, H. & T. 



This is the second of the new forms discovered by 

 Mr. Murray. Descriptions and figures of this species have 

 already appeared. The figure is reproduced and a brief 

 diagnosis is given below. It belongs to a new section of 

 the genus Gnathophausiu, which may be described as 

 follows : — 



Genus Gnathophausia, Willemoes-Suhm. 



(Trans. Linn. Soc. Loud. ser. 2, Zool. vol. i.) 



Section 4"^. 



Infero-posterior corners of carapace produced into a spine. 

 Dorsal keel inteiTupted ^interiorly. Supraorbital spine 

 small. Antennal scale not jointed at apex. First thoracic 

 legs with distinctly developed exopodites. Epimeral plates 

 of last segment not united on the ventral face. 



Gnathophausia drepanephora, H. & T. (PI. II.) 



Form of body slender. Carapace not very large ; dorsal 

 spine about as long as first segment of pleon ; infero-posterior 

 corners produced into a spine, bluntly serrulate on ventral 

 edge^ nearly reaching fourth segment of pleon ; upper lateral 

 keel present; dorsal keel unarmed; cervical sulcus rather 

 distinct ; rostrum elongate and slender_, as long as the cara- 

 pace without the infero-posterior spines, distinctly denticulate 

 on all three edges; supraorbital and antennal spines well 

 defined, but small. Branchiostegal projections of moderate 

 proportions, but distinctly pointed. Anterior segments of 

 pleon without dorsal spines ; epimeral plates produced poste- 

 riorly into pointed lappets. Eyes very narrow, cornea 

 scarcely at all expanded, pigment (as preserved in formol) 

 rather pale brown. Outer flagellum of antennule in male 

 expanded and flattened at the base, which is beset on the 

 inner side with a brush-like fringe of fine curling set^. 

 Antennal scale of moderate size, about four times as long as 

 broad, tapering distally and very obliquely truncate ; inner 

 angle produced into a sharp point, outer edge with (about) 

 three denticulations distally. Telson large and massive, 

 * In sequence to Sars's Sections 1-3. 



