4 DISCOVERY REPORTS 



A new, most peculiar species is described as Russellia rnirahilis ; it does not merely represent a new 

 genus, but a new family of Anthomedusae. 



Four diiferent species of commensal larvae of Narcomedusae of more or less doubtful affinity are 

 also described. 



Many species were found in localities far away from their previously known areas of distribution. 

 The Discovery collection, therefore, is of great importance from the point of view of distribution. 

 The systematic account of the species is followed by a zoogeographical discussion, 



ABBREVIATIONS 



WS: collected by R.R.S. 'William Scoresby'. 



MS: collected from the Marine Station on South Georgia. 



St. without addition: collected by R.R.S. 'Discovery' and R.R.S. 'Discovery 11'. 



B oblique haul Symbols used for nets, etc. 



H horizontal haul. 



V vertical haul. 



(-o) indicates that the net failed to close at the required depth and was fished to the surface. 



Unless specially noted to the contrary, nets N 200 and N 450 were towed horizontally. 

 BNR Russell's bottom tow-net; a 100 cm. net on a frame attached to skids which raise it clear of the bottom. 

 BTS Small beam trawl; mesh at cod-end | in. (12-5 mm.). 

 DLH Large dredge; light pattern, 4 ft. in length (1-2 m.). 

 DRR Rectangular dredge bag bent on to a Russell frame with skids. 



.j^ __ ■ Nets with mesh of 4 mm. or 7 mm. attached to back of trawl. 



N 50 50 cm. tow-net; mouth circular, 50 cm. in diameter; 200 meshes to the linear inch. 



N 70 70 cm. tow-net; mouth circular, 70 cm. in diameter; mesh graded, at cod-end 74 to the linear inch. 



N 100 I m. tow-net; mouth circular, i m. in diameter; mesh graded, at cod-end 16 to the linear inch. From i July 



1927 the cod-end made of stramin with 11-12 meshes to the Hnear inch. 

 N 200 2 m. tow-net; mouth circular, 2 m. in diameter; mesh graded, at cod-end 4 mm. 

 N 450 4I m. tow-net; mouth circular, 4^ m. in diameter; mesh graded, at cod-end 7 mm. 

 NCS-D Tow-net of coarse silk, with 16 meshes to the linear inch, attached to dredge. 

 NCS-T Same attached to back of trawl. 

 NH Hand net. 



NRL Large rectangular net; frame 2-45 x 07 m., with bag of | in. mesh (12-5 mm.). 

 NS Seine net; length 55 m. ; mesh at cod-end i\ in. (3-8 cm.). 



OTC Commercial otter trawl; head rope 24-5 m. ; mesh at cod-end li in. (3-8 cm.). 

 RM Mussel rake. 

 TYF Young-fish trawl; mouth about 20 ft. in circumference (6 m.); bag of stramin with 11-12 meshes to linear 



inch. Fished until July 1926 with poles and otter-boards, thereafter attached to a circular tow-net frame 



2 m. in diameter. 



SYSTEMATIC ACCOUNT 



ANTHOMEDUSAE 



Family CORYNIDAE 



Sarsia gracilis Browne 1902 

 1902 Sarsia nracilis Browne, p. 275. 



1939 Sarsia gracilis Browne & Kramp, p. 271, pi. 14, figs. 1-2, pi. 15, fig. i. 



Occurrence: St. 91. 8. ix. 26. \ mile off Roman Rock, False Bay, South Africa. Net: NCS-NRL, 35 m. 

 r specimen. 



