FLORAL TAILS 333 



Anihura, gracilis (Montagu) was first found on the 

 coast of South Devon. Anthura tenuis (Harger) is a 

 closely allied species found in the United States. The 

 New Zealand species Anthura fiagellata, Chilton, was 

 included in the genus with hesitation, owing to the mis- 

 description in the 'History of the British Sessile-eyed 

 Crustacea,' in which the uropods are said to be attached 

 to the fifth instead of the sixth segment of the pleon. 

 Paranthura Gostana, Bate and Westwood, should be called 

 Paranthura nigropunctata(L\ica.a). ' Anthiira gracilis,' Milne- 

 Edwards, though agreeing with this species in the shape 

 of the telson, has the first five segments of the pleon fused 

 as in Anthura. Calathura brachiata (Stimpson) has been 

 traced ' from the east coast of America, across the Atlantic, 

 between Shetland and Faroe, off Norway, Scotland, and 

 Ireland, and between the south of England and the Bay 

 of Biscay.' It has been taken as deep down as 1,360 

 fathoms. It is well marked by a dorsal impression on the 

 fourth, fifth, and sixth segments of the perseon, and by 

 the great size, attaining a length of one inch and an eighth. 

 It is the largest known species of the family. 



Gyathura carinata (Krijyer) has been described under 

 various names from the coasts of the United States, and 

 from Denmark, but not hitherto from any part of Great 

 Britain. 



Anthelura ahyssorum,, Norman and Stebbing, dredged 

 by the Valorous, justifies its name by the depth of 1,750 

 fathoms from which it was obtained near the entrance of 

 Davis Strait. Hyssura producf-a, of the same authors, 

 refers in the generic name to the spear-shaped telson and 

 in the specific to the linear form of the animal. Many of 

 the generic names in this family refer to the peculiar cup- 

 shaped or calyx-like arrangement of the caudal fan. 

 Gruregens, 'leg-wanting,' alludes to the retention of a 

 larval character in the absence of the last pair of pereeo- 

 pods. Gruregens fontamis, Chilton, is the only known 

 species in this family that is not marine. Mr. Charles 

 Chilton obtained it from a well of fresb water at Eyreton 

 in New Zealand, together with four other n6\V subterra- 



