434 LEANIRA HYSTRICIS. 



distinct whorls of spikes at the end of the shaft, and the basal division of the terminal 

 process is broader than the latter. 



The ventral cirrus is slender and subulate, and the tip extends beyond the fleshy 

 part of the foot. 



Reproduction. — The species is a female with a few ova, the majority probably 

 having escaped either before or after capture in July. 



This seems to be a deep-water species. It is named in honour of the late Prof. G. 

 Busk, whose patient and accurate investigations in various groups are so well known, 

 and whose genial interest in many a young worker in science will long be gratefully 

 remembered; 



An allied form is the Sigalion Edwardsi of Kinberg 1 (1858), from the Atlantic — off 

 La Plata. 



Genus XXVII. — Leanira, Kinberg, 1857. 



Anterior border of the head fixed to the bases of the feet above the palpi, furnished 

 with a somewhat slender median tentacle, usually with a short process at each side of 

 the base ; lateral tentacles minute ; tentacular cirri unequal. 



Scales not covering the dorsum anteriorly, smooth. Ciliated pads (ctenidia) along 

 the dorsal arch above the feet. Dorsal lobe of the foot rather more prominent than the 

 ventral, papillose, and with long spinous bristles. Inferior division has compound 

 subulate bristles, with the tapering terminal region pectinate-canaliculate. Branchiae 

 commence in front, and are attached to the scale-peduncle on the dorsum of each foot. 

 Nerve-cords somewhat flattened or ovoid in section, and the area covered by the oblique 

 and vertical muscles. Segmental organs as in the group. 



The genus was established by Kinberg in 1857, while Grube produced additional 

 features in his ' Annulata Semperiana.' 



V. Carus, again, 2 includes Leanira under Sthenelais, but does not allude to the 

 condition of the bristles. 



Leanira hystricis, fflilers, 1874. 



Specific Characters. — Head smoothly rounded. The awl-shaped median tentacle is 

 remarkably short and small. No eyes in the preparations. The anterior border of the 

 head is fixed to the bases of the feet above the palpi, which are long, tapering, and 

 smooth, with scoop-shaped lamellae at their bases. The foot above the palpus bears 

 three processes : superiorly a tentacular cirrus about a fifth the length of the palpus ; 

 inferiorly a minute organ of the same nature, extending only a short distance beyond the 

 peduncles ; and a minute awl-shaped process (lateral tentacle) attached to the base of 

 the peduncle superiorly. The body is small and slender, and between two and three 

 inches in length. Scales rounded, translucent, and perfectly smooth in outline and 



1 Op. cit., p. 30, Taf. 9, f. 41, &o. 



2 f Fauna Mediterranean (1884). 



