496 MR. p. W. BASSETT-SMITH ON [Apr. 18, 



(1) Tantpletjeus alcicoenis. 2 . 



Tanypleurus alcicornis Stp. & Liitk. Bidrag til Kundskab, 1861, 

 p. 425, pi. xy. fig. 30. 



Hosts : Cyclopterus spinosus, Scymnus microcephalus [Lsemargus 

 borealis]. Greenland. 



Family VII. LEEN^OPODID^. 



Adult female with the body robust, incompletely or not at all seg- 

 mented. The anterior antennae are small, springing from the inside 

 of the posterior ones, Avhich are generally two-branched. Mouth 

 conical, with a ciliated margin in which is seen the dentate slender 

 mandible. Maxillae curved, toothed, and free. First maxillipeds 

 large, as strong hook-like limbs. Second maxillipeds converted 

 into organs of attachment, sometimes long and slender, others 

 united throughout, or short and dilated, terminating in a fixing 

 apparatus. Thoracic limbs often totally suppressed. External 

 ovaries as dilated sacs. Grenerally a fixed parasite. 



Male pigmy, found on some portion of the female (head, arms, or 

 body). It is strikingly different and proportionately very small. 

 Articulate limbs more or less represented, but varying considerably 

 in diflPerent genera, and useful as a means of classification. 



G. 1. Thtsanote Kroyer. 



Oephalothorax not markedly attenuated, joining imperceptibly 

 with the body, which is dilated and flattened ; the second maxilli- 

 peds, like the hinder part of the body, giving rise to fimbriform 

 appendages. Abdomen minute. Anterior antennae slender, 

 articulate; posterior unciform. Second maxillipeds united at the 

 end. 



Male with distinct oephalothorax, and elongated segmented 

 abdomen. 



(1) Thysanote pom acanthi. 5 , 



Tliysanote pomacanthi Kr. Bidrag til Kundskab, 1863, p. 288, 

 pi. XV. fig. 1. 



Host : gills of Pomacanthus paru. "West Indies. 



(2) Thysanotb eimbeiata. $ . 



Brachiella fimbriata Heller, Eeise d. Novara, 18G5, p. 240, 

 pi. xxiv. fig. 2. 



Host : gills of Serranus sexfasciatus. Batavia. 



(3) Thysanotb lobitentris. 5 . 



Brachiella lohiventris Heller, Eeise d. Novara, 1865, p. 241. 

 pi. xxxiv. fig. 3. 



Host : gills of Bhypticus saponaceus. Brazil. 



