1734 



THE VOYAGE OF H.M.S. CHALLENGER. 



in beneath the body forming a pouch in which the 

 fertilised eggs and young attain their development. In 

 the Caprellidaj they appear only on the third and fourth 

 segments. Rudiments of them are said to be occasionally 

 found in male Amphipods. 153, 185, 321, 418, 502, 522, 

 558, 1621. 



Insecta, 62, 65, 92. 



Integument, 290. See Cuticle, Epithelium. 



Internal structure, 290, 315. 



Intestine, that part of the alimentary canal which extends from 

 the pyloric end of the stomach to the anus, 489, 504, 562, 

 598. 



Intiraa, 489, 504. 



Ionelles, so called from lone, one of the genera included, 105. 



Ischiopodite {lax^ov, the socket in which the thigh-joint, p-rtpos, 

 turns, and irovs, a foot), the third (second free) joint of 

 the leg; the equivalents are — second joint, third joint, 

 knee, trochanter, second trochanter, Drehgelenk, Roll- 

 stuck, genu, ischium, rotula, trochlea, tarsus, 140, 149, 

 155, 290, 485. 



Isopoda (1<ros, equal, irotis, a foot), " tous les pieds simples et 

 uniquement propres a la locomotion ou a la prehension " 

 (Latreille, Le Regne Animal, t. iii. p. 49), 99, 105, 122, 

 125, 155, 160, 169, 174, 184, 215, 282, 36S. 



Jambe, 93, 155. See Carpopodite. 



Kaumagen, 482. 



Kauplatteu, 482. 



Kieme, 365, 366. See Branchiae. 



Kleistagnatha (.kXzIoi, I shut, yvados, a jaw), 64. 



Kupferschiefer, marl-slate, in the Permian system; in certain 

 parts of Germany this is charged with ores of copper, 

 hence the German name, 148. 



Labium (in Latin, a lip), a deeply bifid organ, attached 

 centrally to the hypostome and forming the lower side 

 of the mouth-opening ; equivalent names are — lower lip, 

 tongue, langue, languette, Paragnathen, Zunge, meta- 

 stoma, Paragnatha, labium inferius; 93, 154,449, 4S6,532. 



Labium, applied by Fabricius to three of the mouth organs, 43, 

 56; la levre inferieure of Olivier is equivalent to the 

 maxillipeds, the terminal joints of which are called palpi 

 by Fabricius, 43, and antemiules by Olivier, 57; Say 

 uses the expression "labium (pei'ipalpi) " for these 

 organs, 102, and Savigny the term levre auxiliaire, 93. 



Labruni (in Latin, a lip), upper lip, levre superieure, labium 

 superius. ' ' The labium is divided into two parts, the 

 lower of which moves on the upper by a slight hinge, 

 and assists in perfecting the shutting of the mouth. The 

 free margin'is generally clothed with short hairs, often 

 of club-shaped and deformed appearance " (Brit. Sess. 

 Crust., vol. i. p. xiii.), 56, 154, 449, 450. 



Lsemodipoda (k<up.6s, throat, Slirovs, two-footed), "gorge a deux 

 pattes." 



Langue, languette. See Labium. 



Lavalette'sche Kolbonorgane, 427, 429. See Calceolus. 



Leg, joints of, 93, 140, 149, 155, 290, 360, 365, 485, 1654. 



Leydig'sche Cylinder, 427, 429, 480. 



Liver, 184, 300, 304, 364, 487, 504, 598. 



Lumbe. In Grnelin's Linmeus, t. i. p. 585, Martens' Lumbe (in 

 the form Lumme) is given as a synonym of Golymbus 

 Troile, Guillemot or Sea-hen, Foolish Guillemot, 7. 



Magendarm, 482, 489. 



Main, 155. See Propodite. 



Malacostraca (/xaXaxos, soft, tvTpaKov, a shell), 1,2,4, 6, 79, S3, 



107, 136, 1655. See Crustata. 

 Mandibles, also called jaws, protognathes, Kiefer, Oberkiefer, 

 43, 56, 62, 71, 92, 107, 116, 117, 154, 170, 184, 449, 

 450, 597, 1653. 



Mandibulata, 157, 254. 



Marginate ; "the term ' marginate ' refers to a peculiar margin 

 or thin cutting edge that is found on the palm in some 

 species, the form and appearance of which are liable to 

 variation " (Brit. Mus. Catal. Amph. Crust., p. 212). 



Marksubstanz, 489, 567. 



Marsupium, a pouch. See Incubatory pouch. 



Matrix, 504, 597. See Hypodermis. 



Maxilados, 231. See Maxillosa. 



Maxillre primi et secundi paris, also called first and second 

 maxilla;, Mackoires de la premiere et de la seconde 

 paire, deutognathes and tritognathes, first and second 

 siagonopoda, Unterkiefer and Unterlippe, innere Maxillen 

 andaussereMaxillen; 57, 64, 92, 154, 217, 454, 532, 600. 



Maxillipeds, also called foot-jaws, maxillary feet, pattes-ma- 

 choires, pieds-machoires, feuillets maxillaires exterienrs, 

 levre inferieure, tetartognathes, third siagonopoda, Un- 

 terkiefer, TJnterkieferbeine, Kieferfiisse, Maxillarfusse, 

 Unterlippe, labium (pedipalpi), palpi, pedes rnaxillares; 

 57, 62, 64, 92, 144, 154, 185, 217, 226, 231, 256, 323, 

 360, 454, 488, 532, 552, 1654. 



Maxillosa, Crustaces maxilles, Crnstaceos maxilados, 125, 174, 

 231. 



Medioliform (probably for modioliform, from Latin modiolus, 

 the nave of a wheel), an epithet applied by Say to the 

 second (in his terminology the third) joint of the second 

 gnathopod of Ccrcqms tubularis, 100. 



Meropodite (p,i)p6s, thigh-joint, irous, afoot), fourth (third free) 

 joint of the leg ; the equivalents are — third joint, fourth 

 joint, bras, cuisse, Schenkel, Schienbein, Unterarm, 

 metacarpus, tibia, meros; 93, 140, 155, 290, 485, 491. 



Mesenteries (peaevTepiov, an internal membrane), septa, 

 membranes dividing the interior of the body into 

 distinct cavities, of which one is called the dorsal or 

 pericardiac sinus, another the ventral sinus, 4S9, 507. 



Metacarpus. See Meropodite. 



Metastoma. See Labium. 



Metatarsus, used by Zenker for the fourth, fifth, and sixth 

 (third, fourth, and fifth free) joints of the leg, 149; by 

 Dybowsky for the fifth (fourth free) joint, by Clans and 

 in the form metatarse by Milne-Edwards for the sixth 

 (fifth free) joint, 155, 532. 



Micropylic apparatus (fimpos, small, ttv\i), a gate), 320, 350, 

 403, 553. 



Millimetre, 0-03937 of an inch. 



Mitosata, 63. 



Moniliform (monile, a necklace), with numerous small joints 

 like the links in a chain, 58. 



Monodactyle (popos, single, SctK-ruAor, a finger), "hands with- 

 out fangs," 69; used rather vaguely by the older authors, 

 but generally implying a subchelate hand, as opposed to 

 a chelate one, which they called didactyle, 19, 27, 45, 

 89, 100. 



