242 THE CRUSTACEA 



SUB-ORDER 3. Caprellidea, Dana (1852). 



Head coalesced with second thoracic somite ; palp of maxillipeds with 

 from one to four segments (rarely absent) ; rarely all the thoracic legs 

 well developed, fourth and fifth pairs usually vestigial or absent, coxo- 

 podites small or coalesced with the body ; abdominal somites generally 

 all fused, appendages vestigial ; eyes small. 



Family CAPRELLIDAE. Cercops, Kroyer ; Phtisica, Slabber (Proto, 

 Leach) (Fig. 134, A); Caprella, Lamarck (Fig. 134, B). Family CYAMIDAE. 

 Cyamus, Latreille ; Platycyamus, Liitken ; Paracyamus, G. 0. Sars (Fig. 

 135). 



SUB-ORDER 4. Ingolfiellidea, Hansen (1903). 



Head not coalesced with second thoracic somite ; palp of maxillipeds 

 with four segments ; all the thoracic legs present, coxopodites small ; 

 abdominal somites distinct, first three and last pairs of abdominal 

 appendages vestigial ; eyes wanting but articulated eye-lobes are present. 



Family INGOLFIELLIDAE. Ingolfiella, Hansen. 



LITERATURE. 



1. Bate, C. Spence. Catalogue of the . . . Amphipodous Crustacea in ... 



the British Museum, pp. iv + 399, 58 pis. 8vo, 1862. 



2. Bate, C. Spence, and Westwood, J. 0. A History of the British Sessile- Eyed 



Crustacea, 2 vols., 1863 and 1868. Issued in parts, 1861-1868. 



3. Boeck, A. De Skandinaviske og Arktiske Amphipoder. Pp. 711, 32 pis. 



4to. Christiania, 1872-1876. 



4. Bovallius, C. Mimonectes, a Remarkable Genus of Amphipoda Hyperiidea. 



Nova Acta R. Soc. Sci. Upsal. (3), xiii. No. 4, pp. 15, 3 pis., 1885. 



5. Contributions to a Monograph of the Amphipoda Hyperiidea. Kgl. 



Svenska Vet.-Akad. Handl., Ny Foljd. xxi. No. 5, pp. 72, 10 pis., 1887 ; 

 and xxii. No. 7, pp. 434, 18 pis., 1889. 



6. The Oxycephalids. Nova Acta R. Soc. Sci. Upsal. (3), xiv. No. 4, 



pp. 141, 7 pis., 1890. 



7. Ckevreux, E. Amphipodes provenant des Campagnes de 1'Hirondelle, 1885- 



1888. Resultats des Campagnes scientifiques . . . Monaco, xvi., 1900. 



8. Claus, C. Zur Naturgeschichte der Phronima sedentaria, Forsk. Zeitschr. 



wiss. Zool. xxii. pp. 331-338, pis. xxvi.-xxvii., 1872. 



9. Der Organismus der Phrouimiden. Arb. zool. Inst. Wien, ii. pp. 59- 



146, pis. iii.-x., 1879. 



10. Die Platysceliden, pp. 77, 26 pis. 4to. Wien, 1887. 



11. Delage, Y. Contribution a 1'etude de 1'appareil circulatoire des Crustaces 



edriophthalmes marins. Arch. zool. exper. ix. pp. 1-173, pis. i.-xii., 1881. 



12. Delia Valle, A. Gammarini del Golfo di Napoli. Fauna und Flora des 



Golfes von Neapel, Monogr. xx. 1 vol. and atlas, 1893. 



13. Dybowsky, B. N. Beitr. z. naheren Kenntniss der in dem Baikal-See vor- 



kommenden . . . Gammariden. HoraeSoc. Entom. Rossicae, x., Beiheft. 

 pp. 190, 14 pis. 4to, 1874. 



14. Hansen, ff. J. The Ingolfiellidae, fam. n., a New Type of Amphipoda. 



Journ. Linn. Soc. London, Zool. xxix. pp. 117-133, pis. xiv.-xv., 1903. 



