78 DE. G. C. BOtTRNE ON Till? EANINIDiE : 
Fig. 17. Tlioi'acic skeleton of Notopus dorsipes seen from the left side, illustrating the great 
depth of the epimera and the oblique raised ridg'e on the 11th, 12th, and 13th 
epimera, against which the lower margin of the hranchiostegite fits : ix, x, the 
ninth and tenth sterna ; vi/vii to ix/x. intersegmental arthrophragms. 
Fig. 18. Frontal view of the thoracic skeleton o( Notopus dorsipes. The articular socket of 
the second raaxilla of the left side is omitted. 
Fig. 19. The antennar}' region of Nephrops norveyicuK. The rostrum is cut short and the eyes, 
autenuules, and antennas are removed from their sockets, i. The membranous 
ocular sternum ; ii. the antennulary sternum ; iii. ihe antennary sternum ; iv. the 
mandibular sternum; ii/iii. the arthrophragm between the antennulary and 
antennary fosste. .r. sclerite identified as the mandibular epimeron. 
Fig. 20. Side view of the ocular and the antennary regions of Nephrops norvegicus. The 
rostrum is cut short and the antennules and antennae are removed, oc.t. sclerite 
representing the tergum of the ocular segment; i. the sternum of the ocular 
segment: the epimera of this segment are membranous. 
Fi". 21. Anteunary region and buccal frame of jEthusina gracilipes, Miers. Ep. iv. epimeron 
of the mandibular segment. 
Fig. 22. Antennary region and buccal frame of Notopus dorsipes. The appendages have been 
. removed, with the exception of the right ocular peduncle and the left mandible. 
Ai, ^2,*sockets of the antennules and autennM ; ^^fff- sub-autennary lobe of the 
pterygostorae. 
Fig. 23. A similar view of the antennary region and buccal frame of Manina dentata. 
Plate 6. 
Fig. 24. A similar view of the antennary region and buccal frame of Notosceles chiimnonis. 
Fig. 25. A similar view of the antennary region and buccal h-tawe oi Lyreidtis tridentatus, 
showing tlie great elongation of the antennary sternum iii. pgl. paraglossse. 
Fi". 26. Perspective sketcli of the buccal frame oi Ranina dentatu, to show the hood-shaped 
mandibular sternum iv. 
Fio-. 27. Antennary region and buccal frame otDromia vulgaris. The appendages have been 
removed, with the exception of the right ocular peduncle. 
Figs. 28-33. Notopus dorsipes. Fig. 28. Eight anteunule : admedian aspect. 
Figs. 29 & 29 a. Right antenna, admedian and outer aspects. IS, segments of the peduncle. 
Fig. 30. Second maxilla with scaphognathite. 
Fig. 31. First maxilliped. Fig. 32. Second maxilliped : note the relatively large flagellum 
of the exopodite. Fig. 33. Third maxilliped : note the oblique line of hairs on 
the ischium also seen in Ranilia, M. Edw. 
Fig. 34, outer and Fig. 34 a, admedian views of the right antennule of Ranina dentata. 
Note the external opening of the statocyst, scy. 
Fio-. 3,5, outer and Fig. 35 a, admedian views of the right antenna of Ranina dentata. 
1-5, segments of peduncle. 
Fig. 36. Outer aspect of the right antennule of Ratiinoides personatus. Note the infolding 
of the cuticle to form the statocyst, and the external aperture of the latter at scg. 
Fig. 37. Admedian view of the right antenna of Raninoides personatus. In this genus and 
in Lyreidus the two basal segments of the peduncle are indistioguishably fused 
together. 
Fio-. 38. Admedian view of right antennule of Lyreidus tridentatus. 
Fig. 39. Admedian view of right antenna of Lyreidus tridentatus. 
Fif. 40. Admedian view of right antennule of Notosceles chimmonis. 
Fio-. 41, outer and Fig. 41 a, admedian views of the right antenna of Notosceles chimmonis. 
Fig. 43. Notosceles chimmonis. Third maxilliped. 
