INTERMEDIATE OR CONTINENTAL ZONE. 241 



metrical belt. Lifhodes, a shallow-water form in the cold seas of both the 

 Northern and Southern Hemisphere, is found in the tropics only at consider- 

 able depths. Miinida, too, is a type of world-wide distribution in compara- 

 tively shallow waters of the North and South Temperate regions. But it 

 reaches its maximum development in moderately deep water (100-300 

 fathoms) within the tropics, and one species {Munida stimjjsom) has been 

 found in the West Indian region at so great a depth as 1105 fathoms.* 

 Xanthodcs, Ehalia, Solenocera, and Sicyonia, are littoral or sublittoral genera 

 of cosmopolitan range in the warmer seas of the globe. Ct/mo2)olia is also a 

 genus of extended geographical range, with a vertical distribution from the 

 shore to 298 fathoms. Catajxtgunis has been hitherto known from the east 

 coast of North America, 50-300 fathoms, and from the Arafura Sea and the 

 Feejee Islands, 28 fathoms; the "Albatross" species has most affinity with 

 that from the Arafura Sea. ^tliusa and Pasiphaeia are cosmopolitan genera 

 with a bathymetrical range extending from the littoral belt and the surface 

 to 1000 fathoms. Anamathia, Urcypti/clms, Iconaxiiis, and Aristceus have their 

 fullest development in the intermediate zone between 150 and 500 fathoms. 

 They are all genera of world-wide range, unless it be Iconcn'uis, which has 

 hitlierto been found only on the east and west sides of the Pacific. The 

 following genera represented in the material collected by the "Albatross "at 

 a depth less than 500 fathoms may be considered as deep-water types which 

 overlap the limit of the intermediate belt : Munidoims, Polychdes, Gly- 

 j)hocrcmgon, Heterocaijyus, Neviatocarcinus, Acanthe2jJiyra, Benthesicymus, and 

 Gnathophausia. 



The following list indicates the genera found below the 500 fathom line ; 



those whose range extended beyond 1000 fathoms are printed in italics : — 



Trachycarcinus. Eri/iinicus. Teneus (1 species). 



jSfhiisina. Sclerocraiigon. Pcncojisis. 



Leptolithodes. PontophUus. Haliporus. 



Lithodes Paracrangon. Jlemlpeneus. 



Parajxiffurus. Ghjphocrangon. Benthesicymus. 



Galacantha. Heterocarpus. Gennadas. 



Munidojjsis. Pandalopsis. Sergestes ? 



Axiiis (Iconaxius) Nematoenrcinus. Giiathophausia. 



Calastacus. Acantheiihyra. Eucopia. 



Nephropsis. Hymenodora. Petalophthalmus. 



WUlemoesia. NotostomAis. Scolophthalmus. 



Polycheles. Pasiphaeia ? Ceratoiuysis. 



* As a result, cliieflv, of tlie dredging expeditions of the last twenty years, the number of known species 

 of Mitiiida has been raised from six to about forty-five. 



31 



