CRUSTACEOLOGY. 



Crustacea. 



fiaghtaria. 



Phalan- 

 gium. 



Plats 

 CCXXI. 

 F.g. 4. 



25. Ma- 

 cao VODIA. 



Longiros- 

 tris. 



26. Litho 



DE8. 



Maja. 



27. Cort- 



STES. 



Cassivelau 



nu«. 



Cancer maja of Scopoli. Cancer spinosus, Oliv. Eneycl. 

 Method. Hist. Nat. torn. vi. p. 173. Maja squinado of 

 Latreille. 



Inhabits the Mediterranean Sea. 



To this division belong Cancer asper, Dorsettensis, and 

 Tetraodon of Pennant's British Zoology. 



** Second pair of feet very slender, and three times 

 the length of the body. 



Sp. 7. Sagillaria. Rostrum very long, and surround- 

 ed by spines ; feet spiny, arms elongate. 



Maja sagittaria of Latreille. Inachus Sagittarius of 

 Fabricius. 



Inhabits the island of Guadaloupe. 



Sp. 8. Phalangium. Rostrum long and bifid, con- 

 tracted at its base. Shell somewhat hairy, with three 

 acute spines in the anterior part, obtuse tubercles be- 

 hind : snout bifid. 



Inhabits the northern seas, and is very abundant on 

 many of our coasts, being frequently taken by the oyster 

 dredgers, who imagine it to be the young of araneus. 



Cancer phalangium of Pennant. Lepiopodia phalan- 

 gium, Leach's MSS. See Plate CCXXI. Fig. 4. and 

 Appendix. 



Genus XXV. Macropodia. Shell nearly triangular 

 (unequal and rostrated in front ;) external double palpi 

 narrow and porrected : the second joint of the internal 

 peduncle pretty long. Eyes distant : feet alike, the 

 kinder ones neither spurious nor minute. 



Sp. 1. Longirostris. Shell hairy, with three erect 

 spines on the front ; the hinder part with obtuse tu-. 

 bercles ; rostrum bifid. 



Cancer dodecos of Linne ? 



Inachus longirostris of Fabricius. Macropus longi- 

 rostris of Latreille. Macropodia longirostris, Leach's 

 MSS. 



Genus XXVI. Lithodes. Shell nearly triangular 

 and unequal, the anterior part rostrated. The external 

 double palpi with narrow cylindrical footstalks. Eyes 

 near each other at their base, but diverging above the 

 shell. Hinder feet minute and spurious. 



Sp. 1. Maja. Claws, feet, and shell spiny; rostrum 

 spiny, with the apex bifurcate: flesh-coloured when 

 alive. 



Inhabits the northern and British seas. It is very rare 

 in this country, being found only on the rocky coasts of 

 Yorkshire and Scotland. It has been mistaken by Pen- 

 nant for Cancer horridus of Linne, which we have al- 

 ready shown to belong to a distinct genus. Vid. Gen. 

 24. Maia horrida. 



Cancer maja of Linne. Inachus maja of Fabricius. 

 Lithodes arctica of Latreille. Cancer horridus of Pen- 

 nant. 



Mus. Donovan, Montagu, Neill, Leach, Fleming, 

 Sowerby. 



Genus XXVII. Corystes. Shell somewhat oval. 

 External antennae porrected, as long as the body. The 

 second joint of the internal peduncle of the external 

 double palpi lengthened, and gradually narrowing to- 

 wards the apex. Arms of the male three tunes the 

 length of the body. 



Sp. 1. Cassiveiaunus. Thorax rugulose, with four 

 teeth on each side. Wrists with two or three spines. 

 Cancer cassivelaunus of Pennant. 



Inhabits all the sandy shores of our island, where it 

 is frequently cast ashore, after a brisk gale of wind. 

 Between the second and third spine, there is a small 

 projecting process. Colour, when alive, flesh red. 



Obs. Coristes longimanua of Latreille is merely the 

 male of this species. 



395 



Genus XXVIII. Mictyris 1 . Shell nearly oval, ele- 

 vated, and truncated behind. Antennas short. The basi- 

 lary joint of the internal footstalk of the external dou- 

 ble palpi very large. Arms at the base of the wrist 

 jointed. 



Sp. 1 . Longicarpus. Body nearly oval, thick, rather 

 narrower in front, truncated behind, soft, and of a pale 

 yellow colour. Length about nine lines. Shell with 

 two longitudinal impressed lines ,• the anterior margin 

 inflexed and rounded, and lateral external angles (as 

 in some of the Ocypodes) produced into a tooth be- 

 hind the eyes ; the posterior margin ciliated with short 

 black hairs. Eyes globular, with a short peduncle, 

 placed under the anterior margin of the shell, (as m 

 the Ocypodes.) Arms exserted forwards and down- 

 wards ; the base of the second joint internally with a 

 strong spine ; the next joint triangular, the apex be- 

 low being armed with three little processes. The wrist 

 lengthened, somewhat arched, and hairy on the in- 

 side. Hand short, much compressed, with elevated 

 lines. Fingers elegantly lengthened. Thumb witli u 

 strong single tooth. The other feet twice as long as 

 the body, and much compressed ; the tarsi furroweal 

 and compressed ; the second and first pair the largest,, 

 and nearly of an equal size. 



Inhabits the East Indies. This l'are and curious ani- 

 mal was first described by the French author Latreille, 

 (whose system we are nearly following,) from a speci- 

 men in the Parisian Museum of natural curiosities. Our 

 description is made from his, and the MSS. of Mr Leach, 

 who described it from a specimen in the collection of 

 the Royal College of Surgeons, London ; and who had 

 not seen Latreille's work at the time he drew up his 

 description. 



Genus XXIX. Dorippe. Shell somewhat oval, de- 

 pressed, narrow before, and truncated. The four pos- 

 terior feet dorsal ; the last joints shortest. 



Sp. 1. Quadridens. Middle of the clypeus with four 

 teeth ; those placed externally shortest. Sides of the 

 shell with one tooth ; the four anterior thighs some- 

 what notched. 



Cancer lanatus of Linne ; Dorippe quadridens of La- 

 treille and Fabricius. 

 Inhabits the Mediterranean Sea, and figured by Plancus. 



*** Some of the feet formed for swimming, the last 

 joint being compressed and foliated. 



Genus XXX. Orithyia. The two hinder feet 

 alone formed for swimming. 



Sp. 1. Mamillaris. 



Orylhia mamillaris of Fabricius and Latreille, on 

 whose authority we have inserted it here. They refer 

 to a figure in Herbst, tab. 18. fig. 101. 



Inhabits the Indian Ocean. 



Genus XXXI. Matuta. All the feet, with the ex- 

 ception of the brachia, inserted in the same horizontal 

 line, and furnished for swimming. 



Sp. 1. Victor. Shell punctured on all sides, but not 

 striated Tbehind. 



Matuta victor of Fabricius and Latreille. 



Inhabits the Indian Ocean. 



Sp. 2. Herbstii. Shell with impressed dots ; deeply 

 striated behind. 



Matuta Herbstii, Leach's MSS. 



A new species, described in the manuscripts of Mr 

 William Elford, Leach, from a specimen in the British 

 Museum, and named by him, after the celebrated crus- 

 taceologist Herbst, author of a large work in the Ger- 

 man language, entitled Von Krabben^ .illustrated witk 

 correct plate?. 



Crustacea 



Longicar* 

 pus. 



99. D«i 



IUPPE. 



Quadri T 

 dew. 



30. Oai- 

 thvu. 



Mamillaris. 



31. Mat»^ 

 ta. 



Victor. 



Herbstii. 



