A HISTORY OF DEVONSHIRE 



Order ISOPODA (continued) Order ISOPODA {continued) 



Division IsoPODA Genuina {continued) ^'^'''°" ^^""""^ °^''"'''* (^««''««'^) 



Tribe Oniscidea {continued) 

 Tribe Oniscidea {continued) 



Family Oniscidae {continued) 



Family Oniscidae («»ri«W) Metoponorthus pruinosus (Brandt). Porcellio p., 



— laevis, LatreiUe. P. I., Latr., Leach, Bate and Brandt, Bate and Westwood, Parfitt; Meto- 



Westwood, Budde-Lund ponorlhus p., Budde-Lund, Sars, Stebbing 



Porcellio dilatatus, Brandt and Ratzeburg. P. d., B. -r. -i a„„.„„, „ 



, „ „ ' , ,„ 1 o 1 1 ■ ramily Armadillidiidae 



and R., Bate and Westwood, Stebbing ' 



Metoponorthus cingendus (Kinahan). Porcellio c, Armadillidium vulgare (LatreiUe). Armadilh vulgaris, 



Kinahan, Bate and Westwood ; Metoponorthus c, Latr., Bate and Westwood, Parfitt ; Armadilli- 



Dollfus, Stebbing ' ' dium vulgare, Milne-Edwards, Budde-Lund 



It is impossible here to deal with the numerous points of interest that suggest themselves in 

 connexion with this great group. Reference must be made to the authorities whose names have 

 been cited. Their writings in most cases will be familiar to students of the Isopoda. The 

 valuable list supplied by the Journal of the Marine Biological Association for 1904 depends on the 

 combined exertions of many workers, to whom the fauna of Devon is deeply indebted in regard to 

 a large number of groups. My own researches, so far as the carcinology of Devon is concerned, 

 have been conducted almost exclusively in the neighbourhood of Torquay,' Salcom^e, and Ilfra- 

 combe. Among less recent papers one that seems to deserve particular commemoration is that 

 by Dr. E. Moore, F.L.S., in Charlesworth's Magazine of Natural History^ * On the occurrence 

 of the Teredo navalis and Limnoria terebrans in Plymouth harbour.' This essay supplies a very 

 striking picture of the damage that can be done to unprotected submerged timber by an animal 

 so insignificant in size as the so-called Gribble, and one so sluggish in its habits, except apparently 

 in the use of its jaws. Montagu remains the envy of English collectors in regard to his capture 

 of Callianassa subterranea with its parasite lone thoracica at Salcombe. Of the latter he says, ' This 

 curious species of Oniscus inhabits the thoracic plate of Cancer suhterraneus, concealing itself 

 between the fleshy part and the shell, and forming a tumour on one side. From this situation I 

 have extracted it alive, and have kept it in that state for several days in a glass of sea water. In 

 the few of that rare species of crab I have obtained, two or three of these parasitical insects have 

 occurred, and have always been attended by the male, who attaches himself firmly by his claws to 

 the ventral fins, or appendages.' 



Idotea neglecta has only recently been added to the English fauna. The opinion of Sars that 

 it had long been confiised with other species is confirmed by Norman, who speaks of having received 

 hundreds of specimens of it from the Plymouth marine station. Leach knew of only one occur- 

 rence of Porcellio laevis in Britain, and that was in Devonshire. Budde-Lund gives it a vast list of 

 synonyms, and gives it the whole world for its country, Britain being one of the lands over which 

 it is generally distributed. The distribution of Porcellio dilatatus is being gradually extended. 

 Salcombe may be added to the localities at which it has been found. 



Order AMPHIPODA Order AMPHIPODA {continued) 



Tribe Gammaridea Tribe Gammaridea {continued) 



Family Lysianassidae Family Lysianassidae {continued) 



Acidostoma obesum (Bate). Anonyx obesus. Bate; Perrierella audouinlana (Bate). ij)«W« j».. Bate ; 

 Acidostoma obesum, LiUjeborg, Stebbing » Perrterella a., Bonnier ; ParansUasmdommanus 



Nannonyx gogsii (Boecic). Orchomene g., Boeck ; Robertson ; Pernerella crassipes, Chevreux and 



iVtf«»fl»v;v^., Sars, Norman,* A. O.Walker ^ ^ Bouvier , .,. , 



Lysianassa plumosa, Boeck. L. p., Boeck, Stebbing ; O'chomene batei, Sars. (?) Lystanassa humlts, A. 

 L. costae. Bate and Westwood (not Milne- ^°'^ ' . Orchomene h., Norman ; Lystanassa 



Edwards) ; Lysianax septentrionalis, Delia Valle, /^«^«m/ (part) -|- Anonyx edtoardst. Bate and 



Norman Westwood ; Anonyx serratus, Stebbing ; Orcho- 



mene batei, Sars, Hodgson, Stebbing 

 Scopelocheirus crenatus, Bate. S. c. Bate ; Callisoma 

 1 Hist, of Crustacea, 428, and Am. Nat. Hist. (Ser. 6), crenata. Bate ; C. Hopei, Norman 



"'"■ .. , ... r , o\ Orchomenella nanus (KrSyer). Anonvx n., KiHya ; 



' Op. cit. (new ser.), 11, 206 (1838). m , t. 1 t^ • rd -i. i 



» Trans. Dt-von. Assoc, xi, 518. Tryphosa »., Boeck, Bonnier ; T. ctltata, Sars ; 



* Ann. Nat. Hist. (Ser. 7), v, 207 (1900). Orckomenella c, Sars ; O. nana, Sars, Hodgson 



268 



