REPORT ON THE AMPHIPODA. 69 



1802. SCHOUSBOE, P. K. A. 



Jagttagelser over tvende sieldne og lidet bckiendte Krebsarter. (Oplsest den 

 24 May 1799.) Skrivter af Naturhistorie-Selskabet. 5te Bind. 2det Hefte. 

 Ki0benhavn, 1802. 



The two Crustacea in question are here called Dromia dypeata and Gammarus sedentarius. 

 The latter, ForskSl's now well-known species, is fully described and fairly figured. Of it 

 the author says, " In mari Tingidem alluente unica tantum vice plura specimina inveni 

 mense Febr. 1793." He criticizes Herbst's rendering of Forskal's account, and his copy of 

 Forskt^l's figure, as not quite accurate. He suggests that some unknown Mollusc may have 

 been the first and original owner of the dwelling in which the creature is found. 



1802. TURTON, AViLLIAM. 



A general system of Nature, etc., etc. Translated from Gmelin's last Edition of 

 the celebrated Systema Naturae, by Sir Charles Linne. Amended and enlarged by 

 the improvements and discoveries of later naturalists and societies, with appropriate 

 Cop)per-plates, by William Turton, M.D, Vol. iii. London, 1802. 



Among the Insecta Aptera, foUowing "118. Scorpio," comes "119. Canckr. Legs, 8 (rarely G 



or 0) besides 5 chelate hands or claws furnished with a moveable thumb: feelers 6, unequal: 



eyes 2, distant elongated moveable, and generally placed on peduncles : mandibles horny 



thick ; Up triple ; tail articulated and unarmed." 



Under Cancer, Section " F. Antennas pedunculate and very simple. Gammarus," contains the 



following information :■ — 

 "Ampulla. Hands without fangs : legs 14 : hind- thighs compressed dilated. 

 Ivihahiis the Northern Ocean. PMpps. tab. 12. iiij. 3. 



Body nearly white ; proboscis short incurved and very sharp : tail with 6 leaves, 

 the last joint bifid. 

 " Nugax. Hands without fangs : legs 14 : 6 hind-thighs compressed dilated. 



Inhabits North Seas. PMpps. tab. 12. fig. 3. 

 " Carino-spinosus. Hands without fangs : legs 14 ; back carinate and spinous. 



Inhabits In the British Museum. 



Body whitish subcompressed ; the hind segments a little spinous. 

 " Cancellus. Hands 4 without fangs: legs 16. 



Inhabits Siberia. Pall. Spic. Zool. 9. tab. Z. fig. 18. 

 First pair of antennae incurved. 

 " * Grosdpes. Hands without fangs : antennae longer than the body : tail obtuse. 



Inhabits Europe. Brit. Zool. iv. tab. 16. fig. 31. 

 "* Locusta. Hands 4 without fangs : legs 14: thighs simple: tail with bifid spines. Roes. Ins. 

 3. to6. 62. Suh. Ins. tab. 2^. fig. \b2. 

 Inhabits Europe on sandy shores and in stagnant waters; leaps about with great 

 agility. 

 " * Pulex. Hands 4 without fangs : legs 10. 



Begeer. Ins. 7. tab. 33. fig. 1. 2. Bast. tab. 3. fig. 7. 



Very common in fountains and rivulets, and swims in an incurved posture upon its 

 back : is very troublesome to fish by getting between their gUls, and is said to 

 shine by night. 



