(lAJIMARm.H. \2i 



1. Acanthonotus Testudo. U'i-atk XXlll. n-. ;{.) Jj.M. 



Ouiscus I'lstuilo, Mo/ifdi/if, Liiui. Traiia. ix. p. 102. f. G. t. 5. 



Lvurh, Eiliiib. Juiri/c. vii. p. 40o. fffii. Ixvi. 

 Aoantlionotiis Tt'.studo, Wliiff, Hist, lirit. Cni.sf. p. 177; Pror. /.<><>/. 

 Soc Lonil 18o0; Cut. lirit. Crust, li. M. p. ol, 1850. 

 Oo.ssc, Murine Zoo/nt/i/, p. 142. f. 2<i0. 

 Acaiitliouotus Crauohii, 'iJliitc, Cat. Cru.st. B. M. p. ol, 1847. 

 ^\'rtlunuus Craurliii, White, Cat. Crmt. B. M. p. 8'), 1847. 

 Acanthonotus Owenii, Sprxee Bate, Brit. Assoc. Bejjortf 1855; Si/n- 

 op.sis, ^-e., Ann. Nat. Hist. Fob. 1857. 



Dorsally cai-inatcd. Ceplialon produced into a long ro.'slrnin. La.st 

 .segment of the pereion and fir.st four of tlio plcon produced 

 posteiiorly into a large dor-sal tooth. Thi'ee anterior segments of 

 the pleon carrying a lateral ridge, having the posterior margin 

 ornately denticulated ; fourth having a deep dorsal sinus. Eyes 

 round, prominent. Superior antenntc pyriform ; pedimcle longer 

 than the flagcllum. Inferior anteilna) .shorter than the superior, 

 and not .so stout at the base. Gnathopoda uniform ; coxa deep, 

 produced to a point ; cai-pus longer than the propodos, .slightly di- 

 lated at the inferior distal extremity, and ciliated ; propodos having 

 the palm short, acute, rounded at the inferior angle, and ciliated. 

 Fii-st pail' of pereiopoda ha-sang the coxa deep, and produced to a 

 point. Second pair rather deeper than the first and produced to 

 a point, curved posteriorly ; upper part excavated to I'eceivc the 

 coxa of the next pair of pereiopoda, which is produced to a point, 

 obliquely directed posteriorly. Coxa3 of the two posterior pairs of 

 pereiopoda small, angular ; basos of each of these posterior pail's 

 gradually increasing in dilatation. Three posteiior pairs of pleo- 

 poda subcqual ; rami equal. TcLson long and deeply cleft. 

 I.<Migth ^ an mch. 



Hah. Scotland, Banff (.!//•. F'?)/Y/rr/), Macduff {Mr.Gregor); Ireland, 

 Ih-ay, Scallop-bank, 15 to 30 fathoms (Prof.KinaJian); KngUuid, 

 Falmouth (Dr. Leach and Mr. Wehster), S. Devon (Montagu). 



It is worthy of remark that the lai-va of this .species possesses a 

 uniurticulate secondary appendage to the .superior antennae. 



2. Acanthonotus serratus. (Plate XXIII. fig. 4.) 



( )ui.scus .sonatiLs, (). Fahricius, Fauna Grnnf. no. 2.'37. 

 Anipbitoe Scrra, Krui/er, (ironl. Anijip. t. 2. f. 8. 

 Acanthonotus Serra, Echv. Hist, des Crust, iii. p. 25. 

 Acantlionotus cri.stntus, Ouen, AppeniUjc to Second Voijar/e N. W. Pass. 

 p. xc. ].l. 15. f. 8. 



Fdu-. Jlist. den Crust, iii. p. 24. 

 AcauthonotUii serratus, Stijnjwon, Marine Inc. Crand Ma nan, ]). •)2. 



Dorsally carinated. . Ce])halon produced into ji rostrum. Sixth and 

 .seventh segments of the pereion and the first four of tlu- pleon 



