
HALE—AUSTRALIAN CUMACEA 147 
8. Dorsum of each pleon somite with uo pair of serrate dorsal carinae, the teeth aente 
oasiana Stebbing. 
Dorsum of each pleon. somite with two rows of blunt-ended large tubercles 
inconstans ap. nov, 
9, Pedunele of uropod fully as long as telsonic somite and barely shorter than endopod, Large 
dorsal spines (or tubercles) of anterior pleon somites clavate .. clavatius 8p. NOV, 
Pedinele of iropod much shorter than either teluonic somite or uropod. Taree dorsal spines 
of anterior pleon somites acute or subacute He -» 10. 
10. Endopod of uropod not more than twice as long as peduncle .. irvopicintetiue Calman.” 
Endopod of uropod more than twiee aa long as pedinole » abd 
11, Antero-lateral angles of carapace serrate af Da an 8. 
Antero-luteral angles of carapace not sarrate “ v4 . 1. 
12. Peondorostral lobes meeting helow, Exopod of uropod about one- e-third as long as edtlowod 
unguiculatus (Bate) .* 
Psoudorostral lobes gaping below. Exopod of uropod very short, abot one-tenth as long ae 
endopod ; a iss be bf .. asper sp. nov. 
18. Back nnd sides of carapace spinose i ” os sorst Kosemann, 
Back and sides of ecarnpace not aspinose - . 4 stebbing? Calman, 
14, Pedunele of wropod distinctly longer than telsonie ‘earaitp He sheardi ap. nov." 
Pedunele of uropod shorter than teleonie somite —. . ov 1B 
15, Tnelnding the terminal spine in the length of each ramus, the exepod of the atop 4 is barely 
more than one-fourth as long as endopod , +» Sumi Sars," 
Mensnred thua, the exopod of uropod is at Tenst more ‘than one- third as long as endopod 16, 
16, Terminal spine of exopod of aropod reaching {o distal end of endopod (without its apine) 
perdus Calman. 
Terminal apine of exopod of uropod not reaching to distal end of endopod |, HAG 
17, First pleon somite with a distinet median, longitudinal, dorsal pit georat Stebbing, 
First pleon somite with no pronounced dorsal pit .. .. 18. 
18, Terminal spine of exoood of uropod not reaching beyond middle of length of endopad (nat 
inelnding terminal spine of latter) as oe LPs 
Terminal spine of exopod of uropod reaching beyond middle of length of endopod (not, 
including terminal spine of Iatter) Re ‘ .. 20. 
19. Antero-lateral ¢orner of medpace vounded, Last vedigbriraa nid first iain somite with no 
dorsal tumidities sautert Zimmer, * 
Antero-lateral corner of earapace with spine. Last pedigerous and first pleon somite each 
with a dorsal tumidity x _" inflatus ap. nov.” 
20. Basis of anterior peracopoda with the nena} oxtornal Tametate epines . 2. 
Basis of antorior peracopods without external lamellate spines . . muystacinus Zimmer,” 
21, Carpus of fifth peraeepod shorter, or barely longer, than propoduea re -- 22, 
Carpus of fifth peracopod half as long again aa propodus 7 atmmeri Calman, 
22, Intogument prinulate. Laat pedigerons and firet two pleon somites each with u pair of 
dorsal apines, Tnner margin of endopod of uronod with five short spines svbinflatus sp, nov.* 
Intosument smooth, No dorsal spines on pedigerous or pleon somites. Tnner margin of 
endonod of nropod with six spiner Je ‘ , Johnstons sp, nov.* 
KEY TO FRMALES OF SPECIFS OF NANNASTACUS. 
The male also ig known in the species marked (*), 
1. Uropod with pedimele at least twice as long as telsonic somite - . is -- 38. 
Tropod with peduncle much loss than twice as long as telsonic. somite rie ote) ahi 
2, Psaudorostral lobes meeting above for greater part of length, but divergent near anterior 
ends. Propodus of first peraropod less than twice as long as dactylua longirostris Sars.* 
Pseudorostral lobes not gaping above near apex of Pasatnrethean Propodus of first 
poraeopod more than twiee as long as dactylus — -- nasutus Zimmer.* 
3. Carapace with an open row of eurved, laminate spines flanking the branchial regions 
Beipehquliceen Bate 
Carapnee without these spines ' 4 
4, Carapace with short, stont, thorn-like spines on back ae sido erinaoeus Zimmer, 
Oarapace without such spines 
