New cuttlefishes from the North West Shelf 
295 
toward centre of radula (Figure 13A,B); second 
laterals longer than first, distinctly curved, with 
broad heels; marginal teeth elongate with long 
tapered and curved mesocone (Figure 13A). 
Digestive tract (Figure 12F): paired salivary glands 
approximately one-third length of buccal mass; 
paired digestive glands large, located close 
together, with sub-triangular lobes posteriorly, 
ducts (not shown in figure) connect digestive 
glands near midline with caecum, ducts with 
branched attached pancreatic tissue; oesophagus 
runs dorsally along median junction of digestive 
glands, joins sac-like stomach immediately 
posterior to digestive gland; caecum disc-like, 
grooved in blunt V-shape anteriorly, surface lining 
finely pleated; intestine undifferentiated; ink sac 
and anal flaps well developed. 
Male reproductive tract: testis on left posterior 
side of viscero-pericardial coelom; at distal end, 
convoluted vas deferens opens into broad, cone- 
shaped mucilaginous gland, then narrower, 
curved, spermatophoric gland (Figure 14A). Close 
to junction with lobe-shaped accessory gland and 
gland appendix, delicate ciliated canal joins 
spermatophoric gland; distal deferent canal 
connects appendix of accessory gland to 
spermatophore storage sac; genital orifice opens 
dorsal to left gill in anterior end of mantle cavity. 
Spermatophores: cement body bipartite (Figures 
14B, 15A,B); aboral end elongate, cylindrical, 
connects to sperm reservoir via narrow duct which 
extends from nipple-like tip of cement body; oral 
end of cement body approximately half length of, 
and slightly narrower than aboral end; connects to 
aboral end via narrow neck, tapers toward oral 
extremity of cement body; middle tunic 
commences along aboral part of cement body; 
ejaculatory apparatus coiled, extends into oral 
dilation of spermatophore. Spermatophores 4.8- 
46-6.5 mm long (SD, 0.5), 0.15- 0.20 -0.30 mm wide 
(SD,0.04); SpLI 8.9-10.6-13.3 (SD, 1.4); SpWI 2.73- 
3.59-4.17 (SD, 0.39). 
Female reproductive tract: ovary hangs from 
dorsal wall of posterior viscero-pericardial coelom. 
Oviduct thin-walled, continuous with body cavity; 
distally with thickened, glandular walls (oviducal 
glands). Nidamental glands, in mature animals 
occupy large portion of ventral side of mantle 
cavity. Accessory nidamental glands anterior to 
nidamental glands (Figure 14C). Eggs spherical 
3.6-4.6-5.6 mm diameter (SD, 0.9); EgDI 5.5-46- 
8.3 (SD, 1.2). 
Subdermal cartilaginous layer between 
cuttlebone and skin absent. Cuttlebone length 
approximately equal to mantle length; outline oval; 
CbL males 47.0- 54.0 -59.4 (SD, 4.2), females 43.3- 
6Q7-75.4 (SD, 9.7); CbWI males 42.4-46.1-49.1 (SD, 
2.3), females 43.0- 46.5 -50.8 (SD, 2.9); triangular, 
obtuse anteriorly; bluntly rounded posteriorly 
B 
Figure 15 A-B, Sepia senta sp. nov.; A, oral end of 
spermatophore, paratype MV F77197, 49.8 
mm ML, scale bar 400 pm; B, enlargement of 
middle portion of ejaculatory apparatus, 
same specimen, scale bar 200 pm. 
(Figure 16A,B). Dorsal surface yellowish; flat 
medially, curved, convex laterally; texture rough, 
with irregular calcified projections (particularly 
pronounced towards distal tip of sepion) (Figure 
16C-E). Dorsal median rib present, indistinct, 
broadens anteriorly; lateral ribs present, indistinct. 
Dorso-posterior end of cuttlebone without median 
longitudinal ridge. Chitin present as a thin flim 
over entire dorsal surface of cuttlebone. Spine 
absent (Figure 16D). Striated zone flat; StZI males 
50.3- 545-60.6 (SD, 3.0), females 45.5-51.2-55.9 
(SD, 3.4). Last loculus convex; LoLI males 36.2- 
402-43.8 (SD, 2.2), females 40.5-46.5-50.8 (SD, 3.1). 
Last loculus slightly shorter than striated zone, 
LoL/StZ(%) males 61.8-71.4-81 (SD, 6.4), females 
72.4- 91.3- 102.8 (SD, 10.4). Sulcus absent. Anterior 
striae slightly convex to straight (Figure 16B). 
Limbs of inner cone extend anteriorly to end of 
striated zone. Inner cone limbs uniform width, 
narrow, not raised to form ledge; not thickened 
posteriorly (Figure 16B,E). Outer cone calcified; 
broadens slightly posteriorly (Figure 16B); lateral 
limbs not flared, slightly recurved posteriorly 
(Figure 16E). 
Body papillae absent. Head and arm papillae 
absent. Colour (alcohol preserved specimens): head 
