132 
MR. W. E. HOYLE ON THE 
[ Mar. 5, 
Gonatus. 
1. Arms (except the ventral pair) 
with hooks and suckers (4 
rows). 
2. Tentacular club with hooks and 
suckers. 
3. Tentacle with connective appa- 
ratus along the stem. 
4, The fins extend beyond the end 
of the body and their carti- 
lage slides upon the gladius. 
5. Valve in funnel; also funnel- 
organ. 
6. Siphono-pallial articulation 
simple. 
a 
Siphonal cartilage present. 
8. Pen with phragmocone but no 
dorsal process. 
9. Musculi retractores capitis 
mediani fused in middle of 
their course. 
Retractores mediani distinct 
from retractores laterales. 
10. 
11. Nuchal muscle absent. 
. Radula with 5 rows of teeth; 
median like those of Onycho- 
teuthis. 
13. Anterior salivary glands rudi- 
mentary. 
14, Anal appendages symmetrical 
(in young). 
15. No accessory hearts on the 
arteries. 
16. 
17. 
Oviducts in number two. 
Oviducts dorsal to gill-roots. 
18. Nidamental glands present. 
Onychoteuthis. 
Arms with suckers (2 rows). 
Tentacular club with hooks 
and suckers. 
Tentacle with connective 
apparatus confined to 
base of club. 
The fins extend beyond the 
end of the body proper, 
but the pointed dorsal 
process of the gladius ex- 
tends as far as they do. 
Both present. 
simple. 
absent. 
With phragmocone and 
dorsal process. 
As in Gonatus. 
Retractores mediani fused 
with retractores laterales. 
absent. 
7 rows, more complex. 
small. 
asymmetrical. 
Accessory hearts. 
two. 
Oviducts opening into pouch 
dorsal to gill. 
present. 
Enoploteuthis. 
Arms with hooks, or hooks 
and suckers (2 rows). 
Tentacular club with hooks 
and suckers. 
As in Onychoteuthis, 
The fins do not extend be- 
yond the end of the 
body. 
Both present. 
simple. 
absent. 
Neither phragmocone nor 
dorsal process. 
Musculi retractores capitis 
mediani distinct. 
Retractores mediani distinct 
from retractores late- 
rales. 
present. 
7 rows, less complex. 
rudimentary. 
symmetrical. 
Accessory hearts. 
two. 
As in Gonatus. 
absent. 
