[91] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 
alcohol of moderate strength, repeatedly changed; at the present time 
the strength of the alcohol is about 80 per cent. They are in good con- 
dition, moderately firm and not badly contracted. Those designated as 
D, E, F, N, O, P were also collected at one time, in August, and pre- 
served together. They are in fair condition, but not so well preserved 
as the former lot. Those numbered ii to xiv were preserved together 
about the last of July. They were placed in strong alcohol, and are 
hard and badly contracted. J, K, and L were preserved together, but 
were originally found dead on the beach and in a relaxed state. They 
are only moderately contracted by the alcohol. 
Measurements of Ommastrephes illecebrosus (in inches). 
| 
0? |P2|De| EQ | Ic I¢ | Ro | Wo | Fresh. 
Tail to tip of dorsal arms..---....-.-.-.....- 13. 40 {13.00 |12.75 |10. 50 18.50 10.50 |10.50 | 8.25 | 12.04 
Tail to tip of second pair arms --.-....-..-.-- PEO a S570") as cole 14. 30 |10. 80 |11.10 |...... 12. 84 
Taal to tip of third pair arms ...--.-.-..-.-.--. 14. 20 /18. 70 /13. 25 |11. 00 |14. 20 |11.00 |11. 20 |...... 12. 84 
Tail to tip of fourth pair arms-..--...-..-.-- PSO | TBEGO) es Ss ee ee 13. 40 |10. 60 |11. 00 |...... 12. 44 
Tail to tip of tentacular arms.....-.-.------- 16.50 |17.50 |15.5 {12.00 |15. 50 |12. 20 |12.50 |...... 16.12 
Tail to base of dorsal arms ......-..-------- 10.00 | 9.40 | 9.00 | 7.90 |10.00 | 8.30 | 8.20] 6.50} 8.84 
PL AINLO) CONtOL OF CY Oi << 2-1 ones ce a alae eae OQ S0b BsGOr WW Sa2oi, |) Foo. |e Os oO) F717. 00 [ooo ocheacesee 
Tail to edge of mantle, above -.--..---...--- 8.60 | 8.00 | 7.75 | 7.10 | 8.70 | 7.50 | 7.20 | 5.70 |....-.. 
Tail to edge of mantle, below .....---.------ 8.20 | 7.50 | 7.30 |...--. SLO FLO GIES: || 5:38) |asece. 
Tail to insertion of fin .-..--.-..---....-..-- 3. 30 |-3.20 | 3.10 | 2.75 | 3.50 | 2.90 | 2.80 | 2.10} 3.44% 
Breach Or tin no <Gesasn cote eee as eA ia 4,20 | 4.30 | 4.25 | 3.78 | 5.15 | 3.80 | 3.90 | 2.65] 3.60 
Between lateral insertions. ...-..........-..|.-.-..|.----- OU 20 eeOO |" se 40M emateet | snaml| palsies = 
Front edge, outer angle to insertion .-.....-. 2.20 | 2.20 | 2.00 | 1.90 | 2.50 | 2.80 | 2.10 | 1.45 |......- 
Outer angle to tip of tail................--.- 3.30 | 3.25 | 3.15 | 2.90 | 3.50 | 3.00 | 2.90 | 2.00 |:...... 
Circumference of body == -- 422222 -~--20-5> eA 804) 40 SOM ee eeic nae 3505/64. 30) VAS 00M 5 Socal stan 
Bread hot DOM. 2is acu leek tekeeeee esener TOM MLA OOF |mecis ue nte 2.15 | 1.30 | 1.40] 1.10} 1.40 
Breadth of head at eyes ....-..--.-.--...--- LiGO7) doON ea) Deb) AGS) 1200/1805) 100) see5- = 
Breadth of eye-opening. ....-.....-.--.-.-.. PTRU) |e SEOr cere Perel SOL arse BYE Ge |e -ecaae 
Breadth of siphon at bridle........--.-...-. ci Dil eesaghOn |e OD 55 78 60 a Boal see Hoes 
Length of head, mantle to base of dorsal | 
A Se AC GIRO r EE SSaSOO SORES EHEC OSHREe 1.40 | 1.40 |°1. 25 SOs BO) |) 780400 ei80Nle eae as 
Length of dorsal arms...-.-......-..--.-... 3.75 | 3.60 | 3.25 | 2.70 | 2.65 | 2.20} 2.48 | 1.75] 3.20 
eemodtinoted pate samee Sos tee e Sae sai -fals 4,30 | 4.20 | 4.00 | 3.15 | 4.40 | 2.70 |} 3.12 | 2.25) 4.00 
Mencph Olsdt Palla. saca\k emacs) a lelaate o 4.10 | 4.25 | 4.00 | 3.00 | 4.55 | 2.67 | 3.15 | 2.25} 4.00 
Hench org hipairs--. st ses. -coceheens eee 3.60 | 3.80 | 3.50 | 2.80 | 3.80 | 2.43 | 2.75 | 2.00] 3.60 
Length of tentacular arms.-.-..--...-------. 6.80 | 8.00 | 6.50 | 4.00 | 5.80 | 4.00 | 4.10] 4.50 | 7.28 
Menmuwenclnp 2.2 sacs-hasepeee es sseeaee 3.30 | 3.50 | 2.75 | 1.85 | 2.55 | 1.75 | 1.90 | 1.30 |....... 
Breadth of dorsal arms ..........------.---- 35 36 28 25 SDs 80s | poser 20) seater 
readin of 20 pain awe eee os scale eeee SEOs |W eaonl! WSON| ms 4o WSO |22-ioce BAD) saad 
Breadth) of Saupaity 7322S enone s ceee es SOGY | GCE Se Gia sets VSEty eet 64 | eecos TO0)ieacaas 
Brean orath pair: sss. cee ol acseeee eee SAAT SAAS) a0) |) eA) ht. SOs, | oases SPAM oaceae 
Breadth of tentacular arms. ........-..---.- BAD Mleei20. et SON me BOul enzo ulate a0n eect pili |pacetsae 
Breadth! of club\-2:2 32 Shs. .sues escent ee eae SEO ECU eee 1 lesa a alls PPA See So) oes 
Kront to back of 3d pair_..--.----.....-.--- 65 | .60 50 40 65 COT eestelSoccoelloacc noc 
DIAMETER OF SUCKERS. 
Largest on tentacular arms..--..--------.-- SS sock (| 15s] oa eee oo 
AT AOSH OM od Pall. o cee ace s--e aa ee eee cts SOLON Pokal yee it ee AOR Teta |e eben eee ete H 
Largest on ventral arms....-...-..---....-- Sere DLS OPI 09) |S OS) sO Bema mace ces 
PROPORTIONS. 
Fin-length to mantle-length, 1: .-...--....-.. 2.60 | 2.50 | 2.50 | 2.58 | 2.48 | 2.58 | 2.57 | 2.71 |....... 
Fin-breadth to mantle-length, 1:............ 2.04 | 1.86 | 1.82 | 1.87 | 1.69 | 1.97 | 1.84 | 2.15 |......- 
Length* to breadth of fin, 1:---..........-.. 1,27 | 1.34 | 1.37 | 1.37 | 1.46 | 1.30 | 1.39 | 1.26 |....... 
Length of head to mantle, 1:.-.........-.--- 6.14 | 5.70 | 6.20 | 8.87 | 6.70 | 9.30 | 7.20 | 7.12 |....... 
Length of dorsal arm to mantle, 1:....... -. 2129) | 2.22) 22385 |h2/625es528) 23.40) 1125960 |)'S) 25) te-b2—.). 
Tentacular suckers to mantle, 1:.......--.. 47.77 |47, 05 |51. 66 164. 54 151.20 |68.18 [55.38 |......]....c0- 
*The length of the fin, in these tables, means the distance from the lateral insertions to the tip of 
the tail, which is somewhat less than the extreme length. 
Some specimens, included both in this and the following tables, show 
small differences in their measurements (made at different times), due 
partly to the different degrees of extension employed in measuring 
them, and partly to the fact that the alcohol had been changed and its 
strength altered. 
