Some more sketchbook studies… I fell a little behind on posting stuff the last few weeks, but these were two of the pages I think came out pretty cool. Hope you guys think so too!
Limbs of the Cephalopoda
Whether squids, octopuses, and nautilus have “arms” or “tentacles” is often simply a matter of semantics, but the most accepted definitions (from what I’ve found) tend to define the “arm” as a tapered limb, with two rows of suckers along its entire length. “Tentacle” is typically a length of tapered limb with no suckers, leading to a distal club-like appendage, covered in suckers.
One exception would be limbs in the nautilus - they have up to 90 un-suckered limbs, but their limbs are called “tentacles” by those who study them, even without the terminal club.
Top right: Octopus vulgaris and detail of beak and arms
Top left: Detail of tenticular clubs in squid, from the Expedition of the Valdivia
Bottom right: Arm of Illex illecebrosis (Northern Shortfin Squid)
Bottom left: Tentacle of Illex illecebrosis
Dissection of the neck, shoulder and axilla.
By Joseph Maclise
Dissection of the neck, shoulder and axilla, deep dissection, shown in 2 numbered illustrations. 1 illustration showing thoracic and shoulder muscles divided to show brachiocephalic vein, axillary artery, brachial plexus, and axillary lymph nodes. Male cadaver, in vivo, anterior view. 1 illustration of dissection of axilla shown in isolation, showing brachiocephalic veins, axillary artery and axillary lymph nodes. Anterior view.
General: Plate signed with the artist’s monogram JM [Joseph Maclise]; printed by M. & N. Hanhart.